Potentially mineralizable nitrogen in West African lowland rice soils

Narteh, L T and Sahrawat, K L (1997) Potentially mineralizable nitrogen in West African lowland rice soils. Geoderma, 76 (1-2). pp. 145-154. ISSN 0016-7061

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Abstract

Potentially mineralizable N, as a measure of N supplying capacity, was determined employing an anaerobic incubation test in 15 diverse soils from 5 major rice producing countries in the title area. Mineralized N contents of the soils varied (21 to 166 mg/kg of soil) and the ammonium N released constituted 2 to 7% of the total N. Mineralized N was significantly correlated with pH, organic C, total N, clay and CEC but not with extractable iron and C:N ratio of the soils. Multiple regression analysis of mineralized N with soil characteristics showed that inclusion of C:N ratio and extractable iron improved the prediction of mineralized N. The results underscore the importance of organic matter (organic C and total N) in controlling potentially mineralizable N in wetland rice soils. The main soil factors affecting N mineralization, identified by principal components analysis, accounted for >97% variation in potentially mineralizable N in the soils

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Soil Science
Depositing User:	Mr B K Murthy
Date Deposited:	17 Nov 2011 03:33
Last Modified:	17 Sep 2013 11:20
URI:	http://oar.icrisat.org/id/eprint/3980
Official URL:	http://dx.doi.org/10.1016/S0016-7061(96)00097-3
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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