الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This work was conducted to study different forms of soil phosphorus, adsorption reaction of phosphates in soils, phosphorus fractions and some chemical methods used determining soil fertility status to investigate the effects of added equal amounts of
Phosphorus from different p-sources (organic and inorganic) on the dry matter production and phosphorus up take and also extended transformation of added
Soluble phosphate after and before successive cropping in some newel reclaimed
Soils of mania governorate. Soil were mixed with the tested materials (natural and inorganic p-sources) at the mentioned rate 45 kg P2O2 /fed.
Pot experiments with barley, soybean and zamias as test crops were conducted to study the effect of different p-sources on the dry matter production and phosphorus
Uptake in sandy and calcareous soils.