The phosphorus cycle in Germiston Lake IV. The relationship between the absorption, accumulation and release of phosphorus and the metabolic rate and phosphorus contents of the tissues of Potamogeton pectinatus L
A note on the relationship between annual rainfall and tree-ring indices for one site in South Africa
Besproeiing, gewasopbrengs en dreinering op die Vaalhartsbesproeiingskema: 4. Goeie vloedbesproeiing op ‘n sandgrond
The clay mineralogy of sediments in the Vaal Dam and in the rivers supplying and draining the dam upstream of the barrage