The researchers studied how spraying different fertilizers on groundnut plants during the Kharif season affected their yield and quality. They found that spraying 2% Ca(NO3)2 fertilizer at specific times significantly increased the yield of groundnut crops. The highest yields were obtained with Ca(NO3)2 spray, followed by 19:19:19 spray. The oil yield was also highest with Ca(NO3)2 spray. The shelling percentage was not significantly affected by the different treatments.