Soil Conservation and the Maintenance of Soil Productivity

Abstract

A CCORDING to the basic laws of conservation, matter and energy can neither be created nor destroyed. These principles apply to the material of which soils are made, as well as to the rest of the earth. The soil, as an individual entity, can be destroyed partly or completely. The matter in it can be transformed into a myriad different compounds and dispersed throughout the globe, but it cannot be destroyed. It will still exist somewhere and be available at some time for use in an-