Abstract
Phosphorus (P) sorption in soils is a key process governing the availability of P to crops. P sorption characteristics and their relationship to soil properties were determined in twenty-one paired surface soil samples (21 cultivated and 21 adjacent virgin soils) belonging to five soil types: Typic Calcixerepts, Typic Haploxerepts, Typic Endoaquepts, Vertic Endoaquepts, and Vertic Calcixerepts from sugar beet growing areas located in the north-west of Iran. After determining P adsorption isotherms, adsorption data was fitted to Langmuir and Freundlich equations to derive adsorption parameters. In comparison with Langmuir equation (R2 =0.82), Freundlich model provided a better description of P adsorption isothems (R2 =0.97) in both cultivated and adjacent virgin soils. Total P ranged from 1000 to 1398 and 1011 to 1394 mg kg-1, respectively. Continuous cultivation resulted in a considerable increase in available P (Olsen P) in cultivated soils. The amount sorbed P differed among soil types. The results showed that in all soils types except Typic Haploxerepts, equilibrium solution P concentration (EPC) was almost lower than the requirement for most crops (
Miraki, G., & Samadi, A. (2011). Effect of Continuous Cropping on Phosphorus Adsorption Characteristics in Some Calcareous Soils of North-West of Iran. Water and Soil, 25(5), -. doi: 10.22067/jsw.v0i--.11205
MLA
G. Miraki; A. Samadi. "Effect of Continuous Cropping on Phosphorus Adsorption Characteristics in Some Calcareous Soils of North-West of Iran". Water and Soil, 25, 5, 2011, -. doi: 10.22067/jsw.v0i--.11205
HARVARD
Miraki, G., Samadi, A. (2011). 'Effect of Continuous Cropping on Phosphorus Adsorption Characteristics in Some Calcareous Soils of North-West of Iran', Water and Soil, 25(5), pp. -. doi: 10.22067/jsw.v0i--.11205
VANCOUVER
Miraki, G., Samadi, A. Effect of Continuous Cropping on Phosphorus Adsorption Characteristics in Some Calcareous Soils of North-West of Iran. Water and Soil, 2011; 25(5): -. doi: 10.22067/jsw.v0i--.11205
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