Studies so far show that the right combination of species in the right setting can consistently yield more together then the same species grown singly on the same plot. The clover supplies nitrogen, provides living mulch, protects soil and water, and creates habitat for insects that prey on crop pests. Plant diversity in a field not only lowers the risk of complete crop failure but also preserves a level of natural pest control that helps reduce losses to insects. It can also help sustain productivity by preventing soil deterioration. In any multi-crop system, of course boosting output depends on picking the right combination of species.
Researches say that by practising organic farming many harmful situations can be avoided.
Organic farming consists in a production system, which avoids or excludes the use of synthetically compounded fertilizers, pesticides, growth regulators, and livestock feed additives. This system relies upon crop rotations, crop residues, animal manures, legumes, green manures, farm organic wastes, mechanical cultivation, mineral-bearing rocks, and aspects of biological pest control to maintain soil productivity, to supply plant nutrients, and to control insects, weeds and other pests. Sustainable Agriculture is also being put into practice. It is a philosophy based on human goals and on understanding the long - term impact of our activities on the environment and on other species. Use of this philosophy guides our application of prior experience and the latest scientific advances to create integrated, resource conserving, equitable farming systems.