Diagnosis and Recommendation Integrated System (DRIS) Norms for Identifying Yield Limiting Nutrients in Byadgi Chilli Fruits Grown in Northern Transitional Zone and Dry Zones of Karnataka (India)
M. Pushpalatha *
Department of Soil Science and Agricultural Chemistry, College of Agriculture, UAS, Dharwad, India.
B. I. Bidari
Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad, 580005, India.
M. Hebbara
Department of Soil Science and Agricultural Chemistry, Institution of Organic Farming, MARS, Dharwad-580005, India.
G. B. Shashidar
Department of Agronomy, College of Agriculture, University of Agricultural Sciences, Dharwad, 580005, India.
B. Savita
Department of Soil Science and Agriculture Chemistry, KVK, Indi, Vijayapura, India.
S. T. Hundekar
Department of Horticulture College of Agriculture, University of Agricultural Sciences, Dharwad, 580005, India.
R. V. Hegde
Department of Horticulture College of Agriculture, University of Agricultural Sciences, Dharwad, 580005, India.
*Author to whom correspondence should be addressed.
Abstract
Fruit samples collected from different part of northern Karnataka districts of Dharwad, Gadag and Haveri, when peak fruit harvesting stage were collected the samples, were processed and analysed for various nutrients and thus, the data bank was established. By using Diagnosis and Recommendation Integrated System (DRIS), nutrient expressions, which have shown higher variance and lower coefficient of variation, were selected as norms viz, N/P(4.98), N/K (0.73), N/Ca (1.17), N/Mg (4.65), S/N(0.10), N/Fe(0.02), N/Zn(0.08) etc. In addition, five nutrient ranges have been derived using mean and standard deviation as low, deficient, optimum, high and excess for each nutrient to serve as a guide for diagnostic purpose. The optimum N ranged from 2.30 to 2.84%, P from 0.48 to 0.56%, K from 3.16 to 3.44%, Ca from 2.08 to 2.74%, Mg from 0.60 to 0.88% and S from 0.24 to 0.27%. Among the micronutrients, the optimum Zn ranged from 28.71 to 29.78 ppm, Fe from 113.60 to 150.03 ppm for byadgi chilli crop.
Keywords: Diagnosis and recommendation integrated system, nutrient, micronutrients, chilli crop