The researchers studied how different ways of adding phosphorus affected the growth and yield of no-till sorghum in a rice-sorghum sequence. They found that using green manure with dhaincha and PSB on rice before sorghum, along with giving 50% RDP to sorghum, led to taller plants, more plant matter, better yield, and more grains. However, giving 50% RDP to rice before sorghum did not make a significant difference in sorghum growth and yield.