The study looked at how different ways of managing nutrients affected the yield and profits of rice and wheat crops in the Himalayas. They tested eight methods, including using different amounts of chemical fertilizers and organic materials like manure and green plants. After 20 years, they found that using a mix of green manure and chemical fertilizers for rice and manure for wheat gave the best results, with higher yields and profits compared to using only chemical fertilizers. This shows that a balanced approach to nutrient management can improve crop productivity and economic returns in the long run.