Humic Acid and Nitrogen Levels Optimizing Productivity of Green Gram ( Vigna radiate L.)

Organic matter incorporation into soil act as nutrients reservoir which frequently supply minerals and nutrients to plant and optimizing yield. Humic acid act as a bio-stimulants which improve biological and chemo-physical properties of the soil. In this context an experiment was conducted to determine the effect of different levels of nitrogen and humic acid application on the yield and yield component of mungbean at Palato Farm of the University of Agriculture Peshawar, Amir Muhammad Khan Campus Mardan during summer 2012. The experiment was conducted in randomized complete block design (RCBD) with three replications and plot size was kept 3 × 4 m. The experiment was consisted on two levels of nitrogen (20 kg and 40 kg ha –1 ) and four levels of humic acid (3, 6, 9, and 12 kg ha –1 ). Mungbean variety “NCM 213” was sown on a well prepared clay loam soil. Effect of nitrogen and humic acid was found significant for number of plants m –2 , plant height (cm), number of leaves plant –1 , pods length (cm), numbers of seeds pod –1 , number of pods plants –1 , thousand seed weight, seed yield and for harvest index. Interaction between N and HA was found significant for some of the parameters and non-significant for the rest. Control plots (un fertilized) resulted lower in all measured parameters as compared to the rest plots (fertilized plots).