ORIGINAL_ARTICLE
Evaluation of Several New Bread Wheat Genotypes (Triticum aestivum L.) for Grain Yield and Its Components under Water Stress Conditions
Two experiments were conducted at the Agriculture Experimental Research Farm of the Faculty of Agriculture, Assiut University, in each of the two seasons 2011/2012 and 2012/2013. The first experiment was irrigated as needed (normal), while the second one irrigated only one time three weeks after sowing irrigation (drought stress). This work aims to evaluate 30 wheat genotypes (Triticum aestivum L.) and two check cultivars, namely, Giza 168 and Sakha 93 under normal irrigation and drought stress conditions. Separate analysis of variance revealed highly significant differences between the evaluated genotypes for all studied traits in the two seasons under each environment. Combined analysis of variance over seasons and environments revealed highly significant differences between seasons for no. of spikes/ plant and grain yield/plant. The mean squares due to environments, genotypes, (G x S) and (G x E) interactions were highly significant for all studied traits whereas the mean squares due to (G x S x E) interactions were highly significant for no. of spikes/ plant and grain yield/plant. Drought stress reduced spike length, number of spikes/plant, number of grainss/spike, 1000-grain weight and grain yield/plant by 5.04, 18.38, 9.40, 11.15 and 25.07%, respectively. The new genotypes Assiut 216, Assiut 238, Assiut 228, Assiut 726 and R 80 highly significantly surpassed the two check cultivars in grain yield/plant and some of correlated traits. The new genotypes Assiut 224, Assiut 248, Assiut 249, Assiut 406, Assiut 704 and MK 2-27 showed drought Susceptibility Index less than one and were considered tolerant to drought stress. It could be concluded that these genotypes can be used in wheat breading programs to improve grain yield and drought tolerance.
https://ajas.journals.ekb.eg/article_575_55dc00e6aae95e1581006080380c6336.pdf
2015-02-01
1
17
10.21608/ajas.2015.575
(Triticum aestivum L.)
drought susceptibility index
ORIGINAL_ARTICLE
Efficacy of certain insecticides and biocides against the tomato leaf-miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) at Assiut Governorate
The tomato leafminer, Tuta absoluta (Meyrick), is one of the key pests of tomato. Chemical control has been the main method of controlling it. However, reduced efficacy of some of the recommended insecticides has been observed. An experiment was conducted at Manfalout district Assiut Governorate during two successive tomato seasons (2012 & 2013) to evaluate the efficacy of different insecticides for the control of the tomato leafminer, T. absoluta on tomato. Eight treatments (five insecticides + control) in randomized complete block design were oriented. Five insecticides Demeron 10% Ec, Avaunt 15% EC, Coragen 20% SC, Proclim 5% SG, Radiant 12% SC, and two biocides’ namely; Dipel 65% DF and Mycotal 52% WG were applied. All the insecticides were significantly better than untreated check in reducing pest population after applications. Coragen 20% Sc proved to be the best followed by Dipel 6.5% DF and Radiant 12% Sc.
https://ajas.journals.ekb.eg/article_576_6167ea26932eff8fbd9903818add1011.pdf
2015-02-01
18
23
10.21608/ajas.2015.576
Tomato-Assiut province-pesticides
ORIGINAL_ARTICLE
The Relative Susceptibility of Certain Tomato Hybrids to the Moth Tuta absoluta (TLM), With Reference to the Role of Plant Age on the Level of Infestation
The tomato leaf miner (TLM), Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is one of the major pests that attacks tomato and other solanaceae plants. It is currently considered a key agricultural threat to tomato production in Egypt, within its spread on 2008.TLM is becoming resistant to many of the pesticides used in tomato fields. One of the potential alternative methods of control is host plant resistance as a tool in IPM program. We examined the susceptibility of certain tomato hybrids (TH99806, TH99807, E.448 and Super Jakal) against the TLM infestation, during the winter and summer seasons of two successive years (2012 and 2013). The results revealed that the TLM showed different states of preference towards the investigated tomato cultivars. This finding may be important in breeding programs aiming to develop tomato cultivars resistant to this pest. The intensity of TLM infestation was arranged according to the level of leaves on the plant, it was found that the eldest leaves harbored the highest level of infestation which attributed to the accumulation of larvae through the growing of host plant
https://ajas.journals.ekb.eg/article_577_f683b3dadf0b27559559676a65c26bc6.pdf
2015-02-01
24
33
10.21608/ajas.2015.577
Tomato hybrids
Tuta absoluta
Tomato leafminer
ORIGINAL_ARTICLE
Effects of Natural and Bio-fertilization as a Partial Substitute for Mineral Fertilization on Vegetative Growth and Fruiting of Balady Mandarin Trees
Balady mandarin trees grown under Qena region during 2012, 2013 and 2014 seasons were investigated to find the best NPK fertilization through 0 to 100% of natural or bio-fertilizers along with a mineral source. The experiment was arranged in a complete randomized block design with five replications, one tree for each, and it consisted of seven treatments. Filter mud cake and calcium super-phosphate, as well as rock phosphate and feldspar were added once in the middle of December. Biostimulants i.e., nitrobien, phosphoren and potassiumage were added in two equal doses in March and May. Potassium sulphate was applied in two equal doses in March and June, where mineral-N fertilizer was added in three equal doses in March, May and July. The obtained results could be summarized as follow:
- Using the recommended N, P and K via two forms or three forms (mineral, natural plus bio) resulted in an obvious promotion on all growth traits and leaf area and its nutrients, as well as shoot carbohydrates and C/N ratio compared to using them as a mineral fertilizer source only.
- Amending the trees with natural or bio-fertilizer singly or a mixture of natural, bio and mineral NPK fertilizers significantly improved the yield and fruit quality. No significant differences were noticed on most studied traits among all different treatments except with the mineral source (the check treatment).
- The improvement in the fruit quality and the reduction in the juice nitrite content were associated with reduction in the mineral NPK source and, at the same time an increase in the mineral or bio-fertilization sources.
It is evident from the foregoing results that using either three fertilization forms or any two fertilization forms produce healthy trees, with the highest yield and the best fruit quality. In addition, it reduces the environmental pollution as well as produces organic farming products.
https://ajas.journals.ekb.eg/article_578_72d1b9b1f8df5f15af096fc567a0296f.pdf
2015-02-01
34
47
10.21608/ajas.2015.578
Natural
bio-fertilization
Balady mandarin
yield
fruit quality
environmental pollution
NPK
ORIGINAL_ARTICLE
Marketing Efficiency of the Tomato Crop in Sohag Governorate
Tomato crop is considered an important food crops in Egypt. It is used in domestic consumption and exports to other countries, to increase its competitiveness in foreign markets.
Tomato strategic food crop is and has been important productivity and Consumer, so the marketing system for tomato and efficiency is of great importance for the economy of Egypt, Reduced marketing efficiency of the system catalog of tomato result in a great loss for producers and consumers, have been some marketing indicators of tomato such as margins absolute marketing and relative measurement, and spread and price per farmer producer of consumer payments, and efficiency of marketing. The study concluded that marketing margins affected tomato prices, and prices of farm affect the production of tomato, and that margins the absolute marketing for wholesaler and retailer than a steady increase, as well as decreased marketing efficiency of tomato estimates during periods The first three study except the fourth period, some high and more than 50% on one and two periods, this means that marketing costs for tomato in this period of more than production costs during the periods mentioned.
https://ajas.journals.ekb.eg/article_579_488e2f1e53a777ba10039b2a84d440cf.pdf
2015-02-01
48
57
10.21608/ajas.2015.579
Marketing efficiency-tomato-Sohag
ORIGINAL_ARTICLE
Economic study of Production and Consumption of Potato in Egypt
Potato is considered one of the most important vegetable crops in Egypt because potato use as a food crop and the manufacturing of some food industries, the government makes great efforts in order to develop and increase agriculture production to take pace with world rate production, the Egyptian agriculture policy does her best to increase the product of Egyptian crops, especially food stuffs, to face the increasing need of population and the increasing agriculture exports to save hard currency. So this research primary aims to study the gap between production, consumption, and self-efficiency to promotes and develops Egypt’s potato exports, and search for new market windows to absorb the excess production of potato. For this purpose, each of Potato cultivated area, potato productivity, production, consumption, surplus production, self-sufficiency, lost potato, average per capita were used during the study period (1998-2012)
The result indicated that the production of Potato was about 2815 thousand ton and tends to increase by 203 thousand ton annually during the period (1998 -2012) the consumption of it during the same period was about 1774 thousand ton self-sufficient was about 157%, this means there is a surplus in production than the local consumption, in the same time increasing the export from it to increase the hard currency in one hand and facing the needs of developing the projects of agriculture.
https://ajas.journals.ekb.eg/article_580_8882019762084cb8f4005eaa0a4ee28b.pdf
2015-02-01
58
67
10.21608/ajas.2015.580
Potato-production-consumption-economic study
ORIGINAL_ARTICLE
Production and Exports of Egyptian Potatoes and its Competitive Position in the World Markets
The Egyptian Foreign trade is currently the main Moving Factor for Economic and social development process by providing foreign exchange and contribute to the reduction of the trade deficit. Despite the growing global demand for agricultural products but exports are growing at rates expected in this context this research aims to study the evolution of the cultivated area and production for Feddan and potato production in Egypt, studying the evolution of quantities and values of Egypt's exports of potatoes, analysis and assessment of the competitive situation for potato exports, and identify efficient export
https://ajas.journals.ekb.eg/article_581_4ddcdd820211319c3db41d39d5320ec6.pdf
2015-02-01
68
82
10.21608/ajas.2015.581
Global markets-Egyptian potatoes
ORIGINAL_ARTICLE
Marketing Efficiency of the Wheat Crop in Sohag Governorate
Wheat strategic food crop is and has been important productivity and Consumer, so the marketing system for wheat and efficiency is of great importance for the economy of Egypt, Reduced marketing efficiency of the system catalog of wheat result in a great loss for producers and consumers, have been some marketing indicators of wheat such as margins absolute marketing and relative measurement, and spread and price per farmer producer of consumer payments, and efficiency of marketing, the study concluded that marketing margins affected wheat prices, and prices of farm affect the production of wheat, and that margin the absolute marketing for wholesaler and retailer than a steady increase, as well as increased marketing efficiency of wheat estimates during periods The first three study except the fourth period, all low and less than 50%, this means that marketing costs for wheat in the county of less than production costs during the periods mentioned.
https://ajas.journals.ekb.eg/article_582_fbe05e672727b54d493203343b3a2eb7.pdf
2015-02-01
83
92
10.21608/ajas.2015.582
Marketing Efficiency-wheat-Sohag Governorate
ORIGINAL_ARTICLE
Using the Dynamic Time Series Models for Forecasting the Prices of Surge Crops in Egypt
There are many econometric methods for forecasting by different economic variables in the future, recently, the procedures of dynamic forecasting either for Univariate or multivariate models were available for estimation on the software packages, i,e,, EViews,
The research problem of the study, concerned with the different types of such dynamic models, with respect to, estimation, choosing the best fit model for forecasting by the economic variables, i,e,, price on the agricultural and national level, So the objective study, is to concentration and determination the best forecasting model among Univariate and multivariate dynamic time series models,
The time series data on the farm gate price of sugar cane and sugar beet were collected from the ministry of agriculture during the period (1998-2013),
The methodology framework discussed the theoretical and mathematical approach for the dynamic Univariate models, i.e. autoregressive integrated moving average (ARIMA).
The dynamic models contain four stages that have, identification, i.e. Stationarity and Co integration tests, model selection criteria for determination the lag length, Granger causality test, and choosing the techniques of estimation, also estimation stage, diagnostic stage for model accuracy, and finally forecasting stage,
The study estimated the dynamic models by (ARIMA) models, (during the period (1998-2013), and forecasting by price of the two crops through the period (2015-2020),
The estimation and forecasting results, indicated that the price will increase at increasing rate.
Finally the study recommended by more projection studies in the field of agriculture with its different resources , and encouragement the investment in projects that have high returns , the expanding in cultivating new lands and national projects, also increasing the price of these crops that reflect the high productivity.
https://ajas.journals.ekb.eg/article_583_7c9ee38ec06db6c27086ec9f0b9db295.pdf
2015-02-01
93
107
10.21608/ajas.2015.583
Time series animation-sugary-crop
Prices