An Investigation into Species Composition and Dry Matter Production Change after Brush Cutting and Herbicide Treatment in Pteronia Pallens and P.
Pteronia pallens and P. paniculata are unpalatable species that dominate the veld in large parts of the Little Karoo. They normally increase as a result of overgrazing and, because of their longevity, are not easily replaced by more palatable plant species.
Organic wheat production is seen as a way of spreading risk because it is a niche market that can obtain higher prices. However, there is uncertainty about the potential of the organic wheat industry in South Africa.
This project aims to determine the optimum row width and plant density for canola (Verola 50) in a system of minimum tillage at Tygerhoek Experimental Farm.
Four rates of fertiliser nitrogen (0, 50, 100 and 150kg N/ha) are tested in combination with four factors (soil temperature, soil moisture, soil reaction and day length) as separate experiments:N rate and soil temperature (6, 12 and 18 oC), N rate and soil moisture (0.
Treatments include 5 levels of P (0, 80, 160, 240 and 300kg P/ha - incorporated to a depth of approximately 150mm prior to planting) and 5 levels of N (0, 200, 400, 600 and 800kg N/ha/annum).
The project involves planting different cultivars at different regions.
Five P-rates (0, 40, 80, 120 and 160 kg P/ha) are applied as topdressings (applied to the soil surface and irrigated into the root zone or mixed with the top 10cm soil through rotovator action).
This project involves planting different cultivars at different localities.
Degradation and desertification are two of the most important threats to our natural vegetation in arid and semi-arid areas.
This project involves investigating retting at three localities.