Vol. 12, Issue 9 (2023)

Author(s):
Chinnappa SA, Krishnamurthy D, Ajayakumar MY, Ramesha YM and Ravi S

Abstract:
A field experiment was conducted during kharif 2022 at ARS, Hagari to study the effect of nano fertilizers on growth and yield of kharif sorghum. There were ten treatments consisting of different doses of RDF (four treatments with 50% RNP, four with 75% RNP, one with 100% RDF and one absolute control) with different doses of nano urea and DAP sprayed at 30 & 45 DAS. Results revealed that application of 75% RNP as basal + nano urea & DAP spray @ 1.5 ml l^-1 each at 30 and 45 DAS has produced significantly higher plant height and dry matter accumulation. It has resulted in enhanced grain yield (3281 kg ha^-1) by 120.6% over absolute control (1487 kg ha^-1). It was profitable too in terms of higher net returns (Rs. 84,319 ha^-1) and B C ratio (2.99) of sorghum production. Results confirmed that reduced rate of conventional fertilizer can be substituted by foliar application of nano fertilizers to enhance nutrient use efficiency and economics.