Asian Journal of Soil Science and Plant Nutrition

A field experiment was carried out during Kharif 2022-23 at Integrated Farming System demonstration unit, L-block, GKVK, Bengaluru, consisting 11 treatments replicated thrice and laid out in Randomized Complete Block Design. The treatments consisted of T₁-(No nitrogen), T₂-Nitrogen management as per package of practices (UASB), T₃-50%RDN+foliar spray of nano-N at 30 and 50 DAS, T₄-50%RDNP+ foliar spray of nano-NP at 30 and 50 DAS, T₅-Foliar spray of only nano-N at 30, 50 and 70 DAS, T₆-Foliar spray of only nano-NP at 30, 50 and 70 DAS, T₇-25%RDN+foliar spray of nano-N at 30, 50 and 70 DAS, T₈-25%RDNP+foliar spray of nano-NP at 30, 50 and 70 DAS, T₉-100% RDN+NDVI based nano-N spray, T₁₀-100% RDN+NDVI based nano-NP spray and T₁₁-100% RDN+NDVI based conventional urea spray. The results revealed that application of 100%RDN+NDVI based nano-N spray recorded higher plant height (229.3 cm), number of leaves at 90 DAS (15.76), dry matter production (354.9 g plant^-1), GreenSeeker reading at 30, 50 and at 70 DAS after spray (0.43, 0.58 and 0.73, respectively), cob length, cob girth and cob weight (20.5 cm, 5.49 cm and 201.9 g plant^-1, respectively) and higher kernel and stover yield (7729 and 8948 kg ha^-1, respectively)over other treatments and on it was par with 100% RDN+NDVI based conventional urea spray and 100% RDN + NDVI based nano NP spray.