Current Science

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A case study was undertaken at the Honnavalli micro-watershed of Hassan district, Karnataka, India, to prepare digital maps for site-specific fertilizer recommendations for the major crops (paddy and maize) using STCR approach. The map shows that the recommended dose of N fertilizer for paddy is 148, 111, 82, 54, 26, –8, –67 and –108 kg ha–1 for the soil available N status 500 kg respectively. Similarly, for maize it is 290, 286, 283, 281, 279, 276, 268 and 259 kg ha–1 for 500 kg ha–1 respectively. Therefore, the study has implications on reducing consumption of fertilizers (24–45% for N; 12–15% for P and 8–32% for K), thereby reducing the cost of cultivation besides achieving higher nutrient use efficiency.

Keywords

Fertilizer Recommendations, Micro-Watershed, Paddy, Maize, Soil Nutrients, Targeted Yield.
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