Nitrogen supplying ability of some Philippine rice soils

Sahrawat, K L (1980) Nitrogen supplying ability of some Philippine rice soils. Plant and Soil, 55 (2). pp. 181-187. ISSN 0032-079X

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Abstract

The nitrogen-supplying power of eight Philippine rice soils was measured by consecutively growing six crops of IR 32 rice under flooded conditions in a greenhouse pot experiment. The dry matter yields or nitrogen uptake of rice were found to be highly positively correlated with the organic carbon and the total nitrogen contents of the soils, as well as with the amounts of ammonium released during an anaerobic incubation test at 30°C for 2 weeks. The results of the study bring out the usefulness of simple tests like organic carbon content and total nitrogen content of soils for predicting the nitrogen-supplying power to lowland rice.

Item Type: Article
Divisions: UNSPECIFIED
CGIAR Research Programs: UNSPECIFIED
Uncontrolled Keywords: Direct distillation, Dry matter, H2O2-oxidisable N, Mineralizable N, N uptake, Organic carbon, Soils, Total N
Subjects: Others > Soil Science
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 15 Nov 2011 11:49
Last Modified: 23 Jan 2012 08:16
URI: http://oar.icrisat.org/id/eprint/3955
Official URL: http://dx.doi.org/10.1007/BF02181797
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: The work reported here was carried out under a post-doctoral research fellowship at the International Rice Research Institute, Los Banos, Laguna, Philippines, I am grateful to Dr. F. N. Ponnamperuma, Principal Soil Chemist, for his valuable suggestions during the study as well as during the writing up of the work. Appreciation is also expressed to Mrs. Gloria Rosenberg, Research Editor ICRISAT for critically going through the manuscript.
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