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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(11): 1030-1036
DOI: https://doi.org/10.20546/ijcmas.2017.611.120


Calibrating the Leaf Colour Chart for Nitrogen Management in Maize (Zea mays L.) under Irrigated Condition
Shivakumar1, M.A. Basavanneppa2*, B.G. Koppalkar1, M.R. Umesh1 and Ashok Kumar Gaddi2
1Department of Agronomy, University of Agricultural Sciences, Raichur, Karnataka, India
2Agricultural Research Station, Siruguppa- 583 121, Karnataka, India
*Corresponding author
Abstract:

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.


Keywords: Grain yield, Nitrogen management, Leaf colour chart and economics.
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How to cite this article:

Shivakumar, M.A. Basavanneppa, B.G. Koppalkar, M.R. Umesh and Ashok Kumar Gaddi. 2017. Calibrating the Leaf Colour Chart for Nitrogen Management in Maize (Zea mays L.) under Irrigated Condition.Int.J.Curr.Microbiol.App.Sci. 6(11): 1030-1036. doi: https://doi.org/10.20546/ijcmas.2017.611.120