The researchers compared different diets for crossbred bulls, including ones with sunflower straw and groundnut haulms. They found that bulls on these diets had similar dry matter intake and nutrient digestibility compared to a traditional diet. Bulls on the diet with 20% sunflower straw and 20% groundnut haulms had the highest digestible crude protein. Sunflower straw can be a good roughage source for bulls, especially when combined with groundnut haulms.