Nitrogen Use Efficiency - A Tool for Varietal Selection

Abstract

Field experiment was conducted during pishanam, 2017 (October to January)with 32 numbers of short duration rice varieties / cultures grown in TamilNadu province as main plot and N levels (0, 50, 100 and 150% recommendedN) as subplot in split plot design replicated twice at Rice Research Station,Tamil Nadu Agricultural University, Ambasamudram to delineate and classifyrice varieties into N utilization and responsive classes. The experimental soilwas sandy loam in texture with acidic pH (4.16) had 0.35% organic matter,available nitrogen - 270 kg ha-1, available phosphorus - 10 kg ha-1 andavailable potassium - 63 kg ha-1. The 32 short duration rice varieties usedunder this study were delineated and classified into highly responsive (10),moderately responsive (5), low responsive (7) and non-responsive cultures(10) based on the responsiveness and utilization of applied nitrogen by thevariety. The technique of selection of highly efficient and responsive ricevariety / cultures under low nitrogen input can be used as a tool for cropimprovement programme to evolve better crop variety.

DOI

https://doi.org/10.29321/MAJ.10.000554

Pages

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Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

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