ECOLOGICAL STUDY OF GLYCINE MAX (L) AT GAYA DISTRICT ,BIHAR.

The present paper deals with Ecological experimenatal study of Glycine max (L) at Gaya District ,Bihar. The experiment was laid out in split-plot design having five nutrient levels in main plot and four in weed management practices in subplot. This experiment was done in departmental experimenatal plot at M U Botany. Application of 50% RDF along with 2.5 t FYM/ha andVermicompost1.25 t/ha recorded significantly higher plant height (54.60 cm), dry weight/plant (18.60 g), No. of leaves/plant (35.70), leaf area index at 60 DAS (5.36), No. of root nodules/plant at 30 DAS (20.46) and 60 DAS (61.31), No. of pods/plant (23.50), No. of grain/pod (2.52), grain yield (16.94 q/ha) and straw yield (28.64 q/ha) over rest of the treatments but was statistically at par with 50% RDF + 5 t FYM/ha. In weed management practices, hand weeding twice at 25 and 45 DAS recorded significantly higher plant height (55.47), dry weight/plant (18.40 g), No. of leaves/plant (35.10),leaf area index at 60 DAS (5.22), No. of root nodules/plant at 30 DAS (20.14) and 60 DAS (60.30), No. of pods/plant (22.52), No. of grain/pod (2.42), 100-grain weight (9.50 g), grain yield (16.71 q/ha) and straw yield (28.11 q/ha) over control but was at parwithPendimethalin1.0kg/ha(Pre-emergence)+onehandweedingat40DASand Pendimethalin 1.0 kg/ha (Pre-emergence) + imazethapyr 55 g/ha (Post-emergence) at 25 DAS. Kew words : FYM, Nodule, Glycine, Weed, and Vermi compost