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Abstract
ABSTRACT
Incubation and pot experiments were carried out to investigate the effect of sulphur application on the supplying
power of some nutrients in Egyptian soils . The soils used were , three soil samples from calcareous soils , two
from alluvial soils and two from sandy soils . These soils cultivated in the pot experiment with sudan
grass than alfalfa plants and treated with four rates of elemental sulfur ( S ) as 0 % , 0.5 % , 1.0 % and 2.0 %
under two particle size of S treatments .
The incubation experiments results were increase in the concentration of each of of P , K , Fe and Mn .
These concentrations progressively increased with increasing S application up to 2 % and its fine particle was more
than coarse and very coarse particles treatments . The pH values decreased gradually with increasing S application , while the EC and soluble sulphate increased .
The results of pot experiment showed that the total fresh and dry weights increased with increasing S application
up to 2 % , these increments were associated with fine particle size of S treatment . Also , the total uptake
of each of P , K , Fe and Mn were increased in all rates of S and the highest increments were associated with high
rate of fine sulfur ( 2 % ) . The chemical analysis of soils after cropping showed also decreasing in pH values
and increasing each of EC , soluble sulphate and SAR relative to the control treatments .
The Gypsum formation values increased gradually with increasing S application in all soils under study , while
the higher values were recorded with the calcareous and alluvial soils than sandy soils .
Elemental sulphur – Fine– Coarse – very coarse –particles - the propriets of soil – sudun grass – alfalfa plants – K – P – Fe – Mn – EC – soluble sulphate –.pH- gypsum formation . Key Words