Bhumika Patel1, V.K. Gupta2, Rajendra Lakpale3 and Pritee Awasthy*4
Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh), India
* Email: awasthypritee30@gmail.com
Absract: The experiment using JS 97-52 variety of soybean was laid out during kharif season of 2013 at the Research Cum Instructional Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) using Randomized Block Design, comprising four replications and eight treatments. The result revealed that highest number of root nodules plant-1 was recorded under hand weeding twice at 20 and 40 DAS, however it was found comparable with Sulfentrazone @ 300 g a.i. ha-1as PE + Imazethapyr @ 100 g a.i. ha-1 as PoE. The lowest root nodules plant-1 was registered under untreated control. Maximum dry weight of nodules plant-1 was recorded under hand weeding twice at 20 and 40 DAS as compared to other treatments, however it was on par with Sulfentrazone @ 360 g a.i. ha-1 as PE and Sulfentrazone @ 300 g a.i. ha-1as PE + Imazethapyr @ 100g a.i. ha-1 as PoE . The lowest weight of root nodules plant-1 was registered under untreated control. Maximum rhizobial population was observed under treatment untreated control, which was at par with treatment hand weeding twice at 20 and 40 DAS, and minimum rhizobial population was observed under treatment Pendimethalin @ 1 kg a.i. ha-1 as pre-emergence.Minimum density and dry weight of weeds were also registered under Hand weeding twice at 20 and 40 DAS.
Keywords: Nodule number, rhizobium population, weed control, soybean
REFERENCES
Idapuganti, R.G., Rana, D.S. and Sharma,R. (2005). Influence of integrated weed management on weed control and productivity of soybean [Glycine max (L.) Merrill]. Indian Journal of Weed Science 37 (1/2): 126-128.
Jeenie, P. and Sharma, V. (2011). In vitro sensitivity of rhizobium and phosphate solubilising bacteria to herbicides. Indian Journal of Microbiology 51 (2): 230-233.
Karande, D.R., Kadam, G.L., Talnikar, A.S. and Jogdand, P. B. (2008). Integrated weed management in soybean (Glycine max). International Journal of Agricultural Science 4 (1): 107-113.
Kolhe, S.S., Choubey, N.K. and Tripathi, R.S. (1998). Evaluation of fenoxaprop-p-ethyl and lactofen in soybean. Indian Journal of Weed Science 36(3-4): 216-217.
Pal, D., Bera, S. and Ghosh, R.K. (2013).Influence of herbicides on soybean yield, soil microfiora and urease enzyme activity.Indian Journal of Weed Science 32 (3&4): 135-139.
Subba Rao, N.S. (1988). Biological nitrogen fixation. Oxford and I.B.H. Pub. Co., New Delhi.
Swarnakar, V.K. (2010). Study of critical crop-weed competition period in soybean (Glycine max L.). M.Sc. (Ag.) Thesis Department of Agronomy, College of Agriculture, IGKV, Raipur (C.G.).