Assessment of Nutrient Contribution towards Yield of Bt Cotton through Omission Plot Techniques in Karnataka

The project was initiated to assess the yield responses to N, P and K fertilizer application in different Bt cotton growing farmer fields and also understand the extent of indigenous nutrient supplying capacity of soils. This information will help develop the QUEFTS for Bt cotton and will contribute to development of Nutrient Expert Cotton for South Asia.

IPNI-2013-IND-524

The current project was aimed at assessing the yield response of cotton to applications of N, P2O5, and K2O and to determine the extent of spatial and temporal variability of nutrient responses across the cotton-growing soils of northern Karnataka. On-farm nutrient omission plot experiments were conducted in farmers’ fields at 15 locations in the intensive cotton-growing districts of Belgaum and Dharwad, varying in soil types from red laterite to medium black, and deep black soils. Read more


Year of initiation:2013
Year of completion:2015
Map:

Interpretive Summary

The current project was aimed at assessing the yield response of cotton to applications of N, P2O5, and K2O and to determine the extent of spatial and temporal variability of nutrient responses across the cotton-growing soils of northern Karnataka. On-farm nutrient omission plot experiments were conducted in farmers’ fields at 15 locations in the intensive cotton-growing districts of Belgaum and Dharwad, varying in soil types from red laterite to medium black, and deep black soils.

The current project was aimed at assessing the yield responses to applied nutrients and understanding the extent of spatial and temporal variability of nutrient responses across the cotton-growing soils of northern Karnataka. On-farm nutrient omission plot experiments were conducted in farmers’ fields at 17 locations in the intensive cotton-growing districts of Gadag, Belgaum and Dharwad, varying in soil types from red, laterite to medium black and deep black soils.

On-farm studies were initiated in farmer fields of northern Karnataka where transgenic cotton is grown. The objectives of this study were to assess the yield responses to applied nutrients and understand the extent of indigenous nutrient supplying capacity of soils. Experiments were conducted at 30 farms in six different districts (Dharwad, Gadag, Haveri, Belgaum, Bijapur, and Bagalkot) of northern Karnataka, with soil types varying from medium black to deep black.

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Project Leader

Y. R. Aladakatti, University of Agricultural Sciences


Project Cooperators

Dr. D. P. Biradar, University of Agricultural Sciences, Raichur
Dr. Yogesh Kumar Singh, Agronomist, CIMMYT
Dr. S. K. Pattanayak, Professor, Soil Science, OUAT


IPNI Staff

T. Satyanarayana


Location

Asia \ Southern Asia \ IND \ Karnataka \ Dharwad


Topics

4r rate, 4r source, 4r time, nutrient management, yield

cotton

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