Studies were conducted at the farm at Horticultural Research Station, Pechiparai to find out the impact of farm yard manure (FYM) on the yield of Mucuna pruriens, a highly nutritious nervine pod. The results indicated that the fresh weight of whole plant was highest (88.30 g/plant) in M2T1 (FYM 20 t/ha) as basal. The dry weight, the number of seeds per pod (7.25) 1000 seed weight (947.0g), seed yield (2300.50 kg/ha) were highest in the treatment (M2T1). Intercropping of M. pruriens in young rubber plantations and application of FYM influenced the growth of rubber plants. The increase in stem girth of rubber plant was the highest in the treatment (M2T1). The alkaloid content L-Dihydroxy Phenyl Alanine (L-DOPA) was maximum in the same treatment.