Fixed ammonium and carbon-nitrogen ratios of some semi-arid tropical Indian soils

Sahrawat, K L (1995) Fixed ammonium and carbon-nitrogen ratios of some semi-arid tropical Indian soils. Geoderma, 68 (3). pp. 219-224. ISSN 0016-7061

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Abstract

The distribution of fixed NH4-N and C:N ratios of soil profiles from two benchmark Vertisols and one Alfisol in India was studied. From 15.9 to 58.6% of the total soil N was present as fixed NH4-N in the Vertisol profiles; the range was from 13.3 to 30.8% in the Alfisol profile and a higher percentage of fixed NH4-N was found in the lower horizons. A method based on the extraction of soil samples with dilute HF solution was suitable for determining fixed NH4-N in these soils. Organic C:total N ratios varied from 7.7 to 12.8 in the three profiles while the organic C:organic N ratios varied from 9.4 to 21.4. The results emphasize the importance of fixed NH4-N in assessing the N-status of the soils

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Soil Science Others > Fertilizer Applications
Depositing User:	Mr B K Murthy
Date Deposited:	17 Nov 2011 03:34
Last Modified:	17 Nov 2011 03:34
URI:	http://oar.icrisat.org/id/eprint/3976
Official URL:	http://dx.doi.org/10.1016/0016-7061(95)00031-I
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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