الفهرس 
الوضع الراهن لإنتاج أهم محاصيل الحبوبيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The processes of land improvement is the essential foundation in the implementation of state policy towards the vertical expansion because of its vital importance in addressing the problems of soil, maintenance and preservation of the deterioration and increase their productivity by improving the qualities of soil physical, chemical and biological weapons. where is the primary goal of carrying out soil improvement is to create optimal conditions for plant growth by removing the causes of soil degradation, which is given off under the system of irrigation and drainage well. The problem of the study is the agricultural sector faces many constraints that affect directly or indirectly on the importance of this sector and its role in providing food needs, especially grains and which ones not to use the land resources of agricultural exploitation, the optimal addition to lack of interest in their maintenance, which resulted in the deterioration of the properties agricultural soils, the high level of ground water table, increasing salinity and alkalinity, and the integration of soil particles and the resulting Tqlll permeability and Oassaobh into force of the water where, in addition to the uneven level of the soil surface, leading to increased amounts of water used in irrigation, and then double the production capacity is that calls attention to the need to improve and maintain the land and address the causes of degradation, and improve the physical and chemical properties of high productivity, which reflects its ability to increase agricultural production, particularly of cereals under study and thus increase national income. The study aims to measure the impact of technology used in soil improvement on economic efficiency and productivity of Mahsouli rice and wheat crops in Dakahlia Governorate in the process of plowing deep under the soil, add gypsum, agricultural, and the process of laser leveling and so by measuring a set of criteria including, the total costs, average production, total revenue, net revenue, profitability pound spent, pound profit the investor as well as some economic indicators, which may be useful to decision makers and policy makers in the field of economics of land resources, especially in the area of improving land productivity and increase productivity of wheat and rice crops. The study includes five chapters inaddition the problem of the study, the objective of the study, research method and data sources and the framework for the study. Part I deals with a study and review of the theoretical framework of reference for most previous studies, the second section deals with the study of current situation for the production of the most important cereal crops in Egypt and Dakahlia Governorate and found that the area planted with wheat in the Arab Republic of Egypt is growing at about .047. Million fedden a year represents about 1.9% of the average cultivated area of about 2508.58 thousand fedden during the period (1992-2008), and total production has increased by about 0.146 million annually ardebs represents about 0.34% of the annual average of about $ 4269.74 ardebs thousand during the same period, as shown increasing the area planted with wheat in the province of Dakahlia about 4.798 thousand acres a year represents about 2% of the annual average, and increased total production of wheat crop in the province of Dakahlia ardebb about 0.187 million per year represents about 3.8% of the annual average. As for the rice crop, it increased the cultivated area in the Arab Republic of Egypt with about 0.24 million fedden annually, representing approximately 1.62% of area average with about 1471.08 thousand acres during the study period, and that total production has increased with about 0.187 million tons annually, representing about 3.3% of the annual average of about 5583.12 thousand tons during the same period, as shown by the increasing area under rice cultivation in the province of Dakahlia with 11.439 thousand fedden annually, representing about 2.7% of the annual average increase in total production of rice crop in the province of Dakahlia about 60.008 tons per year represents about 3.6% of annual average