Bull. Spec. CORESTA Symposium, Taormina, 1986, p. 52, A12, ISSN.0525-6240
A possible exception to the rule : irrigated flue-cured tobacco on black clay soils
Tobacco and Cotton Research Institute, Rustenburg, South Africa
The black clay soils in South Africa are in several aspects similar to the Australian"black earths", the Indian"regur", pellic vertisols (FAO) and vertisols-pelloxerets (USDA). Fluctuation in rainfall (200-500 mm per growing season and ...