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Present investigation was undertaken at CPGS, CAU, Meghalaya in 2012 to assess the efficiency of baby corn + groundnut intercropping system on the basis of land equivalent ratio (LER), area time equivalent ratio (ATER), monetary advantage index (MAl) and aggressivity (A) as influenced by residual green manure and phosphorus. LER, ATER, MAl for baby corn + groundnut intercropping system were 1.35, 1.16 and Rs. 46,926, respectively. The yield of baby corn and groundnut in this system was 5.74 and 1.34 t ha−1 respectively. Aggressivity was positive for ground nut while negative for baby corn, indicating that groundnut was a dominant crop, since baby corn was harvested at its maximum vegetative stage where as groundnut was grown upto its maturity. Growth parameters including plant height, dry matter accumulation and leaf area index (LAI) were significantly influenced by residual green manure and phosphorus.