A RECENTLY published article, "Soil Erosion and Soil Conservation in the Colonial Empire", by H. A. Tempany, G. M. Roddan and L. Lord (Emp. J. Exp, Agric, 12, 121 ...

which can be controlled through efficient soil conservation practices. Land degradation currently affects 1.9 billion hectares globally or about 65 per cent of global soil resources. With 85 per cent, ...