الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
Both field studies and pol experiments have been performed to evaluate the nutritional status and distribution of elements in soil, dynamics of such elements being also evaluated.
Field studies were carried out at Salhia region of Esmailia governorate using the three crops of wheat, successive growth stages, as well as grapes and mandarin.
Physical and chemical characterisls of studied area were evaluated under different environomental conditions. Nutrient status in soil and dynruuics of the concerned nutritional elements were also detected both through the various profile layers and different selected locations. Finally, nutrient equilibrium among different forms of the studied macronutrients in soil was traced to study transfonnations of such elements from fonn to other.
Nutrient status in plants was studied in different plant parts to be then correlated with available form in soil for both macronutrients and micronutrients; evaluation for shoot : root ratios of wheat plants were also performed at different studied growth slngcs.
Pot experiments, on the oU1er hand, were designed for evaluation of certain phases of uptake dynamics, with corn being U1e chosen indicator plant..
Nitrogenous and phosphatic fertilizers were applied at 3 levels; status for both nitrogen and phosphorus in plants was determined, correspondent shoot I root ratios,
for all studied parameters of dry matter and concerned elements, being also detected.
Efficiency of absorption decreased as the rate of applied fert’ilizer increased, utilization quotient being not ’greatly changed for both studied nutrients dnring the
concerned growth period of the studied plants which seemed to be, along with fertilization design, affecting tl1e dynamics of nutrient absorption.