Enhancing Soybean (Glycine max L. Merrill.) Productivity through Varied Phosphorus Levels and Foliar Application of Nano-DAP

Authors

  • H. K. Shivu Dept. of Agronomy, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India
  • G. Somanagouda Dept. of Agronomy, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India https://orcid.org/0009-0002-9401-2039
  • S. R. Salakinkop Dept. of Agronomy, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India
  • U. Roopa Dept. of Food Science and Nutrition, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India
  • Nagesh Rathod Dept. of Agronomy, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India
  • R. Channakeshva Dept. of Entomology, College of Agriculture, Main Agriculture Research Station, University of Agricultural Sciences, Dharwad, Karnataka (580 005), India

DOI:

https://doi.org/10.23910/1.2026.6524

Keywords:

Enhancing Soybean (Glycine max L. Merrill.) Productivity through Varied Phosphorus Levels and Foliar Application of Nano-DAP

Abstract

A field experiment was conducted at AICRP on soybean, MARS, UAS, Dharwad, Karnataka during kharif, 2023 (July to October) to study the response of soybean through varied phosphorus levels and foliar application of Nano-DAP. The experiment was replicated thrice in a split-plot design with three main plots and four subplots. Application of 100% recommended dosage of phosphorus. recorded significantly higher plant height (42.15 cm), number of branches plant-1 (6.73), leaf area (12.23 dm2 plant-1), leaf area index (4.07), total dry matter accumulation/plant (28.78 g), SPAD value (50.10), number of nodules (47.08 plant-1), number of pods (45.26 plant-1), seed yield plant-1 (15.88 g), 100 seed weight (15.20 g), seed yield (2564 kg ha-1), haulm yield (3222 kg ha-1), net returns (` 84,517 ha-1) and B-C ratio (2.94) over 75% recommended dosage of phosphorus and control. Among foliar nutrition, foliar application of Nano-DAP @ 4 ml l-1 at 30 and 45 DAS recorded significantly higher plant height (39.77 cm), number of branches plant-1 (6.34), leaf area (11.20 dm2 plan-1), leaf area index (3.75), total dry matter accumulation plant-1 (26.27 g), SPAD value (47.92), number of nodules (40.60 plant-1), number of pods plant-1 (41.86), seed yield plant-1 (14.55 g), 100 seed weight (14.74 g), seed yield (2330 kg ha-1), haulm yield (2922 kg ha-1), net returns (` 71,513 ha-1) and B-C ratio (2.59) over no foliar applications. Among the interaction effects, application of 100% RDP+foliar application of Nano-DAP @ 4 ml l-1 at 30 and 45 DAS (M1S3) recorded significantly higher productivity, quality parameters and economic returns of soybean crop.

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Published

2026-01-24

How to Cite

1.
Shivu HK, Somanagouda G, Salakinkop SR, Roopa U, Rathod N, Channakeshva R. Enhancing Soybean (Glycine max L. Merrill.) Productivity through Varied Phosphorus Levels and Foliar Application of Nano-DAP. IJBSM [Internet]. 2026 Jan. 24 [cited 2026 Jul. 18];17(Jan, 1):01-12. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/6524

Issue

Vol. 17 No. Jan, 1 (2026)

Section

Articles

License

Copyright (c) 2026 H. K. Shivu , G. Somanagouda, S. R. Salakinkop, U. Roopa, Nagesh Rathod, R. Channakeshva

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