EFFECT OF GRADED LEVELS OF POTASSIUM ON CONTENT AND UPTAKE OF NUTRIENTS BY IRRIGATED MAIZESrinivasa, D.K., Chikkaramappa, T., Prashantha, G.M., Vijay Kumar, C., Shreenivas, B.V. and Anand Naik
A study was conducted at Zonal Agricultural Research Station V.C. farm, Mandya to know the effect of graded levels of potassium on content and uptake of nutrients by irrigated maize. Maize was grown during kharif season of 2012. The results indicated that the content and uptake of nutrients were significantly varied among the treatments. Higher nitrogen, potassium, sulphur and zinc content in leaf at 45 DAS and after harvest of the maize were recorded with the application of recommended NP + 125 per cent of recommended K in 2 splits and higher content of phosphorus, calcium and magnesium at 45 DAS and at harvest of maize were reported in treatment receiving recommended NPK as per UAS (B) package. Uptake of N and K by maize was significantly higher in recommended NP+ 125 per cent recommended K in 2 splits and phosphorus uptake was more with 100 per cent NPK. Grain and straw yield of irrigated maize was higher in the treatment receiving recommended NP + 125 per cent of recommended K in 2 splits. Soil properties after harvest of irrigated maize were recorded high in 100 per cent NPK application compare to other graded levels of potassium.
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