Author(s):

B Bhavana, P Laxminarayana, A Madhavi Latha and T Anjaiah

Abstract: Field experiment was conducted during Kharif, 2018 with an objective to study the possibility of improving N-use efficiency by affecting fertilizer N as per need of crop using leaf colour chart (LCC) transplanted rice. Treatments included two doses of nitrogen (120 and 150 kg ha^-1) applied on basis of LCC- 3 and 4. In turn Nitrogen was applied in 3 equal splits @ 120 kg N ha^-1 and (3 and 4) splits with half as basal, remaining @ 150 Kg ha^-1. These treatments were evaluated against control, recommended method and Farmers practice. Results revealed that, LCC-4 was found to be best in improving efficiency of applied nitrogen fertilizer. Among all the treatments, with regard to nitrogen use efficiency indices, highest efficiency was observed in T₇ {120 kg RDN at LCC 4} followed by recommended practice. LCC based nitrogen application was found to be effective in improving rice yields with limited nitrogen supply on plant need basis.

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