Nutrient Mining in Agro-climatic Zones of Chattisgarh

摘要

The new-born chhattisgarh state, comprisig three agro-climatic zones-Chhattisgarh plains, Bastar plateau and Northern hills, is predominantly a tribal state practising subsistence agriculture. In the three agro-climatic regions rice is the principal crop which covers 77% of the net sown area. The productivity of rice ranges from 10.4 to 13.14 q/ha which is very low in comparison to national average and other states. The total production of foodgrains is much greater in Chhattisgarh plains than in Baster plateau and Northern hills. The fertiliser use also follows the same trends as the crop productivity in the three agro-climatic zones. The state also supports a large population of livestock producing 153 lakh tonnes of organic manures. The production of organic manure comes to around 3 t/ha contributing 15 kg N, 6 kg P_2O_5 and 15 kg K_2O/ha. The low crop productivity in the state is currently maintained by the use of available organic manures and small to moderate amounts (9-78 kg/ha) of fertilisers. The low input agriculture may not help the state to prosper and catch up with other developed/developing states. To double the farm productivity and sustain it over long term, it is absolutely necessary to apply adequate amounts of fertiliser N, P, K and other deficient nutrients. Proper collection, processing and enhancing the quality of organic manures, and sue of quality manures and efficient biocultures complementary with fertilisers need greater attention to build up the fertility status of soils which in turn may support large harvests of crops.