The article presents a model that shows how the number of animals grazing in certain areas affects the amount of grass available and the performance of each animal. The researchers looked at data from 15 grazing trials in Natal to create this model. They found that the stocking rate, or the number of animals in an area, has a direct impact on how much grass is available and how well each animal performs. This model can help farmers manage their grazing areas more effectively in moderately dry regions.