Fixation and recovery of added phosphorus and potassium in different soil types of pulse-growing regions of India

Srinivasarao, C and Singh, R N and Ganeshamurthy, A N (2007) Fixation and recovery of added phosphorus and potassium in different soil types of pulse-growing regions of India. Communications in Soil Science and Plant Analysis, 38 (3-4). pp. 449-460.

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Abstract

Fixation and recovery of added phosphorus (P) and potassium (K) were studied in different soil types of pulse-growing regions. Amounts of P and K fixed increased in all the soils irrespective of type and texture. With the increase in levels of added P and K, maximum P fixation was observed at lower levels of added P (50 mg kg-1). Alfisols showed maximum P-fixation capacity (92.7%), followed by Vertisols (86.5%) and Inceptisols (76.6%) at 50 mg kg-1 added P. However, K fixation increased with increasing levels of added K up to 200 mg kg-1, and thereafter fixation either decreased or was maintained at similar levels. Vertisols showed higher K fixation than Inceptisols and Alfisols. Fertilizer P requirement per unit increase in available P in soil was highest in Bangalore (3.23) and lowest in Delhi (2.38). Fertilizer K requirement per unit increase in available K in soil was highest in Raipur and Gulbarga (1.75) and lowest in Ranchi (1.28).

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Agriculture-Farming, Production, Technology, Economics
Depositing User:	Library ICRISAT
Date Deposited:	02 Sep 2011 18:27
Last Modified:	02 Sep 2011 18:27
URI:	http://oar.icrisat.org/id/eprint/836
Official URL:	http://dx.doi.org/10.1080/00103620601174080
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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