الفهرس 
المقدمهOnly 14 pages are availabe for public view
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Abstract
Most of developing countries including Egypt need to increase food production in order to face the continued increases in population. The Egyptian governorate made many efforts to raise the agriculture production through the agriculture development: horizontal and vertical.
The Egyptian government is interested to develop the North Sinai. The area of North Sinai estimates by 618 Km2 computing by 6 % of the Egyptian total area. North Sinai occupies a distinct geographical location and it is ties African continent with Asian continent. Sinai is considered an important because it has many natural resources that it can contribute in increasing Egyptian national income.
The Egyptian governments had established the national project to agriculture development in North Sinai that they were aimed at reclaiming about 220 thousand feddan and 400 thousand feddan west and east Suez canal respectively.
The main problem of this thesis is concerned with the shortage of the available resources especially the agriculture lands and irrigation water and also their inadequate to cover the requirements of the Egyptian people from food production.
The main objective of this study is to determine the best alternatives of the structure of crops at North Sinai through the period 2004-2008 on average.
The study is depended upon the descriptive analysis in explaining the cultivated area, productivity and output for major crops during the period 1990-2007. In addition the main techniques used in this study is multi-objective programming and non-linear programming to estimate the best alternatives for the crop structures in the light of the constraints of the available economic resources at North Sinai. Besides, the study depended on the secondary data published by Ministry of agriculture and irrigation and water resources and North Sinai governorate.
This thesis contains four chapters besides the introduction. Chapter one deals with the theoretical framework and the review of literature for the previous studies.
The second chapter: is concerned with the economic resources in north Sinai governorate. This chapter is divided into three sections. The first section concentrates on land resources in north Sinai. The total cultivated area estimated about 2911.86 thousand fadden representing about 44.6 % of total area in 2005 year and the total area unused for agriculture estimated 2602 thousand fadden computing by 40% from total area in the same year. The cultivated area distributes on Al arish, Rafah, El-sheikh Zowaied, Bir el-abd, El-hasana cities and Nekhl and estimated 11 %, 33 %, 36.1 %, 9 %, 10.3 %, 0.6 % respectively from total cultivated area for the same year. The second section is concerned with the human resources the number of population reached about 340 thousand persons, Al-arish population represent about 42 %, Bir el-abd 18.4 %, Rafah 17.1 %, El-sheikh Zowaied 13 %, El-hasana 12.6 % and nekhl 2.9 % respectively from total population of north Sinai during 2007 year. The three section deals with the water resources that come from two sources (1) rain water and (2) floods (most rains falls in winter). The available water resources in north Sinai estimate about 140 million m3/year form rainfall, about 33 thousand m3/month from trenches water and under ground water about 271 thousand m3/day.
The third chapter: illustrates the agricultural production in north Sinai governorate. The results showed that the cultivated area about 229.9 thousand fadden in 1990 year, and decreased to about 174.6 thousand fadden in 2007 year. The cultivated area in 6 centers in north Sinai was different from year to year in the period (1990 – 2007), this result due to rainfall levels in north Sinai.
The fourth chapter concentrates on the best alternatives of crop structure by using two tools: (multi-objective) linear programming and non-linear programming for period (2004 – 2008). On average analysis models of linear programming included 32 crops, 10 crops in winter (irrigated and rainfall), 7 crops summer (irrigated), 2crops Nile (irrigated) and 13 perennial crops (irrigated and rainfall). There are three scenarios, the first used special limits for seasons, crop area, irrigation, Labour and minimum level of current crop area. the second scenario used special limits for seasons, crop area, net returns, irrigation quantity, Labour and maximum level of current crop area, while third scenario used special limits for seasons, crop area, irrigation, Labour, minimum and maximum levels of current crop area.
The results of the first scenario was good compared with the results of second and third scenarios where the results showed that suggested crop structure was decreased about 32 thousand fadden in some winter crops and was increased by the same area in other winter crops. The summer crops area was decreased by 9.6 thousand fadden in some crops and was increased by the same area in other crops.
In first scenario, net return was increased in the suggested crop structure by about LE 184 million representing about 28 % from net return of current crop structure.
Also, the first scenario was good with compared by other scenarios, where the return of water unit was increased by 48.5% from water unit return for the current crop structure, while third scenario results was good with compared by other scenarios, Regarding water requirement decreased in the suggested crop structure. For the second scenario by 20.9 million m3.
The result indicated that the first scenario of the labor needs for the suggested crop structure was increased by 753 thousand /day. This scenario is considered the best among the other two.
The results of non-linear programming models were the same for the results of linear programming models. This refers to the logical results of this study. So we can provide these results to decision makers in North Sinai.