Correlation studies of Bt cotton in Jewargi Taluka, Kalaburagi district

Abstract

A study was undertaken in Bt cotton growing soils of Jewargi taluka of Kalaburagi district in 2017-18 to study the correlation between nutrient status and spectral characteristics of Bt cotton the results revealed that the normalized difference vegetation index values was significant and positive correlation with petiole nitrogen and phosphorus while it had a significant negative correlation with only petiole manganese. However, other nutrients content in petiole like K, Ca, Mg, S, Fe, Cu and Zn were showed the non significant relation. Available nitrogen had significant and positive correlation with nitrogen, phosphorus and sulphur in leaf petiole. The available phosphorus had significant and positive correlation with phosphorus in leaf petiole while it had negative significant relation with the calcium, copper and zinc Available iron has non-significant relation with P, Mg, S and Zn content in leaf petiole.