Soil loss and crop productivity model in humid subtropical India.

摘要

The process of soil erosion leads to a huge amount of soil loss in humid subtropical India in both qualitative and quantitative terms and thus leads to low crop productivity. For the protection of land from soil erosion and to meet the increasing demand for food, it is imperative to locate and measure the type, degree and severity of soil erosion for proper planning to conserve or opt for alternative uses. The present work is a case study to describe the soil erosion and productivity model in one of the northeastern states of India, which represents humid subtropical climate. The model describes the relation between the topsoil loss due to erosion and the level of productivity. The study also allows the estimation of the tolerable soil loss, keeping in view the limit to permit crop productivity decline for a group of soils with specified depth range.