Abstract
A field study on soil test-based optimum integrated plant nutrients supply based on soil test crop response (STCR) approach was conducted during 2016–2017 in Mollisols of Norman E. Borlaug Crop Research Centre, G.B. Pant University of Agriculture and Technology, Pantnagar. The objective of the study was to develop fertilizer recommendation equation for the desired yield target of finger millet crop. The basic parameters, namely nutrients required for producing one quintal of grain, contribution of nutrients from soil, fertilizers, and farm yard manure (FYM), were estimated from the field experimental data to develop fertilizer prescription equations under integrated plant nutrition supply system. It was observed that response of finger millet to nitrogen (N), phosphorus (P) and potassium (K) fertilizers was higher when integrated with FYM application as compared to NPK alone. The contribution of N, P and K from FYM @ 5 t ha−1 was 21.84, 4.56 and 56.84%, respectively. The fertilizers N, P and K required for producing a yield target of 40 q ha−1 were 33.74, 6.04 and 24.27 kg ha−1, when applied along with 5.0 t ha−1 FYM based on soil test values of 125, 15 and 125 kg ha−1 of KMnO4-N, Olsen-P and NH4OAc-K, respectively. When N, P and K fertilizers were combined with FYM (5.0 t ha−1), the savings in fertilizer inputs were 24.4, 18.8 and 45.2% over NPK alone, respectively. Per cent reduction in NPK fertilizers under FYM also increased with increasing soil fertility levels with reference to NPK. A ready reckoner of fertilizer prescription was developed for a range of soil test values and targeted yield of finger millet for inorganic fertilizer with and without FYM.
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The authors are grateful to G.B. Pant University of Agriculture and Technology, Pantnagar, for providing financial support and necessary research facilities during the course of the investigation.
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Ayushi conducted the experiments and prepared the manuscript; Srivastava A supervised the experiments, Singh VK assisted in drafting and revising the manuscript; Sen S assisted in drafting and revising the manuscript; Singh V helped in data interpretation.
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Ayushi, Srivastava, A., Singh, V.K. et al. Soil Test-Based Optimum Integrated Plant Nutrient Supply for Attaining Targeted Yield of Finger Millet in Mollisols of Northern India. Agric Res 11, 87–94 (2022). https://doi.org/10.1007/s40003-021-00543-1
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DOI: https://doi.org/10.1007/s40003-021-00543-1