Residual effect of organic manure on growth and yield of Vigna unguiculata (l) Walp and Lablab purpureus L.

A field experiment was carried out in the Research farm located in the Botanical garden of Dr. Babasaheb Ambedkar Marathwada University, Aurangabad to study residual effect of organic manures on growth and yield of Vigna unguiculata (L) walp and Lablab purpureus L. Organic manures were prepared like green manure of Achyranthes (GMA), green manure of Parthenium (GMP), mixed green manure of both (GMPA), Dry powder of Achyranthes (DPA), Dry powder of Parthenium (DPP), compost of Achyranthes (COA) and compost of Parthenium (COP). These manures and chemical fertilizers PK and NPK were supplied to field for maize crop cultivation. Subsequent to harvesting of maize crop after 23 days of interval Vigna unguiculata (L) walp and Lablab purpureus L. was sown in the same plots in an alternative row manner. The growth analysis of the both the crops was recorded after 59 days. Harvesting of both crops was carried out and fresh weight per plot was noted. Samples of each treatment along with control were kept in oven for estimation of dry matter, nitrogen, crude protein, phosphorus, potassium and total reducing sugar. Percent increase over control and nitrogen efficiency ratio was also calculated. All organic manures showed good residual effect on growth and yield of both the crops. Compost of Achyranthes showed highest residual effect on Vigna unguiculata while compost of Parthenium gave highest residual effect on Lablab purpureus. Organic manures prepared from weeds increases the productivity of crop and show long term effect.