Effect of Nitrogen, Phosphorus and Potassium Levels on Yield and Economics of Interspecific Hybrid Cotton (Gossypiumspp) under Southern Dry Zone of Karnataka
H. M. Honnappa *
Department of Agronomy, University of Agricultural Sciences, Bengaluru-560065, India.
B. G. Shekara
Department of Agronomy, University of Agricultural Sciences, Bengaluru-560065, India.
Manjanagouda S. Sannagoudar
Division of Grassland and Silvi-Pasture Management, ICAR-Indian Grassland and Fodder Research Institute, Jhansi-284003, India.
Lokesh Patil
Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Bengaluru-560065, India.
N. Hamsa
Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Bengaluru-560065, India.
*Author to whom correspondence should be addressed.
Abstract
The field experiment was conducted at ZARS, V. C. Farm, Mandya during Kharif season of 2016 and 2017 in Southern Dry Zone of Karnataka to optimize levels of major nutrients for interspecific hybrid cotton. The experiment on nutrient management was laid out in RCBD with three replications using factorial concept involving nitrogen, phosphorus and potassium levels. The results revealed that application of 150 kg N ha-1 recorded significantly higher seed cotton yield (1857 kg ha-1) and net returns (Rs. 46,198 ha-1) compared to application of 100 kg N ha-1. Among the phosphorus levels, significantly higher seed cotton yield (2046 kg ha-1) and net returns (Rs. 54,383) were recorded with application of 75 kg P2O5 ha-1 over application of 50 kg P2O5 ha-1. Among potassium levels, application of 100 kg K2O ha-1 recorded significantly higher seed cotton yield (1942 kg ha-1) and net returns (Rs. 49,608 ha-1) as compared to application of 50 kg K2O ha-1.
Keywords: Hybrid cotton, seed cotton yield and economics.