Chemistry of variable charge soils

In the vast areas of tropical and subtropical regions there is a category of widely distributed, highly weathered soils known as "Red Earths," also referred to as Ferralsols, Acrisols, Oxisols, Ultisols, Latosols, Lateritic Soils, Krasnozems, Ferrisols, and Ferrallitic Soils. Because of the abundant rainfall and high temperature, this type of soil is considered one of the most important agricul…