Madras Agricultural Journal
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COMPARATIVE EFFICIENCY OF DIFFERENT SOURCES OF NITROGEN ON RICE IN CLAYLOAM SOILS OF CAUVERY DELTA

Abstract

Field experiments were conducted in clay loam soils of Cauvery delta to evaluate the efficiency of different N sources on rice during kuruvai and thaladi seasons of 1984 and 1985. Application of lac coated urea was beneficial in recording higher grain yield, N use efficiency as well as N uptake by the crop over ordinary urea during kuruvai season. Application of green manure during thaladi season needed higher dose of fertilizer N at planting to get higher yield of rice. Application of Urea super granule recorded the highest N use efficiency during thaladi season. The uptake of N by the crop was higher with the use of urea super granule, lac coated urea as well as green manure + urea.

Keywords: Nitrogen sources, N use efficiency, N uptake, Rice.

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Tamil Nadu Agricultural University
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Tamil Nadu Agricultural University
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ISSN : 0024-9602
eISSN : 2582-5321

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