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Baseline concentration of Cd, Co, Cr, Cu, Pb, Ni and Zn in surface soils of South Africa
(Academy of Science for South Africa, 2005)
THE AIM OF THIS STUDY WAS TO DRAW up baseline concentrations for several environmentally important trace elements in South African soils. A major inventory of some 4500 soil profiles has been compiled in South Africa over ...
Integrated approach to nutrient cycling monitoring
(Academy of Science for South Africa, 2007)
There are two issues of social importance in relation to nutrient cycling. The first is the depletion of nutrients in croplands and rangelands. The second is the overabundance of nutrients through the enhancement of inputs, ...