Ammonium fixation in some tropical rice soils

Sahrawat, K L (1979) Ammonium fixation in some tropical rice soils. Communications in Soil Science and Plant Analysis, 10 (7). pp. 1015-1023. ISSN 0010-3624

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Abstract

The ammonium-fixing capacity of 12 tropical rice soils was studied by treating 10 g soil samples with 50 mg ammonium (as sulphate) in 20 ml water, equilibrating for 2 h by continuous shaking and then extracting ammonium with 2 M KCl. The ammonium-fixing capacity ranged from 3.8 to 7.7 meq/100 g soil. Fixation was not related to pH, OM or clay content but was correlated with the amount of active Fe. Because of the reversible oxidation and reduction of iron oxides in rice soils, this mechanism may be of special importance.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Ammonium fixing capacity, ammonium fixation and soil properties, active iron
Subjects:	Others > Soil Science Others > Fertilizer Applications
Depositing User:	Mr B K Murthy
Date Deposited:	01 Dec 2014 08:58
Last Modified:	01 Dec 2014 08:58
URI:	http://oar.icrisat.org/id/eprint/8382
Official URL:	http://dx.doi.org/10.1080/00103627909366958
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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