Author(s):

Kumari Prerna Deep, Asha Kumari Sinha, Shashi Bhushan Kumar, Prabhakar Mahapatra, Shikha Verma, Asisan Minz and Madhuri Toppo

Abstract: Crop residues are parts of the plants left in the field after crops have been harvested and threshed. In India there are 500-550 million tonnes (Mt) of crop residues are produces annually. Crop residue incorporation provides the essential nutrients in the soil after its decomposition. Keeping in view of the importance of crop residue, a field experiment was conducted in kharif 2016 on hybrid maize (<em>var</em>. Pioneer – 3377) comprising five treatments with and without crop residue incorporation along with chemical fertilizers, <em>viz</em>. NPK (250:120:120 kgha^-1), N₀PK (0:120:120 kgha^-1), NP₀K (250:0:120 kgha^-1), NPK₀ (250:120:0 kgha^-1) and SSNM (200: 120: 120 kgha^-1) with the objective to determine the response of several fertilizers with crop residue application to maize production and to evaluate their agronomic efficiency (AE) and partial factor productivity (PFP). Results showed that balanced dose of fertilizers application gave highest agronomic efficiency (AE) of applied N, P &amp; K (28.28 and 27.05, 15.90 and 13.08 &amp; 32.25 and 33.03 kg grain kg^-1) followed by SSNM (29.30 and 27.77, 7.75 and 4.01 &amp; 26.60 and 27.55 kg grain kg^-1) in both the situation: with and without crop residues incorporated plots respectively. Minimum agronomic efficiency obtained when improper dose of Chemical fertilizer applied. Maximum partial factor productivity of applied N, P &amp; K under SSNM treatment (37.70 and 35.70, 83.90 and 79.40 &amp; 75.50 and 71.50 kg grain yield kg^-1N, P &amp; K applied respectively) followed by NPK treatment (35.00 and 33.40, 73.00 and 69.60 &amp; 73.00 and 69. 00 kg grain yield kg^-1N, P &amp; K applied respectively) in with and without incorporation of crop residues. Whenever agronomic efficiency and partial factor productivity (PFP) was compared with incorporation of crop residues and without incorporation of crop residues, then both (AE and PFP) were more in crop residues incorporated plots than without incorporation of crop residues.

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