Si application alleviates influence of some abiotic stresses on crop plants. Meanwhile, scarce information is avaiable about the significance of Si for helping the plants to overcome the injuries of N deficiency and herbicides pressure. Thus, two–year 2–field experiments were carried out in wheat. Experiment I involved three Si concentrations (Si0ppm, Si250ppm and Si500ppm) and two N levels(N100% and N50%). Experiment II examined four combinations of fenoxaprop–p–ethyl and Si: fenoxaprop–p–ethyl+Si250ppm and fenoxaprop–p–ethyl+Si500ppm (each either in sequence or in tank mixture), fenoxaprop–p–ethyl alone, hand weeding and weedy check. Under N deficiency (N50%), Si500ppm increased plant height as compared to the control. No significant differences in SPAD values were detected amongst Si concentrations under each of the two tested N levels. Si can partially alleviate negative N deficiency effect on wheat yield, causing its increase to level obtained under normal N supply. Si has no effect on weed biomass when applied with fenoxaprop–p–ethyl either in sequence or in tank mixing. The most promising treatment for maximizing wheat grain yield was the application of 100 kg N ha–1 (N50%) x fenoxaprop–p–ethyl+Si250ppm in sequence", which also, in the same time, means reducing both cost of crop production and environment pollution.

This research aimed to study the economical impacts of using different types of irrigation water to produce wheat crop, through economic analysis of crop production and its costs, in order to maximize the income of each unit of water. The sample of study was choosed from wheat farmers in El.Sharkia Governorate. The results indicated that the productivity of one feddan irrigated with fresh water and groundwater was 18.09 and 18.08 ardab/fed respectively. It was 17.72 and 17.11 ardab/fed. for land irrigated with mixed water and drainage water respectively. The feddan irrigated with fresh water consumed 2672 m3 compared with 2922, 2841 and 3263 m3 for groundwater, mixed water and drainage water respectively. The feddan of wheat irrigated with groundwater gave the high- est return of income changed costs that was 1.233 pounds. The farmers in the study sample used quantities of irrigation water greater than the amount that achieve efficiency in the case of irrigation with groundwater rate of 6.23%, while the farmers in the stud[1]y sample used quantities less than the amounts that achieve efficiency by 1.27%, 10.9%, 7.9% for wheat irrigated with fresh water, mixed water and drainage water, respectively. The research recommended using these different qualities of water in irrigation, but in the context of a set of parameters with not of focusing on the use of agricultural drainage water directly due to the Low productivity per feddan and the low average of water unit production and the share of water unit of the net return, certain attention should be paid to mixing drainage water with Nile water, and also to treating drainage water before mixing with fresh water of River Nile.

Two field experiments were conducted during the two successive seasons of 2011/2012 at the Experimental Farm, Kaha station, Qulubia Governorate to study the effect of using four levels of water regime ,i.e. 60%, 80%, 100 and 120% from class A pan evaporation and five safety materials, i.e. water (as control),amino-z, lithovit (a natural intensified CO2 foliar fertilizer ) as foliar spray on snap bean plants as well as the biofertilize mycorrhizal as a seed treatment before sowing and sap material as a absorbent polymer to increase with holding water capacity before sowing and the effect of that on growth, green snap bean yield Poulista cv ., physical and chemical characters as well as water use efficiency. The results indicated that, mycorrhizal seed treatment, lithovit foliar spray and soil treatment with sap material gave the highest values of green pod characters as well as the vegetative growth, in addition all the safety material used led to significant increment on pod yield and the favorable treatments were obtained by using sap material and foliar spray with amino -z. Concerning to using safety materials with water regime levels, it was found that, spraying snap bean plants with amino- z and irrigation with 120% levels from class A pan evaporation was the superior treatment on green pod yield followed by soil treatment with sap material with 60% of water level. Regarding to the mean of green pod weight, the results showed that treating seed with mycorrhizal and 120% level of water regime gave the highest values during the two seasons, then the treatment of foliar spray with lithovite with 80% level of water regime and the treatment by sap soil treatments with supplied by 60% of water irrigation. Concerning to water use efficiency, the data showed that supplied the plants with the highest amount of water 120% and 100% from water irrigation decreased the values of water use efficiency, on the contrary , it can obtained the highest values of water use efficiency from water supplied with 60% then 80% calculated by class A pan evaporation method. Regarding to the effect of safety material on water use efficiency, it was found that, sap treatment or foliar spray with amino-z then, mycorrhizal treatments gave the highest value of water use efficiency. Generally, it can recommend by using sap material of soil addition before sowing and foliar spray by amino- z followed by treating the seeds with mycorrhizal with irrigation level 60% or 80%to obtained the favorable green pod yield and the favorable water use efficiency.

The need to increase the organic soil matter for sustainable production to match food security under semi-arid Egyptian conditions (high temperature, low preception, shortage of organic fertilizer etc..) led to looking for new sources of oragnic materials such as  modern composting technologies and increase the effeiency of recycling. The field experiment was carried out during the two winter successive seasons of 2011 and 2012 under open field conditions in protected cultivation site, Central Laboratory for Agriculture Climate (CLAC), Agriculture Research Centre, Giza, Egypt. Peas (Pisum sativum), cv. Lincolin was used in this study. The study aimed to investigate the use of vermicompost as alternative organic fertilizer by different rates (15, 20 and 25 m3/feddan) compared to cattle manure (20 m3/feddan as a control) combained with two plant distances (30 and 50 cm) which  performed in split plot design. The obtained results indicate that increasing the rate of vermicompost from 15 to 25 m3/feddan led to increase the values of physical and chemical properties of both pea plants and yield characteristics. The highest vegetative growth characteristics were recorded by application rate of 25 m3/feddan combined with 50 cm plant distance followed by 20 m3/feddan combined with 30 cm compared to the other treatments. The application rate of vermicompost 25 m3/feddan combined with plant distance 30 cm gave the highest yield of peas per feddan. Concerning, the highest fruit quality parameters were estimated under application rate of vermicompost 20 m3/feddan combined with 50 cm. The recommended treatment under this study conditions was the use of vermicompost 25 m3/feddan combined with 30 cm followed by 20 m3/feddan combined with 30 cm of plant distance. The vermicomposting of organic wastes and applied it to the soil as an organic fertilizer instead of burial or inceneration led to store CO2 in the soil and decrease its emission.

The study aimed at studying economic effects of global energy and food on the most important Egyptian imports. Descriptive and analytical statistical methods were used to achieve study objectives. Mathematical averages percentages and annual growth rates of variables under study were estimated. Expected values of imported food commodities using double exponential smoothing method was used. The study reached to some important conclusions, namely Global price and production of oil, coal, natural gas, ethanol and biodiesel have risen during the period 1996-2011. There were also a significant relationship between world prices and production of the above products. The price elasticities were about 0.089, 0.32, 0.174, 0.062, and 2.5 for these products respectively. The increase of oil price has an impact on food imports showing an increase of about 3.46% as a result of 10%of oil price increase. The study revealed that world oil price will be about $133.2/ a barrel in the year 2015 compared with $112.9/ barrel in the year 2011. It is therefore expected that value of food imports will increase to about $ 12.9 billion in the year 2015 compared to $ 10.6 billion in 2011.

Effect of using different concentration of acetic acid (5, 7.5, 10 and 12.5%) on microbiological quality, pH, lipid oxidation and sensory properties of beef shawarma during storage at 4°C for 16 days were examined in this study. The results  showed   that addition of acetic acid at 10% concentration reduced and retard the growth of total number of  microorganisms by one log cycle, prevented  the growth of  Enterobacteriaceae, Coliform, E. coli , Psychrotrophic bacteria, and Staphylococcus aureus . in beef Shawarma   during storage at 4°C for 16 days. Both pH (6.1 to 6.14) and TBA (0.056-0.97  malonaldhyde absorbance /kg oil) did not much affected with increasing the concentration of acetic acid added to beef Shawarma. Meanwhile the increasing of acetic acid concentration caused a noticeable reduction in redness, slight changes in wave length, purity, visual density and brightness of beef Shawarma colour. Panelists showed that the dark grayish colour, sourish aroma, sourness taste, toughness texture of cooked beef Shawarma increased with increasing acetic acid concentration added to this product. Storage at 4°C for 16 days caused slight changes in the above measured properties.

Ninety nine yeast isolates were isolated from surface of mango fruits and were tested in vivo in preliminary study for biocontrol potential of Lasiodiplodia rot of mango fruits. According to primary screening, nine isolates were selected to continue the secondary screening using different concentrations of the washed yeast cells in water suspension to study their biocontrol efficacy at 16±1°C. It was found that using washed cells of yeast isolate Mg 147 (Candida multisgemmis) at 1x109, 5x108 and 2x108 CFU/ml produced complete protection for 14 days to wounds of mango fruit inoculated with spore suspension of the fungusLasiodiplodia theobromae 1x105 conidia/ml. Meantime, no lesion developed on the mango fruit treated with the isolates Mg 39 (Pichia guilliermondii strainA) at the highest tested colony forming unit (CFU) levels, i.e. 1x109 and 5x108 CFU/ml. Supernatant of the yeast cultures, tested in secondary screening, did not prevent spore germination of L. theobromae or decay of wounded mango fruit but had inhibitory effect. However, 1-Methylcyclopropene (1-MCP) treatment significantly reduced the infected area mm2 on mango fruit inoculated with L. theobromae (1x105 conidia/ml) during the 14 days of storage at 16±1°C and improved efficacy of isolates Mg147 and Mg39. When applied as combined treatments between 1-MCP and biocontrol agents, no lesion developed on the fruit treated with the isolate Mg 147 at 1x 108 CFU/ml or higher. Meanwhile, no lesion developed on the fruit treated with the isolate Mg 39 at 2x 108 CFU/ml or higher while, the percentages of rot reduction were ranged between 94.1% - 81.3% for  concentrations 1x108 and 6.6x107 CFU/ml respectively.

The Research aimed at measuring the impact of using different irrigations systems on the production and economic efficiency of the main summer crops cultivated in New Lands at Alexandria Governorate. In order to reach this objective, the research adopted the following: 1)  Presenting the benefits and costs of the main summer crops cultivated useing different irrigation systems. 2)  Measuring some of the economic efficiency indicators related to summer vegetables crops cultivated under some irrigation systems (3) Estimating the economic and production efficiency of the study crops cultivated under some irrigation systems (4) Presnting some possible economic recommendations which can improve and increase the production and productivity of the study summer vegetables crops. The research applied some descriptive analysis method on the economic variables associated with the study, in addition to quantitative economic analysis method to assess the economic efficiency standards for vegetable crops under study. The stochastic frontier analysis (SFA) has been applied to estimate production functions using the FRONTIER (Version 4.1c). The research also relied on field questionnaire data collected from 100 farms representing the most important cultivators of summer vegetable crops including squash, pepper, and eggplant cultivated during 2011/2012 in Alexandria Governorate's New Lands using traditional and modern irrigation systems. Analysis results showed the following results about the impact of applicating modern irrigation systems on the production and economic efficiency: (1) High indicators of economic efficiency of the vegetable crops cultivated using modern irrigation systems compared with those cultivated using traditional irrigation system, which means more efficient use of the economic resources used producing vegetable crops under modern irrigation compared with those under traditional irrigation, which calls agricultural economic policy makers to increase attention and spread the idea of using modern irrigation systems, especially in New Land, in order to increase agricultural production and reduce the deficit in the trade balance. (2) Production Efficiency Coeffecients for squash, pepper, and eggplant cultivated under modern irrigation system reachede about 75%, 80%, and 83%, while reached about 89%, 93%, and 91% for the same crops cultivated under traditional irrigation systems, which indicates that the chances of vegetable crops cultivated under modern irrigation system are larger than for those cultivated under traditional irrigation system due to more efficient use of production resources (3) The Economic Efficiency Coefficients of squash, pepper, and eggplant cultivated under modern irrigation systems reached about 73%, 77%, and 79%, while reached about 87%, 90%, and 88% for the same crops cultivated using traditional irrigation systems, which indicates that the chances of vegetable crops cultivated under modern irrigation systems are larger than for those cultivated under traditional irrigation system due to more efficient use of economic resources and economic gain. In order to expand the cultivation of vegetable crops under modern irrigation systems and raise the productivity rate, the research recommends the following: (1) Increasing the effectiveness of extension activities through agricultural extension officers to transfer the research recommendations to farmers, and train them in order to improve their experience, and enhance the trend towards adopting the use of modern irrigation methods to enhance agriculture advancement, (2) Encouraging the specialized scientific research centers to develop fertilization programs that match the needs of crop cultivated under modern irrigation methods and soil quality.

Gross national product (GNP) is considered as one of the important indicators that reflect the ability of national economy to achieve the main objectives of the state including creation of employment opportunities, development of export potentials, and positive contribution in reduction of the deficits in the balance of payments and the balance of trade. Analysis of the most important components of the gross national income is of considerable importance that enables the identification of changing values of individual components of the gross national product.  The study aimed at identifying causes of imbalance in the national economy through the following determination of the relative importance of Egyptian GNP and development of important economic indicators in the Egyptian national economy. Analysis and identification of the most important economic factors affecting expenditure on consumption, investment, exports and imports are mode through building single and multiple equation models aiming at identifying the most important economic factors affecting variables of the study. Moreover, forecasting the most are also mode important variables until.2020. Results obtained indicated that  the household consumer expenditure in 2012 was equal to 158.5 billion Dollars  representing  58% of the GNP, followed by Investment expenditure, representing 18% of GNP, followed by government expenditure, total exports and  total imports representing 9%, 8% and 7%, respectively. Results obtained proved that the most important economic indicators increased annually with different rates during the study period. Studying of the mutual impact between GNP and the study variables through building an econometric model and applying two stage least square method. The model contains six equations for GNP, total investments, total imports, total exports, government expenditure, and household expenditure. In addition, an identification equation for the (GNP= household expenditure + Investment expenditure + Government expenditure + net international trade). The study proved that while the most important determinants of the Egyptian GNPare total investments, total exports and imports factors, mostly affect total investment are total GNP, total Egyptian exports and exchange rate Egyptian Pound. In addition, factors determining total Egyptian Imports are total exports and the exchange rate of the Egyptian Pound. Moreover, factors determining government expenditure are total exports and households consumption. Furthermore, the household consumption is highly affected by GNP and total indirect taxes. Forecasted values of the study variables are obtained by estimating single equation trend model and simultaneous equation model.  Results obtained indicated that the forecasted value of the Egyptian GNP in 2020 will be equal to 334$ and 335 billion Dollars using single trend equation and simultaneous equation models, respectively. The forecasted total investment in 2020 is expected to be equal 64 billion dollars. The forecasted Total Egyptian imports and exports using single trend equation are 33.2, and 29.2, billion dollars, respectively. The forecasted values of total exports and imports in 2020 using simultaneous equation model are 32.8, and 830.1, respectively. Regarding Government expenditure results obtained indicated that the forecasted government expenditure is expected to take values of 31.9 and 51.4 billion dollars using single equation trend model and simultaneous equation model, respectively. Results related to the forecasted household expenditure in 2020 is expected to take values of $206.5 billion and $334 billion using single equation trend model and simultaneous equation model, respectively. Based on the research results, best forecasted values the study variables are obtained by using simultaneous equation models. This may be attributed to the fact that simultaneous equation mod- els takes into account all variables as well as the interactions between variables. Based on results the study recommend that the state would give the highest priority to economic policy that would lead to rationalization of household expenditure. In addition, aiming at reducing the Egyptian trade balance, policies that would lead to reduction of the gap between imports and exports by limiting imports and encouraging exports are highly recommended. Moreover, policies that increase and encourage investment, limit inflation, and control of prices of goods and services are expected to have positive impact on the Egyptian economy.

The study showed the the importance of the effect of seasonality in determining the amounts received for the transit market of vegetable crops in Egypt. As it turned out great linkage between the quantities and prices of vegetables in the transit market, which reflects the importance of reconsidering the random cropping and where there is no minimum or organizing thread. Where it should be to regulate the use of agricultural resources limited to Egypt and so achieve the maximum return for producers and consumers and the marketer and reduces wastage of resources in making a glitch between supply and demand, resulting in higher prices hurt consumer Login or drop in prices hurt farmers' incomes. It is worth noting that the changes in the agricultural sector, which is the main activity in the Egyptian countryside, especially in the light of economic liberalization policies such as the abolition of support for agricultural inputs, and the liberalization of prices of agricultural and left are determined by market forces, with the demolition of Tzawar marketing system for Khaddrady to irregular or balance of supply with the demand after the policy of economic liberalization in the agriculture sector, which increased from large fluctuations in prices as a result of increasing the gap between supply and  demand for agricultural commodities, and all of these reasons have led to an increase in poverty in the countryside and in Egypt in particular. This reflects the importance of Tzawar marketing system and return to the installation Almsola Central, which balances the needs of the consumer growing and limited agricultural resources by reducing the size of the gap between supply and demand, which reduces the price differences during the months of the year and which is reflected in the increase in income and welfare of the consumer and the producer together. The return of the agricultural cycle of the most important requirements for achieving balance in the prices of vegetables in Egypt and reduces loss in the limited agricultural resources and achieve the protection of soil fertility and reduces the need for fertilizers and pesticides. This regulation of the market productive agricultural reduce the imbalance between supply and demand, which increases the efficiency of the distribution of the use of agricultural resources among the wider use of alternative optimal resource allocation and reduce the waste of limited agricultural resources. Decreases as well as huge losses for producers and consumers at the micro level as well to reduce the negative effects on the macro level by reducing imports and increasing exports, where there is improved efficiency performance in the Egyptian agricultural sector at the micro level and kidneys.