Soil Test Based Fertilizer Recommendations for Targated Yields of Rabi Maize (Zea Mays) in Vertisols of Telangana State
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 4
Abstract
Investigations were carried out on Response of Maize (Zea mays L.) grain yield (kg/ha) and ratio (kg/kg) to the nutrients applications in Telangana state (Soil Test Crop Response Correlation) during 2008 and 2009 at Regional Agricultural Research Station, Warangal. The experiment were 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 correlation coefficients between grain yield and nutrients were significant with N P K uptake, their supply through fertilizers and soil N and K but not P in the two years. The basic data to produce one quintal of grain was estimated at 1.86 kg N; 1.23 kg P and 0.50 kg K in the first year while it was 2.10 kg N, 1.03 kg P and 0.54 kg K in the second year. The soil and fertilizer efficiency was almost equal to contribute nitrogen while the soil was more efficient to supply P than the fertilizer and the efficiency of the soil to supply K was less than the fertilizer during two year. The targeted yield equations developed from these basic data were 2008 2009 FN = 6.60T – 0.95 SN FN = 9.40 T – 1.32 SN FP = 5.54 T – 16.07 SP FP = 2.81 T – 8.93 SP FK = 2.99T – 0.12 SK FK = 3.37 T – 0.18SK The ready reckoner for targeted yield of 40, 50 and 60 q/ha maize grain yield exhibited considerable variation in the prescription of fertilizers for given soil available nutrients. Hence composite targeted yield equation was developed as mean of two years as per the Project Directorate on All India Coordinated Research projection for Soil Test Crop Response Correlation as. FN = 7.27 T= 1.09 SN FP = 3.84 T– 11.63 SP FK = 3.17 T– 0.15 SK The ready recokoner for a range of soil test available NPK are furnished. These are to be verified in the farmer’s fields on sandy loam soils of Central Telangana Zone for recommendations.
Authors and Affiliations
G. Veeranna, T. Srijaya
Keywords
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