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A South African C4-dominated grassland was exposed to twice-ambient atmospheric CO2 concentration using gas emitted by a natural CO2 spring and distributed over a 7m x 7m plot. A similar control plot was established 20m away at near-ambient CO2 concentrations. Photosynthetic CO2 response curves...
Treatments involving a full growing season rest in alternate years, half a growing season rest (late season) in alternate years and no rest were applied to veld grazed by sheep or cattle at similar stocking rates. Residual effects of the treatments on veld vigour were determined by measuring...
Patterns of herbage removal by rotationally stocked cattle (at a density of 4.85AUE ha-1) on initially structurally homogenous Tall Grassveld were examined over a single season. Three unreplicated camps were stocked early (29 days), at the recommended '10-15cm' sward height (44 days), and late...
It has become almost universally accepted that the management of conservation areas and game ranches be subject to pre-determined sets of objectives and goals. Key to management decision making are the results of vegetation monitoring protocols that are designed to indicate changes in vegetation...
Napier grass (Pennisetum purpureum (L.) Schumach.) was studied using a 5 x 3 factorial experiment arranged in a randomised complete block design with three replications. The treatments were five fertiliser applications (0kg ha-1 N, 46kg ha-1 N and 92kg ha-1 N, 1t ha-1 and 2t ha-1 cattle manure)...
We tested the hypothesis that initial above-ground regrowth of defoliated grass tufts would be reduced in sites which have been exposed to prolonged heavy grazing. The regrowth of Themeda triandra and Urochloa mosambicensis tufts was compared between three heavily grazed sites close to a village...
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