Soil
soil: the earth in which plants grow. chernozem, loess, podsol, subsoil, topsoil. COMMENT: Soil is a mixture of mineral particles, decayed organic matter and water. Topsoil contains chemical substances which are leached through into the subsoil where they are retained. Without care, soils easily degrade, losing the few nutrients they possess and becoming increasingly acid or sour. Proper soil management ensures fertility and productivity, supporting healthy crop growth and sustainable agriculture.