THE RELATIONSHIP EFFECT OF BACTERIAL INOCULATION, PLANT SPACING AND WEED CONTROL ON NODULATION, WEEDS, YIELD AND NET RETURN OF PEANUT PRODUCTION

The objective of study is evaluate the effect of bacterial inoculation, plant spacing and weed control methods on nodulation, weeds, yield and yield components as well as net return of peanut production. The treatments were arranged in split split plot design. Two bacterial inoculation being with inoculation and without inoculation were allocated in the main plots, three plant spacing being 7.5, 10 and 12.5cm between plants were arranged in sub plots and three weed control methods; pendimethalin at 684g/fed applied as post sowing plus clethodim at 125g/fed applied as post emergence at 30 days from sowing, two hand hoeing at 30 and 45 days from sowing and weedy check were arranged in sub sub plots. The predominated troublesome weed species in experimental fields through the two seasons were Portulaca oleracea and Tribulus longipetalus as annual broadleaf weeds, Digitaria sanguinalis, Cenchrus echinatus and Dactyloctenium aegyptium as annual grasses.

The results revealed that the three studied factors i.e. bacterial inoculation, planting species and weed control treatment were act as dependency, and their effect on the studied characteristics in both seasons were similar with minor differences. The main findings indicated that the interaction between bacterial inoculation at 400 gm/fed. and pendimethalin at 684g/fed applied as post sowing plus clethodim at 125g/fed applied as post emergence at 30 days from sowing gave the highest significant increasing on the number of active nodules/plant. The interaction between the herbicidal treatment and planting space at 7.5cm gave the highest significant reduction percentage on both annual broadleaf weeds and grassy weeds, associated to give the higher values of both pod yield (ardab/fed) and the net return (L.E./fed.). The interaction between the herbicidal treatment, bacterial inoculation at 7.5 ,10 and 12.5cm gave the highest values of both pod yield (ardab/fed) and the net return (L.E./fed.).