Study of variable nutrient responses in cotton grown in Vertisols of North-Eastern Karnataka

A study wan undertaken with the objective of To characterize and assess fertility status of soils in intensive cotton and soybean growing areas of North-Eastern region in Karnataka To study the response of cotton and soybean to major nutrients and assess the extent of spatial variability of yield responses in the study region To study the nutrient uptake pattern, nutrient use efficiency and residual soil fertility through nutrient omission technique To create awareness among farmers for optimized nutrient use and best nutrient management practices for cotton and soybean in Vertisols

IPNI-2015-IND-534

Cotton is intensively cultivated in the north eastern dry zone of Karnataka. The production area for this crop has been increasing over the past half a decade, while the on-farm productivity is declining. The current investigation studied the response of cotton to nutrient omissions and site-specific nutrient management (SSNM) in the farmers' fields during the monsoon season of 2016 at Raichur, Karnataka. The soils of the experimental sites were deep black, alkaline (pH 7. 5 to 8. Read more


Year of initiation:2015
Year of completion:2016

Interpretive Summary

2016

Cotton is intensively cultivated in the north eastern dry zone of Karnataka. The production area for this crop has been increasing over the past half a decade, while the on-farm productivity is declining. The current investigation studied the response of cotton to nutrient omissions and site-specific nutrient management (SSNM) in the farmers' fields during the monsoon season of 2016 at Raichur, Karnataka. The soils of the experimental sites were deep black, alkaline (pH 7. 5 to 8.

2015

The current investigation was aimed at determining the variable nutrient responses in cotton grown on the Vertisols of north-eastern Karnataka. The study was initiated at 10 on-farm sites covering three villages in the Raichur District where the soils are medium black to deep black in nature. Soils of the experimental sites were alkaline in pH (7. 5 to 8. 4), low to medium in organic C (0. 4 to 0. 6%), low in available N (70 to 235 kg/ha), medium to high both in available P2O5 (42.



Project Leader

Anand Naik, University of Agricultural Sciences, Raichur


Project Cooperators

Dr. Pandit S. Rathod, Scientist, AICRP Chickpea, ARS, Kalaburagi
Dr. M. A. Bellakki, Assistant Professor (Soil Scence), ARS, Kalaburagi


IPNI Staff

T. Satyanarayana


Location

Asia \ Southern Asia \ IND \ Karnataka \ Kalaburagi


Topics

4r rate, 4r time, balanced nutrition, decision support

Nitrogen (N), Phosphorus (P), Potassium (K)