Evaluation of the Effect of Different Crop Rotations on Soil Productivity

Abstract

The maintenance of soil produc- tivity has to be the very basis of a long-term scientific crop husbandry. The importance of growing crops in rotation with balanced manuring in maintaining soil productivity is well recognized the world over. As far back as 1926, Njveir, summarizing the data of the long-term rotational and manurial experiments in U.K. and U.S.A., came to the conclusion that the crop rotations were practi- cally 75 per cent as efficient as the use of fertilizers in increasing crop yields. The result of the long-term experiments in India at Pusa and Coimbatore also indicate to the fact that the productivity can bc fairly maintained by use of both rotations and manuring and not by any onc alone.