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Assay of nitrogen supplying capacity of tropical rice soils

OAR@ICRISAT

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Relation http://oar.icrisat.org/3961/
http://dx.doi.org/10.1007/BF02376809
 
Title Assay of nitrogen supplying capacity of tropical rice soils
 
Creator Sahrawat, K L
 
Subject Soil Science
Fertilizer Appications
 
Description The nitrogen supplying capacity of 39 wetland rice soils evaluated by two anaerobic incubation methods and six chemical methods was compared with N uptake of IR 26 rice grown on these soils under flooded conditions in a greenhouse pot study. The uptake of N by rice correlated highly with the N supplying capacity determined by anaerobic incubation methods involving incubation of soils at 30°C for 2 weeks (r=0.84**) or at 40°C for 1 week (r=0.82**) as well as with the organic carbon (r=0.82**) and total N (r=0.84**) contents of soils. Among the chemical indexes, available N determined by the oxidative release of soil N by alkaline permanganate, acid permanganate, acid dichromate and hydrogen peroxide also provided good index of soil N availability to rice. According to these results soil organic carbon and total N contents seem to be good indexes of available nitrogen in tropical wetland rice soils.
 
Publisher Kluwer
 
Date 1982
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3961/1/Plant_and_Soil_65_111-121_%281982%29..pdf
Sahrawat, K L (1982) Assay of nitrogen supplying capacity of tropical rice soils. Plant and Soil, 65 (1). pp. 111-121. ISSN 0032-079X