Influence of site specific nutrient management and nutrient omission on yield augmentation of maize (Zea mays) in an acid soil
A field experiment was carried out during the Kharif seasons of 2016 and 2017 on a strongly acidic sandy soil (pH- 5.01 and organic carbon - 4.8 g kg-1) of Sambalpur district in Odisha, India to study the influence of site-specific nutrient management (SSNM) and nutrient omission technique on the productivity of ‘Mahyco-Hybrid 3845 S’ maize under eight treatment combinations consisting of SSNM, three nutrient omissions, one organic, another organic and inorganic amelioration and absolute control. SSNM treated plot showed the highest biomass production (10.9 t ha-1) whereas omission of all NPK resulted in 50.4 % less biomass production. All the major nutrient concentrations i.e., N, P and K were found lowest in their respective omission treatment. It was observed that lime treatment showed the highest Ca content in biomass whereas the lowest in N omitted treatment. Integration of organic alone, with inorganic amelioration and organic-inorganic combination with deficient nutrient resulted in the highest uptake of N, P and K as compared to 100% NPK. SSNM practices improved the soil fertility status and raised the net income and B: C ratio.
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