Samaiya, R.K.Tembhekar, Atul Nandkishor2016-08-292016-08-292013http://krishikosh.egranth.ac.in/handle/1/74294ABSTRACT The present research investigation entitled “Effect of foliar application of plant growth regulators on assimilate partitioning, growth, seed yield and quality of soybean. (Glycine max (L.) Merrill)” was conducted with fourteen treatments of plant growth regulators, Viz; potassium humate, with various concentration and biozyme. in a RBD design with four replication, At the Research Farm Dusty Acre ,Department of Plant Breeding &, Genetics ,JNKVV, Jabalpur during kharif season 2012-13. A progressive pattern of increase in LAI was noted with the treatment of crop age and maximum was noted with 70-80 DAS. Foliar application of Potassium Humate (70-80%)+Minerals natural(10-15%)+moisture @ 1.5 g/L , maximum LAI was recorded with this treatment . The LAD increase upto 70-80 DAS and there after it declined sharply. Maximum LAD was maintained with Potassium Humate (70-80%)+Minerals natural(10-15%)+moisture @ 1.5 g/L and with other treatment. Similarly, maximum RGR was noted at 70-80 DAS with a differential pattern among various treatment of foliar spray. SLA showed a increase from 70-80 DAS . The betterment in structural components of yield resulted in maximum realization of productivity potential in soybean with foliar application of plant growth regulators, The yield attributing character of soybean viz; Plant height ,No. of leaves/plant ,No. of branches/plant, No. of nodes /plant, No. of effective nodes / plant ,effective nodal length /plant ,No. of flowers /plant ,No. of pods /plant, Pod length(mm), Pod width (mm),No. of seeds / pods, Seed index (gm), Seed yield (q/ha),Biological yield (q/ha),Harvest index (%) significantly improved with PGR treatment. significantly maximum seed yield was registered under foliar spray of Plant extracts, protiens, carbohydrates, inherent nutrients from fish and vegetable source+stabilizers, preservatives and aqueous diluents @ 3.0 ml/L. fallowed by Potassium Humate (70-80%)+Minerals natural(10-15%)+moisture @ 1.5 g/L.enThesis