The researchers studied how planting a mix of white oat and grazing vetch cover crops can help farmers in Eastern Cape improve soil health and control weeds. They found that the oat-vetch mix produced more plant material and suppressed weeds better than planting vetch alone. The oat-vetch mix also absorbed more nitrogen and phosphorus from the soil, which can help prevent soil degradation. This suggests that using a combination of these cover crops can be beneficial for farmers in the Eastern Cape province.