Modelling the long-term productivity and soil fertility of maize/millet cropping systems in the mid-hills of Nepal

Economic analysis showed that, at current prices, the use of inorganic fertilisers was by far the most rational option for farmers in terms of net returns, regardless of the site, and despite the associated decline in soil C and N levels. It was estimated that if greater use of organic manure is to be promoted as a way of increasing carbon sequestration in the soil, then farmers in the mid-hills of Nepal will need to be compensated at a rate of at least US$9.90 (t C)−1 for the lower crop yields they will obtain.