Response of Maize (Zea Mays L.) Grain Yield and Ratio to the Nutrients Applications During Rabi in Telangana State

ABSTRACT Investigations were carried out on the Response of Maize (Zea mays L.) Grain yield (kg/ha) and ratio (kg/kg) to the nutrient applications in Telangana state (Soil Test Crop Response Correlation) during 2008 and 2009 at Regional Agricultural Research Station, Warangal. The experiment was conducted at different sites adjacent to each other on a sandy clay loam soil having a low status in available nitrogen (272kg/ha) in the first year and medium (323kg N/ha) in the second year. The soil available phosphorus had a medium status with 60 kg P2O5/ha in the first year and 50. Kg P2O5/ha in the second year. It was rich in available potassium having 719 and 829 kg K2O/ha during the corresponding years. The yield response, increased with the application of fertilizer up to 240 kg N/ha in the three strips during both the years. A mean maximum yield response of 3150 kg /ha grain yield was obtained by the application of 240 kg/ha in 0X fertility gradient. A mean maximum yield response of 1587 kg/ha was also obtained by the application of 120 kg P2O5g/ha in this fertility gradient. The maximum response of 577 kg grain yield was obtained by the application of 120 kg K2O/ha in the 1 X fertility gradient. The response ratio was also altered by the level of fertilizer and fertility gradient. Mean maximum yield response ratio was 13.12 kg grain/kg N at 240 kg N/ha and 13.22 kg grain/kg P at 120 kg P2O5/ha in the 0 X fertility gradient. But the mean maximum response ratio of 4.81 kg/kg K was obtained by the application of 120 kg K2O/ha in 1 X fertility gradient.