Balanced Fertilizer Prescription for Big Onion through Inductive Cum Targeted Yield Model on an Alfisol

Abstract

Field experiments were conducted on Typic Ustropept (Irugur soil series) soil of Southern Zone of Tamil Nadu by adopting the inductive cum targeted yield model, and fertilizer requirements were quantified for big onion based on soil test and yield target. The basic parameters viz., the nutrient requirement (NR) and contribution of nutrients from the soil (Cs ), fertilizer (Cf ), and farmyard manure (Cfym) were computed from the field experimental data. The fertilizer prescription equations were developed based on the basis of an integrated plant nutrition system (IPNS), and nomograms for the desired yield target of big onion for a range of soil test values. The extent of saving of inorganic fertilizer for big onion was computed using the fertilizer prescription equations under IPNS. The estimates showed that for the application of FYM @ 12.5 t ha-1 with 28 per cent moisture and 0.528, 0.286 and 0.520 per cent of N, P and K respectively when applied along with the N, P and K fertilizers as per soil test and desired yield target, the saving was 40, 20 and 33 kg of fertilizer N, P2O5 and K2O respectively

DOI

https://doi.org/10.29321/MAJ.2019.000322

Pages

624 - 632

Creative Commons

Copyright

© The Author(s), 2026. 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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