The researchers conducted a field experiment to improve the productivity and nutritional quality of groundnut plants using foliar nutrition. They tested different foliar treatments on the plants and found that a combination of urea, DAP, and MOP resulted in the highest net returns and yield parameters. This treatment also increased oil and protein content in the groundnuts, as well as nutrient uptake. Overall, foliar nutrition can enhance the growth and quality of groundnut plants, leading to better yields and nutritional value.