الفهرس 
INRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Two experimental sites of arable sandy soil located at Abou Omera Al-Sharkeya village , Baltim district, Kafr El-Sheikh Governorate were chosen. The main objectives of this investigation were to study and evaluate the effect of natural raw minerals, soil conditioner types, their mixtures and application rates in sandy soil subjected to different irrigation deficits on the following parameters: ( i )soil properties( chemical, physical, moisture constants and nutritional status after cereal crops harvesting ; ( ii )agronomical production of wheat and maize crops after full maturity and (iii) crop water productivity in the studied soil under consideration. Four types of soil conditioners [bentonite , compost , mixture of natural mineral raw materials (MNRM)and their mixtures 1:1:1(w/w)] were applied before cultivation.Three levels of soil moisture depletion regimes were used ( 30, 50 and 70 % ) from its available water capacity. Conditioners improved soil physical, chemical properties and enhanced crop water productivity. Also, irrigation at 50 % depletion from available water gave the best values of crop water productivity.