National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The field experimentwas conducted at Agricultural Research Station, Siruguppa, University of Agriculture Sciences, Raichur, Karnataka, during kharif 2016 to study the “Calibrating the leaf colour chart for maize (Zea mays L.) nitrogen management under irrigated condition” and to evaluate and establish LCC threshold values for saving fertilizer N and achieve higher grain yield. The experimental site was medium deep black soil. The experiment consists of ten treatments viz., T1: N application at LCC threshold ≤ 1, T2: N application at LCC threshold ≤ 2, T3: N application at LCC threshold ≤ 3, T4: N application at LCC threshold ≤ 4, T5: N application at LCC threshold ≤ 4.5, T6: N application at LCC threshold ≤ 5, T7: N application at LCC threshold ≤ 5.5, T8: N application at LCC threshold ≤ 6, T9: RDN (190 kg ha-1) and T10: Absolute control. These treatments were replicated thrice in Randomized Complete Block Design (RCBD). Application of nitrogen fertilizer based on LCC threshold ≤ 5 recorded higher grain yield (8339 kg ha-1), stover yield (10424 kg ha-1) and harvest index (44.4%). Net returns (Rs. 80650) and B:C ratio (2.88) were recorded in N application at LCC threshold ≤ 5.
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