The researchers studied how different types of green manure decompose over time. They tested four species and a mix of two, measuring biomass loss over 180 days. The mix of Crotalaria juncea and Cajanus cajan had the most biomass, while Crotalaria juncea took the longest to decompose. The decomposition constant varied between species, with Crotalaria juncea having the lowest constant and longest half-life at 133 days.