. . FERTILITY STATUS OF SOME SOILS IN SOUTH SINAI

Abstract

This investigation aiming at (i) studying the availability status of some nutrients, for instance, N, P, K, Fe, Zn, Mn and Cu in some soils of south Sinai area, (ii) defining the order of N, P and K requirements for wheat plants using the Diagnosis and Recommendation Integrated System (DRIS) and (iii) suggesting the best combination between nutrient and assessing the nutritional balance in wheat plant. Experimental work: Soil sampling:

To achieve the first o jective, lilly-eight soil samples from the surl1tce layer (0-30 em) were collected from ditkrcnt eight regions. Soil samples were air-dried, crushed, sieve-d through a 2-mm stainless steel sieve, mixed thoroughly and stored in plastic jars for the eharacterization of physical and chemical properties. The availability of some soil nutrients; i.e. N, P, K, Fe. Zn, Mn, and Cu was determined. The fertility status of these nutrients were assessed. To fulfill the second and the third objectives, two sets of greenhouse experiments were executed using sandy and loamy sand soils that arc dominating in south Sinai area.