Modelling Crop Diversification Strategies for Sustainable Intensification in Dryland Cropping System of Semi-Arid Southern India
Ranganath Lakshmaiah, Ernst-August Nuppenau, Stephanie Domptail
Justus-Liebig University Giessen, Inst. of Agric. Policy and Market Res., Germany
Agriculture intensification in dryland cropping systems has relied upon adoption of crops with high yielding varieties and external chemical fertilisers. This intensification further coupled with declining land size has led to increase in monocropping and has completely disregarded potential of crop diversification as soil fertility management strategy. Legume-based crop diversification with appropriate input management strategy have proven to increase the productivity of the soil based on long-run field level experiments. However, in short-run, farmer adopting a legume-based rotation must forgo returns from relatively high remunerative cereal crop for less remunerative legume crop. Any recommended crop diversification strategy must inform farmer on this trade-off in short-run and appropriate input management strategies in cropping system for sustainable long-run benefit. In this study, we model adoption of legume based cropping patterns as a part of field level sustainable intensification strategy for dryland agriculture from economic point in semi-arid region of southern India. Sustainable intensification of dryland cropping systems is defined as efficient allocation of external inputs (non-renewable resources) and temporal choice (long-run) of crops over finite period for given output, factor prices and crop yield levels.
Keywords: Cropping system, soil fertility management, sustainable intensification
Contact Address: Ranganath Lakshmaiah, Justus-Liebig Universität Gießen, Inst. for Agricultural Policy and Market Research, unterhof, 35392 Gießen, Germany, e-mail: ranga.lakigmail.com