1. Bush fires that destroy thus grass and retarding its regeneration
2. Pests such as army worms and locusts destroy the grass, thus reducing the rate of growth and regeneration
3. Frequent droughts which are experienced in country destroy the grass
4. Domestic/ wild animals overgraze and clear some vegetation while causing stunted growth of grass
johnmulu answered the question on January 13, 2017 at 12:33