Food legumes in cropping systems and farmers participatory approaches

Food legumes or pulses are an important component of cropping systems and provide an opportunity to increase food supplies, particularly in the developing world, in a sustainable way, through intensifying and diversifying agricultural systems. Food legumes are more positive crops, in terms of resource conservation, than cereals and a rotation of food legumes with cereals makes cereal production more economic and sustainable. In the developing world legumes is a major source of nutrition for the poor. However, in the past three decades the production of food legumes has-gradually fallen in comparison , with a rapid growth in cereals, and livestock products. Yields of the majority of the legumes have stagnated as they have been relegated to more marginal and unfavorable environments; and no major yield breakthroughs have been apparent . Concurrently, the first generation of Green Revolution Technologies used to increase food production are being reduced in effectiveness and have become unable economically to sustain the present, or desired increased levels in productivity. This is due, in part, to the increasing dominance of monocropping with cereals and the subsequent displacement of legumes. The role of food legumes as a key component of second-generation green revolution technologies is therefore crucial and timely. Large variations in yields are presently experienced which is compounded by intense biotic and abiotic stresses, and an inadequate supporting policy environment. We review the potential role of legumes in cropping systems in developing countries and make little effort to distinguish between cool and warm-season pulses as trends in supply and demand have been similar and most factors influence both types of pulses. Recent examples of diversification of cereal based cropping system emphasizing farmer participatory approaches are discussed