Some edaphic considerations regarding the introductions of legumes into veld

Abstract

Success with legume introduction into veld appears to be closely linked with a modification of the edaphic environment to suit the introduced species. In the high rainfall areas of South Africa where legume introduction probably holds most promise, excess soil acidity is a major factor limiting the growth of perennial, temperate legumes. The paper is largely devoted to a discussion of the effects of soil pH, calcium, phosphorus, and molybdenum deficiencies, manganese and aluminium toxicities, and symbiotic nitrogen fixation on the growth of calciphile legumes on acid soils. Results of field experiments and legume introduction trials in the Eastern Cape are included. The importance of fertility studies on cultivated soils and in the greenhouse, as a first step in the research programme, is indicated.

Keywords: veld|phosphorus|calcium|pH|temperate legumes|perennial legumes|growth|soil chemistry|high rainfall areas|introduced species|legumes|introductions|aluminium|edaphic environments|manganese|toxicities|nitrogen|Eastern Cape Province|fertility|molybdenum