The researchers studied different ways to grow wheat, mungbean, and rice together in dry areas. They tested five methods of planting and tilling the soil. Keeping 30% of the crop residue in the field and disturbing the soil less led to higher grain yields compared to traditional methods. Using raised beds or strip tilling with 30% residue retention gave the best results. After three years, the soil quality improved with 30% residue retention. This shows that keeping crop residue in the field can help increase productivity and soil health in dry areas.