The researchers studied different ways to feed soybean and onion plants to see which method gave the best yields and profits. They tested using organic materials like compost and biofertilizer, chemical fertilizers, and a mix of both. The best results came from using a mix of chemical and organic fertilizers, with the right balance of nutrients based on soil tests. This method gave the highest soybean and onion yields, as well as the most money earned from selling the crops. The soil quality and helpful microbes in the soil were also improved by these fertilizers over the five years of the experiment.