Optimizing Available Phosphorus in Calcareous Soils Fertilized with Diammonium Phosphate and Phosphoric Acid Using Freundlich Adsorption Isotherm

Table 1

Physiochemical properties of the soils used in adsorption studies.

Properties	Unit	Value
		S-I	S-II
pHs	—	7.20	7.30
ECe	dS m^−1	1.40	3.86
CaCO3	%	6.58	14.06
Organic matter	%	1.18	1.13
Olsen P	mg kg^−1 soil	15.56	9.35
Sand	%	15.53	20.12
Silt	%	47.45	47.54
Clay	%	37.53	32.52
Textural class	—	Silty clay loam	Silty clay loam