To provide a complete package of technology to mungbean growers being agronomically practicable, sustainable and economically viable under the agro-climatic conditions of the target area, a research project was initiated at Agricultural Research Institute, Dera Ismail Khan, NWFP, Pakistan during 2003 and 2004. Mungbean variety ‚€œNM-98‚€Ě was used in all the research experiments. Data were recorded on various growth and yield parameters that varied from experiment to experiment.
The formulation of research objectives initiated four experiments to address farmer‚€™s problems. In weed management experiment, carried out in RCS design, the efficacy of various weed management strategies for mungbean crop were studied including water extracts of sorghum, eucalyptus and Acacia nilotica, used as a natural weed control approach in comparison with hand weeding and Stomp 330 EC (Pendimethalin) (Pre-emergence herbicide). All the treatments significantly affected almost all the yield and weed parameters during both the years under experimentation. The extract of acacia nilotica pods outclassed the other treatments with respect to weeds control and in increasing grain yield followed by hand weeding twice + Stomp 330 EC, while weedy check was at the bottom. Parameters like, number of pods planr-1 and grain yield increased 64.10 % and 68.8 % respectively by the application of extract of Acacia nilotica as compared to control. Dry weed biomass was also decreased by 75.33%. The allelo-chemicals existed in the extract of Acacia nilotica‚€™s pods were found to be dual acting agents i.e., controlling prevailing weeds as well as enhancing mungbean yield. Moreover, extract of acacia was also sustainable and economical.
All sowing dates had significant effect on most of the agronomic and physiological parameters studied. The highest grain yield of 1429 and 1534 kg ha-1 were recorded on 1st May planting in both experimental years.
The seed rates and row spacings significantly influenced the yield and yield contributing attributes during either years of the studies. The combination of 30 cm row spacing with 40 kg seed rate ha-1 proved to be the best for producing the highest grain yield (1363 and 1362 kg ha-1) during 2003 and 2004, respectively.
In an experiment on exploration suitable Rhizobium strain and phosphatic fertilizer dose, the strain VmM1 proved to be the best for the area regarding nodulation and increasing the yield. While phosphatic fertilizer dose of 50 kg P2O5 ha-1 proved to be economical and yield responsive.
It was found out that 1st May was the most suitable time along with a row-to-row spacing of 30 cm and seed rate of 40 kg ha-1 for getting maximum mungbean yield. Among weed control practices, acacia nilotica‚€™s pods water extract (two sprays 10 and 35 DAS) was the most effective and the Rhizobium strain Vm M1 was the best for increased nodulation. The P2O5 dose of 50 kg ha-1 was economical for obtaining maximum grain yield and net return per unit area.