eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
3
11
10.21608/ajs.2015.14555
14555
Original Article
RESPONSE OF SNAP BEAN PLANTS TO SOME AGRICULTURAL TREATMENTS FOR EARLY YIELD PRODUCTION
Nahed, M.M. El-Shimi
1
Self-Veg. Cro. Res. Dept., Hort. Res. Inst., Agric. Res. Cen., Giza, Egypt
Two field experiments were carried out during two early summer seasons of 2012 and 2013 years at the Experimental Farm of Kaha Station, Qalubia Governorate to study the response of snap bean plants Poulista c.v to some agricultural treatments for early green pods yield production using (flowering, amcotone, super phosphate solution compounds) as foliar nutrition, (charcoal, agriculture sulphur and charcoal + agriculture sulphur) as soil addition and( Pea, onion and broad bean) as protection plants, in addition using black polyethylene plastic as a soil mulch. The results indicated that spraying the plants with flowering and amcotone compounds followed by super phosphate solution had the highest values of fresh and dry plant weight. While addingcharcoal to the soil before sowing snap bean seeds gave the highest values of no. of leaves/ plant followed by spraying withflowering and amcotone compounds, respectively. The data showed also that spraying the plants with flowering, amcotone compounds, super phosphate solution, adding charcoal + sulphur and soil mulch with black polyethylene plastic exerted the highest values on all parameter of green pods its and yield attributes in both growing seasons. Concerning total sugars in dry pods it's clear that using protection plants with broad bean followed byonion were the best treatments on it. Generally it can recommend using any one of the mentioned treatments in this experiment especially flowering, amcotone compounds, super phosphate solution, charcoal + sulphur, respectively to obtain high green pod yield either early or total with the best quality.
https://ajs.journals.ekb.eg/article_14555_c7abcf717e6313ff3193ae47521253d1.pdf
Snap bean
Foliar nutrition
Protection plants
Early yield
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
13
23
10.21608/ajs.2015.14556
14556
Original Article
EFFECT OF USING BIO – AND ORGANIC FERTILIZERS ON PRODUCTIVITY AND QUALITY OF CUCUMBER CROP UNDER PLASTIC HOUSES
Al-Hmoudi, A. S.
1
Mohamed H.
2
Al-Menaway M.
3
Hussain A.
4
Ministry of Environment and Water United Arab Emirates
2- Hort, Dept. Fac. of Agric, Ain Shams Univ., Cairo, Egypt
Hort, Dept. Fac. of Agric, Ain Shams Univ., Cairo, Egypt
Ministry of Environment and Water United Arab Emirates
An experiment was carried out to study the effect of Bio and organic fertilizer on cucumber growth and yield during two successive seasons of 2010 and 2011 at Northern region in united Arab Emirates. The Queen cucumber hybrid was fertilized with different organic fertilizers i.e. Horse manure, compost, chickens manure and cows manure. Also using the bio fertilizer i.e. phosphobactein, Azotobacter and mycorrhizal. The results showed that cucumber yields differed in their response to the bio and organic fertilizer. The results showed that the compost was higher nitrogen percent and lower in C/N ratio, and pH, than the others organic fertilizer especially horse manure. The study demonstrated that the average cumulative cucumber yield was higher with compost + 22 (gm) mycorhizol/ plots treatments compared to other treatments throughout the experiment during the two successive winter seasons of 2010 and 2011. The plant height and plant fresh weight (g), with N100% mineral (control) deceased by 28% and 40% compared to N 100% organic (Compost) respectively during the winter season of 2010. The nitrogen, phosphorus and potassium content of cucumber fruits (%) significantly increased, as did the soil with the increase of organic fertilizes applied. The experimental results confirmed the combination of bio-and organic fertlizers could increase plant growth, yield and quality. It also confirmed that composted organic fertlizers can be used a source of nutration instead of chemical fertlizers for cucumber plants.
https://ajs.journals.ekb.eg/article_14556_32b8af86acf60048dd16cd67a57aeed2.pdf
organic
fertilizers
Bio-organic Cucumber
Plastic House. Productivity
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
25
36
10.21608/ajs.2015.14557
14557
Original Article
EFFECT OF USING SOME TREATMENTS ON SWEET PEPPER IRRIGATION AND ITS EFFECT ON FRUIT YIELD AND ITS QUALITY
Usrya, A.I. Byan
1
Nahed, M.M. El-Shimi
2
Veg. Res. Dep., Hort. Res. Inst., Agric. Res. Center, Giza, Egypt
Veg. Res. Dep., Hort. Res. Inst., Agric. Res. Center, Giza, Egypt
Two field experiments were carried out during two summer seasons of 2013 and 2014 years at the Experimental Farm of Kaha Station, Qalubia Governorate to study the effect of using three irrigation intervals (7, 15 or 21 day) and five treatments of water absorbent substrates as adding to soil before transplanting ,i.e. (without substrates (control), SAP at 15 kg/fed., SAP at 20 kg/fed., compost at 5 t/fed. and compost at 10t/fed.) on sweet pepper plants c.v. Mohanad and the effect of that on growth, yield, physical and chemical characters of sweet pepper fruits. The results indicated that, the highest values of all vegetative growth parameters, yield and yield components were registered by the treatment of 7 days or 15 day irrigation intervals. Concerning of using water absorbent substrates, it was found that, pepper plants grown in the soil fertilized at 10 t/fed. or treated with super absorbent polymer (SAP) 20 kg/fed., respectively gave the highest values of vegetative growth parameters, yield and yield components.It is obvious that the plants fertilized at 10 t/fed. and irrigated every 7 days gave the highest values of fruit length, fruit diameter, fresh fruit weight and total yield. While, plants treated with SAP at 20 kg/fed. and irrigated every 15 day gave the highest values of fruit diameter and fresh fruit weight, but the differences did not reach to significance level for fruit length and early yield in both growing seasons. On the other hand, compost at 10 t/fed., compost at 5 t/fed. and SAP at 20 kg/fed. with irrigation every 21 day were the best treatments for yield and yield components of pepper plants. Generally, it can recommend by using compost at 5 t/fed., or super absorbent polymer (SAP) at 20 kg/fed. with irrigation every 15 days and this mean that increased the irrigation period without any injury or statistical effect on the fruit crop to obtain high pepper fruit yield with height quality and height net income to the growers.
https://ajs.journals.ekb.eg/article_14557_1db231eab1852260f04df1414d4225c8.pdf
sweet pepper
Irrigation intervals
super absorbent polymer (SAP)
compost
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
37
49
10.21608/ajs.2015.14558
14558
Original Article
WHEATGRASS JUICE AND ITS NUTRITIONAL VALUE AS AFFECTED BY SPROUTING CONDITION
Dina A. Anwar
1
Abou El-Yazied A.
2
Thanaa, F. Mohammadi
3
Abdallah M.M.F.
4
Regional Center for Food and Feed, Agri. Res. Center, Giza, Egypt
Horticulture Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
Regional Center for Food and Feed, Agri. Res. Center, Giza, Egypt
Horticulture Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
Wheatgrass juice is the young grass of the common wheat plant (Triticum aestivum) freshly juiced for human consumption. The objective of the investigation performed was to assess the nutritional value of wheatgrass juice under laboratory and open field conditions at two different cuts. Protein, chlorophyll contents, minerals content (Ca, Fe, Mg, Zn and Se) and amino acids content as well as phytochemical constituents were determined. Grown wheatgrass at laboratory caused an increase of the protein content of its juice over open field condition. High chlorophyll content was observed under open field especially at second cut. Most of minerals content underwent to increase under open field except Mg content. Aspartic acid was recorded the highest amino acid in both laboratory and open field. Total essential amino acids were increased under open field condition at both first and second cut followed by first cut at laboratory. No big changes of natural phytochemicals constituents can shown between laboratory and open field condition while it was more pronounced compare with wheat seeds. The study suggested that sprouting wheat seeds at laboratory and open field improve the nutritional value of grass juice with preferably to laboratory condition especially at first cut and for saving agricultural land.
https://ajs.journals.ekb.eg/article_14558_028e0f24ae47a285d12d8769484d9422.pdf
Wheatgrass juice
nutritive value
sprouting
Chlorophyll
Sprouting condition
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
51
60
10.21608/ajs.2015.14559
14559
Original Article
EFFECT OF VINE BUD LOAD ON BUD BEHAVIOR, YIELD, AND CLUSTER CHARACTERISTICS OF AUTUMN ROYAL SEEDLESS GRAPEVINES
Abdle Hamid N.
1
Samah, I. Nasr
2
Korkar M.
3
Department of Hort. Faculty of Agric., Ain Shams Univ., Cairo, Egypt
Ministry of Agriculture, C.A. Afforestation and Environment, Egypt
Higher Institute for Agric. Co-Operation, Cairo, Egypt
This study was conducted through the seasons of 2013 and 2014 to determine the optimum bud loads/ vine for Autumn Royal seedless "grapevines. Three years old uniform vines were uniform chosen and pruned to four levels of bud load, namely (32, 42, 52 and 60 buds/ vine). With fruiting spur at 2, 3 and 4 buds per spur The results showed that the percentage of bursted buds was decreased significantly by increasing bud load /vine in the two seasons of the study. Data also indicated that 42 buds/ vine were more suitable for Autumn Royal seedlessgrapevines to produce good yield and fruit quality. On the other hand, 32 buds/vine or 60 buds/vine were unfavorable science it produced rather clusters. In addition, pruning Autumn Royal seedless "grapevines to 42buds /vine by leaving 21 spur with 2 eyes/spur or leaving 14 spur with 3 eyes per spur resulted a high yield and good quality, reduced cluster compactness and reduced shoot berries %, gave the greatest cluster weight, berry firmness, adherence, T.S.S and anthocyanin content. Increasing bud load increased number of cluster/vine and yield but reduced cluster weight. Vines pruned to 32 buds / vine gave the greatest C/N ratio of the canes. Whereas vines pruned to 60 buds / vine showed higher percent of T.A than the other levels of bud load and cane length.
https://ajs.journals.ekb.eg/article_14559_64969a171b296783b7d7e842108acf88.pdf
grapevine
winter pruning
Autumn Royal seed-less grapes
bud load
fruit quality
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
63
73
10.21608/ajs.2015.14560
14560
Original Article
SOME MODELS OF PREDICTED EQUATIONS OF MAIZE RESPONSE YIELD TO FERTILIZER APPLICATIONS
Zeinab, E. Ghareeb
1
Hoda, E.A. Ibrahim
2
Sahar, A. Farag
3
Central Lab. for Design and Stat. Anal. Res., ARC, Giza. Egypt
Central Lab. for Design and Stat. Anal. Res., ARC, Giza. Egypt
Central Lab. for Design and Stat. Anal. Res., ARC, Giza. Egypt
Two field trials were conducted at Giza Research Station, with split plot design with three replicates during the two successive summer seasons in 2012 and 2013. The aim of this study was to find out the effect of cotingen for covering seed by four treatments (zero, 7.5, 15 and 22.5 g kg-1 grain) and six nitrogen fertilizer levels (control, 30, 60, 90, 120 and 150 kg fed.-1) on maize yield and yield attributes of single cross 10 cultivar. Stepwise multiple linear regression analysis was used to determine the importance of yield components and to predict the yield under different levels of nitrogen and cotingen rates. Nitrogen levels exhibited significant effect for all studied traits, while cotingen were significant for100-kernels weight; shelling% and grain yield traits only. The interaction between cotingen and Nitrogen was significant for row per ear, shelling% and grain yield. Meanwhile, stepwise linear regression analysis showed that 100-kernels weight, number of kernels per row and shelling% were the most important contributing traits to yield (R2 = 82.11%). The nitrogen rates for maximum yield derived from the four statistical models (linear, logarithmic, quadratic, and exponential) describing the response of yield, using the R2statistic to select a model, which shows how each of the models fits the data. The quadratic model best described the yield responses observed in this study. Further confirms the role of nitrogen and cotingen fertilizers in increasing yield production in maize. The 5th N rate under 3rdcotingen (120 Kg fed-1 + 22.5 and 15g kg-1 grain) produced the highest yield being 34.70 and 34.65 ard. fed-1 over all treatments. This is very close to recommendations. The 4th N (90Kg fed-1) rate under any cotingen level produced higher yield than any nitrogen rate only. Economically, considering optimum N fertilization rate, 105.18 Kg fed-1 nitrogen and 22.5 g kg-1 grain cotingen was the most reasonable level. This is considerably below the current recommendation. Therefore, results confirmed that higher cotingen treatment decreased the optimal nitrogen and increased the yield.
https://ajs.journals.ekb.eg/article_14560_98c2752072535b9f62e2bf2f506a1af8.pdf
Maize
nitrogen
Cotingen
fertilization
Profit
Logarithmic
linear
Yield Response
Exponential and quadratic model
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
75
89
10.21608/ajs.2015.14561
14561
Original Article
PERFORMANCE AND STABILITY OF SOME BREAD WHEAT GENOTYPES FOR GRAIN YIELD, PROTEIN AND GLUTEN CONTENTS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS
El-Marakby A. M.
1
Afaf, M. Tolba
2
Saleh, S. H.
3
Abdel Samie, F. S.
4
El-Gabery, Y. A.
5
Department of Agron., Fac. of Agric., Ain Shams University, Cairo, Egypt
Department of Agron., Fac. of Agric., Ain Shams University, Cairo, Egypt
Department of Agron., Fac. of Agric., Ain Shams University, Cairo, Egypt
Department of Agron., Fac. of Agric., Fayoum University, Egypt
Department of Agron., Fac. of Agric., Ain Shams University, Cairo, Egypt
Seventeen genotypes (G) of bread wheat (14 promising lines and 3 commercial cultivars) were evaluated for mean performance and stability of grain yield/plant, grain protein content and dry gluten percentage under 16 environments (two locations (L), two sowing dates(D) and four fertilization treatments (F)). The resultsconfirmed the existence of considerable genetic variation among genotypes and their performance was significantly affected by different environments for the studied traits. Kalubia locations recorded the highest mean values for grain yield/plant while; Fayoum location recorded the highest mean values for the two quality traits. Yield and quality traits were significantly increased on early (recommended) sowing dates at Kalubia and Fayoum locations than on late sowing dates. Applying biofertilizer only gave the lowest mean performance in all traits, but adding mineral N besides biofertilizer markedly increased grain yield/plant and the two quality traits. However, insignificant differences existed between the rate of nitrogen recommended (80kg N/fed.) and the rate of (biofertilizer + 60kgN/fed.), indicating that biofertilizer could be efficient in reducing costs of the expensive mineral N and reducing environmental pollution. On an average highest values of grain yield/plant were recorded by the promising wheat lines no. 10 (24.57 g), no. 9 (22.50 g), and no. 11 (21.64 g) as compared to the best check cultivar Giza 168. Meantime, this cultivar surpassed the other genotypes in protein and dry gluten percentages. Concerning phenotypic stability, the three superior lines no. 10, 9 and 11 gave the highest mean values (x¯) of grain/plant coupled with significant regression coefficient (bi) values higher than unity and significant deviation from regression (S2di), thus they considered specifically adapted to favourable environments.
https://ajs.journals.ekb.eg/article_14561_d21297fc1fac9bdadb6373bdfefd4f78.pdf
Bread wheat (Triticum aestivum
L)
genotypes
sowing dates
locations
Biofertilizer and Pheno-typic stability
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
91
99
10.21608/ajs.2015.14562
14562
Original Article
NEGATIVE INTERRELATIONSHIP BETWEEN NUMBER OF BERSEEM CUTS AND COTTON YIELD AS A FOLLOWING CROP
Rizk, T. Y.
1
El-Agroudy H.
2
El-Sherif M.
3
Zizy M. Abbas
4
Crop Institute Research Section, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
Agronomy Department, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt
Agronomy Department, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt
Agronomy Department, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt
The present investigation was carried out at the Experimental Farm of the Faculty of Agriculture at Fayoum, Cario University at Dalla, Fayoum Governorate during the two seasons 2000/2001 and 2001/2002. The aim of this investigation was to study the effect of organic manure and number of berseem cuts on cotton yield and its components and fiber traits. The obtained results indicate that only plant height at harvest, number of fruiting branches / plant and the height of the 1st fruiting branch were significantly affected by organic manure (O.M.) application. On the other hand, organic manure did not affect significantly the seed cotton yield, yield components and fiber quality traits. Cotton planting dates affected significantly all studied vegetative growth, seed cotton yield, yield components and fiber quality traits. Early planting date (1st week of March) showed significant superiority over the other two planting dates (1st week of April & May) in number of fruiting branches/ plant, number of days to 1st flower appearance and 1st boll opening, number and weight of open bolls/ plant in the 1st& 2nd pickings, seed cotton yield, lint percentages and studied fiber quality traits. The decreases in the total seed cotton yield attributed to the late planting dates (1st week of April & May) amounted 26.4 and 84.8% and 30.6 and 84.1% of March planting with the treatments of 10 and 20 m3/ fad organic manure, respectively.
https://ajs.journals.ekb.eg/article_14562_2615992e155d500de6e9d944a5894541.pdf
Cotton
Berseem cuts
organic manure
planting date
cotton yield
Fiber Quality
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
101
109
10.21608/ajs.2015.14563
14563
Original Article
EFFECT OF SOLAR UV RADIATION ON ANTIOXIDANT ENZYMES AND PHENOLS BIOSYNTHESIS IN LETTUCE (Lactuca sativa)
Mervat A.R. Ibrahim
1
Hany A.M. Srour
2
Biochemistry Department, Faculty of Agriculture, Ain Shams University, 68 Hadayek Shoubra, PO 11241 Cairo, Egypt
Biochemistry Department, Faculty of Agriculture, Ain Shams University, 68 Hadayek Shoubra, PO 11241 Cairo, Egypt
This study aims to evaluate the effect of solar UV radiation on defensive enzymes activities in lettuce seedlings. Seeds of lettuce were grown in high tunnels for 35 days, exposed to three different levels of solar UV, created by using three different types of plastic films. Each plastic film transmits different levels of solar UV (0% in UV-B, 4% in UV-L and 83% in UV-T). The obtained results indicated that solar UV radiation has led to significant decrease in seedling fresh weight. UV-B treatment resulted the highest shoot and root length while UV-T treatments exhibited the highest shoot: root ratio. Solar UV radiations have no effect on peroxidase activity in shoots. While ascorbate peroxidase was activated and catalase was inhibited in shoot by UV-T treatments. In lettuce roots, peroxidase, ascorbate peroxidase, and catalase activities were increased by increasing the level of solar UV radiation. In case of UV-T, phenylalanine ammonia lyase (PAL) activity in both shoots and roots of lettuce seedlings was higher than those of other treatments. In addition, Phenols are accumulated in lettuce shoots as a result of UV radiation in UV-L and UV-T treatments. Also, phenols in roots increased by increasing solar UV dose. The study concluded that solar UV radiation induced some antioxidant enzymes, increased the accumulation and biosynthesis of phenolic compounds and reduced lettuce seedlings growth.
https://ajs.journals.ekb.eg/article_14563_03accb5e8482838206f5b37548ad54f4.pdf
UV Radiation
Lettuce (Lactuca sativa)
peroxidase
catalase
Ascorbate peroxidase
phenolic com-pounds
phenyl alanine ammonia lyase
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
111
119
10.21608/ajs.2015.14564
14564
Original Article
EXOGENOUS APPLICATION OF GLYCINEBETAINE IMPROVES ANTIOXIDANT SYSTEM IN GREEN BEAN (PHASEOLUS VULGARIS) SEEDLINGS UNDER SALINITY STRESS
Hany A.M. Srour
1
Biochemistry Department, Faculty of Agriculture, Ain Shams University, 68 Hadayek Shoubra, PO box 11241 Cairo, Egypt
Salt stresses collectively are responsible for many crop losses worldwide especially salt -sensitive plants. The present study investigates the roles of exogenous application of glycinebetaine (GB, 5mM) in improving salt stress tolerance in salt sensitive green bean seedlings. Salt stresses (45mM NaCl for one week) significantly reduced leaf relative water (RWC) and chlorophyll (chl) content and increased percentage of electrolyte leakage, endogenous Proline and lipid peroxidation. Activities of peroxidase(PX), ascorbate peroxidae (APX), superoxide dismutase (SOD), and catalase (CAT), were significantly increased in shoots and roots of green bean seedlings subjected to salt stress. Exogenous application of GB improves salt tolerance of green been seedlings as shown by increased RWC and chlorophyll contents in leaves and reduced percentage of electrolyte leakage, lipid peroxidation and proline content. Under salinity stress condition, GB application decreased the activities of PX, CAT, APX and SOD in seedling shoots, whereas, it increased the activities of CAT and AP in roots. The result suggests that exogenous application of GB increased green bean seedlings' tolerance to salt-induced oxidative damage by upregulating their antioxidant defense system where this compatible solute protect plant cell against salinity stress.
https://ajs.journals.ekb.eg/article_14564_58badaa2cde75670dbb913e57d3e01d8.pdf
salinity stress
glycine betaine
Phasolus val-garus
Antioxidant defensive enzymes
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
121
135
10.21608/ajs.2015.14565
14565
Original Article
COMPARATIVE EFFECTS OF THERMAL TREATMENTS AND -IRRADIATION ON THE VOLATILE, NON-VOLATILE AND ANTIRADICAL ACTIVITY OF EGYPTIAN ANISE ESSENTIAL OIL
Mostafa M. Ismail
1
Mohamed Abass
2
Magda A. Abd El Mageed
3
Fouad Osman
4
Karima. A. Mahmoud
5
Engy. M. Mohamed
6
Gamil. E. Ibrahim
7
Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
Chemistry of Flavour & Aroma Dept National Research Center. NRC, Dokki, Giza, Egypt
Chemistry of Flavour & Aroma Dept National Research Center. NRC, Dokki, Giza, Egypt
Food Irradiation Dept., Atomic Energy Authority, National Centre for Radiation Research and Technol, Egypt
Chemistry of Flavour & Aroma Dept National Research Center. NRC, Dokki, Giza, Egypt
Chemistry of Flavour & Aroma Dept National Research Center. NRC, Dokki, Giza, Egypt
The effect of various thermal treatments (electric oven, microwave) and g-irradiation at three doses (6, 8 and 10 KGy) on the composition of volatile and non-volatile of anise essential oil and also their antioxidant properties were considered. The hydrodistilled oil (HD) of control and treated samples were subjected to gas chromatography–mass spectrometry (GC/MS) analysis. The volatile profile of raw HD oil of anise consisted mainly of transe-anethole (79.68%) followed by hexahydrofarnesyl acetone (6.95%), para-anisaldehyde (5.49%); g-himachalene (2.53%) and estragole (0.76%). Although the effect of roasting didn’t cause significant changes in the total yield of major compounds of HD anise oil which are phenylpropanoid derivative (transe anethole , para-anisaldehyde, cis-anethole and estragole (=methylchavicol), it is found that gamma irradiation revealed the same behavior at the 10 KGy irradiated sample but decrease the total yield of these compounds in 6.8 KGy irradiated sample compared to control one. also the thermal and g- irradiation caused drastic increase in the total yield of sesquiterpenes whereas decreased oxygenated compounds in all samples under investigation compared to control one. Such changes affected the antioxidant activity of the treated samples 1.1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging as well as β-carotene bleaching test against butylated hydroxy toluene (BHT). The strongest effect of reduction of DPPH radical as well as the highest inhibiting effect of the oxidation of linoleic acid and the subsequent bleaching of β-carotene was by 8 KGy irradiated sample which comprised (84.57%±1.43); (85.21% ± 0.12) respectively, in comparison to BHT (98% ± 0.0) at the same concentration 30 µg/mL besides all samples under investigation revealed high antioxidant activities due to their high content of phenylpropanoid and oxygenated compounds. These confirmed by total phenolic content. High performance liquid chromatography (HPLC) method was used for the analysis of phenolic compounds in the selected sample. Polyphenolic compounds were analysed on C18 Reversed Phase (RP) HPLC. A total of 9 phenolic compounds were identified, the obtained results showed that the predominant compound was P-qumaric acid (43.36%) followed by ferulic acid (21.06%).
https://ajs.journals.ekb.eg/article_14565_fda20f261e9948f8bc67cf50253b44a6.pdf
Anise oil
thermal processing
-irradiation
antiox-idant
volatile and nonvolatile
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
137
155
10.21608/ajs.2015.14566
14566
Original Article
ISOLATION, SCREENING AND IDENTIFICATION OF PROMISING YEAST ISOLATES USED FOR BIOLOGICAL CONTROL OF ORANGE GREEN MOULD
Shehata, S. T.
1
Department of Plant Pathology, Faculty of Agriculture, Ain Shams University, Shobra El-Kheima, Cairo, Egypt
Ninety nine yeast isolates were isolated from surface of apple, grape, orange and tomato fruits. The isolates were tested in vivo in preliminary study for biocontrol potential against green mould of navel orange fruit. According to primary screening, twenty two isolates were selected to continue the secondary screening (phase one) using different concentrations of the washed yeast cells in water suspension to evaluate their biocontrol efficacy at 21±1°C. Among twelve yeast isolates were passed to the secondary screening (phase two) at 7±1°C, washed cells of yeast isolates CT 503, CT 507, CT 508, CT 512 and CT 550 at 1x109, 2x108 and 1x108 CFU/ml produced complete protection for 21 days to wounded navel orange fruits inoculated with spore suspension of Penicillium degitatum (1x104 conidia /ml). Meantime, no lesions developed on the navel orange fruits treated with the yeast isolates CT 503, CT 507 (Debaryomyces hansenii var. hansenii strain C) and CT 512 (Endomycopsella vivi) at 6.6x107CFU/ml, while the percentage of rot reduction of the isolate CT 550 (Candida edax) was 99.81%. Culture filtrate of twenty two different yeast isolates used in secondary screening (phase one) did not prevent decay of wounded navel orange fruits but had an inhibitory effect on rot development. The relative abilities of the promising yeast isolates (CT 503, CT 507, CT 512 and CT 550) to induce disease resistance against P. digitatum on navel orange fruits were studied. Inoculation of promising yeast isolates significantly triggered induction of resistance in navel orange fruits. The lesion diameters of green mould 66 hours later after inoculation by spore suspension of P. digitatum in a neighbouring wound that was made approximately 6 mm away from the initial woundwhich inoculated withthe isolates CT 512, CT 550, CT 507 and CT 503 were reduced by 25.5%, 20.5%, 16.7% and 14.1%, respectively. In this respect, there were no significant differences among the three different isolates CT 503, CT 507 and CT 550.
https://ajs.journals.ekb.eg/article_14566_9ddf7552f942c699e5507d058753c2bd.pdf
Postharvest diseases
Navel orange
biological control
Penicillium degitatum
Candida edax
Debaryomyces hansenii
Endomycopsella vivi
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
157
165
10.21608/ajs.2015.14567
14567
Original Article
NEW DISTRIBUTIONS OF SOME SPECIES OF EGYPTIAN FLORA
Habeeb, H. R.
1
EL-Khanagry S.
2
Mohamed A.
3
Flora and Phytotaxonomy Researches Department, Hort. Res. Inst.; Agr. Res. Center, Giza, Egypt
Flora and Phytotaxonomy Researches Department, Hort. Res. Inst.; Agr. Res. Center, Giza, Egypt
Flora and Phytotaxonomy Researches Department, Hort. Res. Inst.; Agr. Res. Center, Giza, Egypt
This research reviews the distribution of some old species of the Egyptian flora in different phytogeographical regions. Results are compared with the suggestions given by Täckholm (1974), El-Hadidi and Fayed (1994/95), El-Khanagry and Mohamed (2004), and Boulos (2009). The research includes new distribution of 38 species belong to 34 genera and 22 families.
https://ajs.journals.ekb.eg/article_14567_014e21081a7ff82c510d4383f9bd916c.pdf
Flora of Egypt
Phytogeographical regions
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
167
177
10.21608/ajs.2015.14568
14568
Original Article
IMPACT ANALYSIS OF THE GOVERNMENT POLICIES ON FRUIT AND VEGETABLE SECTOR IN SUDAN IN 2003 AND 2009
Elsayed, E.E,M. Alnagarabi
1
Ahmed S.
2
Mohamed A.
3
Department of Agricultural Economics, Faculty of Agricultural Sciences, University of Gezira, Wad Medani, Sudan
Ministry of Agricultural, Gezira State, Wad Medani, Sudan
Department of Agricultural Economics, Faculty of Agricultural Sciences, University of Gezira, Wad Medani, Sudan
The main objective of this paper was to analyze the impact of government policies on fruit and vegetable sector in 2003 and 2009 in terms of profitability, protection, efficiency, competitiveness and comparative advantages. The study depended on secondary data and information collected from relevant sources and references. The policy analysis matrix (PAM) adopted as an analytical model to achieve the study objective. Private profitability, social profitability, nominal protection coefficient on outputs, nominal protection coefficient on inputs, effective protection coefficient, domestic resources coefficient private cost ratio and subsidy ratio to producer were calculated for the crops under study. The study results show that fruit and vegetable sector was taxed for outputs and subsidized for inputs, the net effect of outputs taxation and inputs subsidies resulted in a net taxation on value added at varying degrees. Consequently, it could be concluded that, although the overall impact was negative and tending to be worse, but the study results indicate that there are still comparative advantages in fruit and vegetable crops production. The study recommended further vertical and horizontal expansion of fruits and vegetables, strengthening production infrastructures, and government should enact efficient policies that correct the distorting tradable - outputs policy.
https://ajs.journals.ekb.eg/article_14568_70399e07efb27c0dd705b5dd7f76d9a3.pdf
government
Policies
Policy analysis matrix (PAM)
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
179
186
10.21608/ajs.2015.14569
14569
Original Article
PRELIMINARY ASSESSING THE ROLE OF MICRO-CATCHMENT WATER HARVESTING TECHNIQUES IN IMPROVING GRAZING COVER VEGETATION IN HAMA STEPPE (DEBAH SITE) -SYRIA
Al-Khalil S.
1
Kawas M.
2
Abbas G.
3
Department of the Natural Activated Resources and Environment, Faculty of Agriculture Aleppo University, Syria
Department of the Natural Activated Resources and Environment, Faculty of Agriculture Aleppo University, Syria
Department of the Natural Activated Resources and Environment, Faculty of Agriculture Aleppo University, Syria
To evaluate the performance of micro-catchment water harvesting techniques in combating desertification and the land degradation in the arid and semi- arid areas in Syria, this study was conducted at Debah Site of Hama Steppe / Syria, about 100 km north east of Hama city, about 70 km of Salamieh city and about 60 km north east of Hamra area. Community-based approach was introduced as an alternative to better manage the available and degraded resources. The micro-catchment water harvesting techniques were tested at the site (manually prepared semi-circular, contour ridges). Tow spacing (6 and 12m), and three fodder species: (Atriplex halimus, Atriplex leucoclada and Salsolavermiculata) were compared. Statistical analysis of the 2011-2012 showed high efficiency of micro-catchment water harvesting techniques in improving land productivity through increasing soil moisture content and shrub growth and shrub survival rates as compared to the control without water harvesting. Atriplex halimus recorded the highest survival rates and biomass as compared to other species.
https://ajs.journals.ekb.eg/article_14569_595c33aab42441dcb332e8ea103ba076.pdf
Water harvesting techniques
Cover vegetation
Debah site
Hama
Syria
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
189
203
10.21608/ajs.2015.14570
14570
Original Article
THE IMPACT OF TRAINING PROGRAM FOR HYDROPONICS (AGRICULTURE ROOFS)ON A GROUP OF TRAINEES IN DESERT RESEARCH CENTER
Zeinab M. Abdelrahman
1
Lecturer in Rural Sco. of Agric. Ex. Dept. Fac. Agric. Ain Shams University, Shoubra El-Kheima, Cairo, Egypt
The research to identify the impact of the training program held at the Desert Research Center en titled" hydroponics" ((Agriculture roofs) to change the level of knowledge of the trainees related to agriculture, water (Agriculture roofs), and to identify trainees in the program, and the most important problems faced by the trainees during the training , in addition compare what was actually gained and what to is expected , therefore it may be able to develop a proposal for a training program for the Agriculture roofs a questionnaire is made before and after the participants attending program held by the Desert Research Center among a large number of projects implemented by different bodies totally training programs thirty two trainees attending training it for four hours a day over consecutive days two (19 - 20) in January 2014. Frequencies, Proportion, will cocoons test, used to data analysis. The results of the analysis show that there is a change in the level of knowledge of the trainees with regard to agriculture, (the Agriculture roofs) compare with then prior the number of trainees knowledge has increased from 18%to 59.3% after attending the program. In general the notice of trainees attending to the program has in creased to almost 53%. Problems faced the trainees were that they were not able to visits agriculture roofs models and training on such system. This my help to comp air then knowledge before on often attending the program , the program used depends on theoretical, CDs and not used posters, demonstration of practical viewing and , posters or clarify the practical displays the results, clarification of practical experience , participation of trainees, thus other important issue uses such as cultivation methods, diseases and actual costs wear not available to trainees finally the program has evaluated the knowledge of trainees at the end of program whit out refining to then knowledge at the beginning the program.
https://ajs.journals.ekb.eg/article_14570_440801e4693b23109f758ebe41f7df1f.pdf
The impact
Hydroponics
Training program
Ag-riculture roofs
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
205
223
10.21608/ajs.2015.14571
14571
Original Article
PRODUCTION ECONOMICS OF CATTLE FATTENING IN NEW VALLEY GOVERNORATE
El-Shatla, H.S. A.
1
Aly S.
2
Abd Allha A.
3
Agricultural Economic Department, Desert Research Center, Cairo
Agricultural Economic Department, Desert Research Center, Cairo
Agricultural Economic Department, Center of Agricultural Research, Asutte
Fattening cattle projects represents an important role in the agricultural economy, as these activities contribute by about 36% of the total value of agricultural production, amounting to about 159.09 billion Egyptian pounds. The average value of medium term livestock loans presented by the Bank of Development and Agricultural Credit during the period (2000-2012) was about (3 – 7.8) million Egyptian pounds, respectively. The search was a problem in that in spite of the availability of many economic possibilities and productive conditions that support and strength the chances of success of fattening cattle projects New Valley Governorate it was shown that Governorate has a Weak Contribution in Live stock Production. The objectives of these research is studying productive and economic efficiency for fattening cattle through some economic and technical relations to identify the most important factors that affect the economic efficiency in production. These objectives has been realizing depending on two methods of data collection, the first depends on secondary data, and the second depends on the primary data through using questionnaires to collect data a sample of cattle breeders at (Mott, acement, balat villages) at Dakhla district. The study used qualitative and quantitative statistical methods to achieve the objectives of the study, such as the equations of time trend in it's linear and quadratic, cubic, forms and use multi-phased regression method. The most important results that research can be summarized as follows: Decrease in short-term current value animal loans by annual rate of about 0.37 million pounds. Decrease in short-term real terms animal loans by an annual rate of about 0.23 million pounds. Decrease in medium-term current value animal loans by an annual rate of about 0.95 million pounds. Decrease in medium-term real terms animal loans by an annual rate of about 0.34 million pounds. Increase numbers of cows by an annual rate of about 11.1 thousand units. Decrease the numbers of buffalo by an annual rate of about 0.03 thousand units. Increase the numbers of sheep by an annual rate of about 4.9 thousand units. It shows also the in significance of increasing the numbers of goats. Declining numbers of camels by an annual rate of about 0.28 thousand units. Results of calculating the production function of calves for total sample of the study shows a statistical significant positive relationship between gross flesh and the quantity of each of green fodder, concentrated and dry, employment and the weight of the animal at the beginning of the grow-out period, as an increase in the amount of those variables respectively by 1% leads to an increase in the amount of output by about 0.055%, 0.692%, 0.161%, 0.008%, 0.037%. Results showing also that the marginal product of feed for total sample was about 7.79, 75.68, 17.39 kg live weight of feed green, concentrated, dry, respectively, means that the marginal product of concentrated feed greater than the marginal product of other feed refers to preferential use of concentrated feed production red meat. The optimum weight and maximizing profit weight for the total sample was about 445, 495 kg. In light of results, the research recommends the following: Expansion in the establishment of livestock production projects, and work to support and encourage breeders by increase loans, and to facilitate the procedures for obtaining it. 2. Increasing the concentrated feed production in deferent areas to be compatible with the geographical distribution of animal wealth.
https://ajs.journals.ekb.eg/article_14571_e537d6559620658fc674f96dca61f23d.pdf
Production Economics
Cattle Fattening
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
225
236
10.21608/ajs.2015.14572
14572
Original Article
A STUDY OF FARMER'S KNOWLEDGE ABOUT USE PESTICIDES AND CHEMICAL FERTILIZERS IN NAMUL AND SNDION VILLAGES, TOKH AND QALIOUB CENTERS, IN QALIOUBIA GOVERNORATE
Samia Mahrous
1
Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt
The recent study aims to: identify the degree of knowledge of farmers using pesticides and chemical fertilizers, in addition, identifying the sources of knowledge of the farmers on the use of pesticides and chemical fertilizers, and determine the relationship between the independent variables studied and knowledge of farmers using pesticides and chemical fertilizers degree and to identify the most important problems facing the respondents in study area. The study was conducted in Qalioubia governorate. Data were collected through the personal interview with asystemtic random sample of 350 far- mers in Qalioubia governorate using aquestionnaire. Frequencies, percentages and simple correlation coefficient (Pearson) were utilized to present and analyze data. The most important findings were: 50.6% of the respondents had alow level knowledge. The fending also indicated significant correlation at 0.01% level between the area of agricultural holdings, and the degree of attiude towerds agricultural extension, and the degree of attiude towerds inovations. There were significant correlations at 0.05% level between the degree of leader ship and the degree of awareness of demage excessive use of pesticides, and the knowledge of the respondents level using pesticides and chemical fertilizers. There were non significant correlations between dependent variable and: age and the respondent's education level and the degree of social participation.
https://ajs.journals.ekb.eg/article_14572_8a52722a67dae19bcfc5736b2bea3734.pdf
Farmer's knowledge
The use of pesticides and chemical fertilizers
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
237
253
10.21608/ajs.2015.14573
14573
Original Article
IMPROVEMENT OF FOREIGN TRADE FOR THE IMPORTANT AGRICULURE CROPS IN EGYPT
Hanan Ghaly
1
Fawzia Saber
2
Department of Economic Studies, Division of Economic and Social Studies, Desert Re-search Center, Cairo, Egypt
Department of Economic Studies, Division of Economic and Social Studies, Desert Re-search Center, Cairo, Egypt
Agricultural foreign trade represents an important place in the total foreign trade for its contribution to the amount of change in the deficit in the trade of agricultural balance plus or minus, and thus change the extent of the deficit in the trade balance, and foreign trade which reflects the production, consumption and investment variables through the evolution of exports and imports. The problem with research in the State to take a lot of policies that help the development of exports and reduce imports of agricultural ones especially, but he agricultural exports did not achieve its objective which reflects the weak economic performance in the trade deficit, and the goals of research identify the evolution of exports and imports of the subject of the study crops, and the study of the economic efficiency of the Egyptian agricultural foreign trade through the relative importance of exports and imports of agricultural goods through the international exchange rate, and estimate the total agricultural foreign trade efficiency, which Based on appreciation to a number of indicators including coverage rate, dependency ratio, the degree of economic participation. According to the results obtained, the average coverage of trade overall rate was about 43.86%, while the counterpart of agricultural trade amounted to about 41.2%, indicating a lack of total agricultural exports to the requirements of the total and agricultural development cover, also results indicate that the average economic dependency of the trade rate total amounted to about 56.92%, while the counterpart of agricultural trade amounted to about 15.3%, which indicates a decline of agricultural dependence on counterpart rate at the national level, and reached the total average degree of economic participation of trade about 40.39%, while the counterpart of agricultural trade amounted to about 43.7% which refers to the coverage of agricultural trade to the proportion of 92.5% of total trade, also indicate a net food balance and the ratio of exports of food imports to the existence of permanent disability in food balance statistics, has been the exchange rate decreased commodity crops study namely rice, wheat, maize, dry beans and potatoes to less than one is true, which means that the exchange rate in an invalid state and this would lower real income and the low level of well-being as a result of lower exports of these crops and this is due to the obstacles facing agricultural exports, and recommended research need to take care of software development and support services for agricultural exports from the structure key export and activating the agreements, and the expansion of agricultural projects that produce for export.
https://ajs.journals.ekb.eg/article_14573_8f23ed40b20e4efd9893487bf454bea3.pdf
Exports
Imports
Commodity exchange
Cover-age rate
Dependency rate
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
255
266
10.21608/ajs.2015.14574
14574
Original Article
AN ECONOMIC STUDY FOR PRODUCTION OF MAIZE IN THE NEW LANDS
Heba F. Mohamed
1
Hoda, Kh.A El-Mekser
2
Cent. Lab. for Design and Stat. Analysis Res. ARC, Giza Egypt
Field Crop Res. Institue, ARC, Giza, Egypt
This research amid at studying the most important productivity and economic indicators for maize crop in the reclaimed during the period (2001- 2012), the geographical distribution of areas, productivity and production of maize in the reclaimed, the most important production problems facing farmers of maize in the reclaimed and suggestions of producers to solve them, identify the most important factors affecting maize production crop and estimate the cost function with determining the minimization of costs that achieve the highest productivity of maize crop were also made the study is based on random field sample with a size of 110 farmers from county of Al-Dakhla, Al-khrga, Farafra, Paris, Balat of New Valley Governorate during 2014 year . When estimating size of productivity per feddan for maize crop which may minimizes productivity costs to the lowest level in the New Valley Governorate, it was showed that this size is estimated at 2.04 tons/feddan in the season of 2014. The number of farmers who have reached this volume of production amounted to 20 farmers of the total sample size of 110 farmers with ratio of 18.18%. The study showed that most important quantitative variables affecting average production per feddan of maize crop in the New Valley Governorate using stepwise multiple regression procedure were the amount of nitrogen fertilizer, amount of phosphate fertilizers, number of workers as there was significant correlation between independent variables and the dependent variable. These three factors explain about 82 % of the total influencing factors affecting the production of the crop. So, the study recommends focusing on nitrogen and phosphate fertilizers due to the nature of the soil. The study recommends that price fertilizer may be decreased, provision of fertilizers in cultivating areas to avoid transportation costs, The need to provide specialized technical labor by the State and public agencies on training skilled technical labor, and support agricultural production and reduce agricultural machinery prices all these chains shall lead to reduce Egypt's imports of maize needed to develop livestock sector and to reduce the burden of foreign currencies.
https://ajs.journals.ekb.eg/article_14574_cb06e371667f72112b0154299e15db7e.pdf
Stepwise multiple regression
Production func-tion
Cost function
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
267
283
10.21608/ajs.2015.14575
14575
Original Article
THE ECONOMIES OF FISHERY PRODUCTION AND FISH FARMING IN EGYPT
Elkhishin, E.A. E.
1
Ghada S.A. Mahdi
2
Higher Institute for Agricultural Co-operation
Institute for Agricultural economics Center for Agricultural research
World countries are highly involved in securing food for their citizens. With the rising world population, the world has increased the demand on fisheries as one of the protein supplements. The economic importance of fisheries comes from the fact that it is a renewable natural resource that can generate high economic revenues. This paper thus aims to address the main factors that contribute to increasing the fishery production in Egypt. The main findings are as follows: The feed ranked the first in terms of relative importance of total costs in civil farms. It accounted for around 59.9% and 65.23% respectively in the first and second groups. In the second rank came the farm rent constituting around 14.05% and 13.34% of total costs for the first and second group respectively. The findings revealed that average productivity per Acre estimated around 3.711 tons, 4.63 tons/acre for the first and second group respectively. The net investment revenue estimated around L.E. 0.49, 0.79 for the first and second group. The estimated optimum production point that minimizes costs is around 7.09 tons, 5.21 tons for the first and second groups respectively. The revenue/cost ratio estimated around 1.49, 1.79 times for the first and second group respectively. This is a higher-than-one number; thus revealing the feasibility of investing in these projects. Policy recommendations In light of the findings and in order to achieve inclusive development in this vital sector in Egypt, the study recommends directing more investments to the sector and constructing more farms in light of their high economic significance. It is important to provide preferential loans with flexible terms for farmers in this sector Enhancing the use of production and manufacturing technology in this sector. Disseminating the problems faced by the sector to universities and research centers to be studies and to find out practical solutions.
https://ajs.journals.ekb.eg/article_14575_980f0919d5963e0cbd7db6c2ea75abb8.pdf
Estimated optimum production
Productivity feeds
Fisheries economies
eng
Ain Shams University, Faculty of Agriculture
Arab Universities Journal of Agricultural Sciences
1110-2675
2636-3585
2015-03-01
23
1
285
300
10.21608/ajs.2015.14576
14576
Original Article
ECONOMICAL AND ECONOMETRICAL ANALYSIS OF POTATOES CROP IN REPUBLIC OF YEMEN, (DHAMAR PROVINCE – CASE STUDY FOR THE YEAR OF 2014)
Al-Akwa Ali
1
Mabrok Sharaf
2
Faculty of Agriculture and Veterinary Medicine –Thamar University
Faculty of Agriculture and Veterinary Medicine –Thamar University
In spite of the development observed in the area and production of potatoes crop in Yemen for the period of (1990-2010) to the level of self-sufficiency, the exported quantity, however, still very limited, It even decreased sharply in 2010 by 84.5%, compared to it's level exported in 2006. Stagnant productivity of potatoes in Yemen at around 13 ton only per-hectare, in front of (35- 45) ton/h globally, is believed to be the main obstacle standing behind the failure of exportation the Yemeni potatoes to the abroad. According to field study, several results have been obtained, the most important of which: The variables, such as, chemical fertilizer, equipment, manure and seeds are found to be the most effective factors on the output of potatoes. It is proved statistically significant at (0.01) level and responsible for the change occurred in the production of sampled individuals by 77% (R2), however, the result show that the quantity used in the production process of potatoes by mentioned above factors fill short to meat the level of optimal quantity required to maximize the profit. The size of optimal level of production was estimated at (19.9) ton and the price of potatoes accepted by producers was estimated at 121390 YR/Ton. According to percentage of importance, seeds came first at the total variable cost by 31%, then, irrigation by 17.6%, fertilizers and pesticides 14.6%. Net revenue was estimated at (493640) YR, and the benefit /cost ratio was estimated at 1.40. The most important recommendation reached by this study is directed toward more using inputs in process of production by producers of potatoes, to maximize profit and increase productivity of area cultivated.
https://ajs.journals.ekb.eg/article_14576_b4df6fade0a2b9b94081452c6864e9dc.pdf
Estimation
Function
production
cost
Potatoes
Thamar
Yemen