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Aim: To investigate the impact of biochar as component of integrated nutrient management on nutrient uptake by tomato in acid soil of Meghalaya, North East India. Methodology: A field experiment was conducted at research farm of SNRM, College of Post Graduate Studies in Agricultural Sciences (CPGS-AS), Central Agricultural University (CAU-I), Umiam during rabi 2017-18 taking tomato, cv. Megha Tomato-2 as test crop. Sixteen treatment combinations of recommended closes of fertilizers, biochar and vermicompost? were tested in RBD with three replications.? Results: The experimental results revealed that combined application of biochar, fertilizers and vermicompost increased the uptake and availableof N, P, K, Fe, Zn, Mn and Cu over graded doses of biochar + fertilizers, biochar alone and control. Electrical conductivity, bulk density, exchangeable acidity, exchangeable aluminium and acid saturation followed the same trend.? Interpretation: The 100% RDF + biochar 4 t ha-1 + vermicompost @ 2.5 t ha-1 is the most appropriate combination for increasing tomato productivity and improving soil health of acidic soil in Meghalaya.

Agro-ecosystems sustainability is largely determined by its economic viability and its impacts on the environment and society as a whole. The efficient management of on-farm resources in integration with natural biogeochemical cycles broadens the natural resource base for economic agriculture, and enhances environmental quality. Sustainably managing natural resources also envisages exploring intricate linkages among biophysical, technological, social-economic and environmental factors. For sustainably enhancing growth in agriculture production, there is a need to increase resource use efficiency by integration of agronomy with natural biogeochemical cycles for conserving resources, and to innovate to create efficient technologies for precise application and use of resources. In any case the the solutions must take care of the urgent environmental concerns on priority basis.