Studies on Harvest Index in SoybeanR NGadagauthorH DUpadhyayaauthorJ VGoudauthorAccording to Vogel et 01. (1963) the r.i.ght approach to increase the seed yield is the improvement in total biological yield and/or harvest index. Further, harvest index is a highly conservative and stable character (Spaeth et 01; 1984, Mercellos, 1987) and accounts for 95% variation in seed yield alongwith growth rate (Takeda et 01., 1979). These factors empha"ize the importance of harvest index in identifying the most efficient genotypes with superior biological and seed yielding abilities (Sharma et af., 1987). But the study of genetic architecture of harvest index is essential before embarking upon selection based 011 it. In the present study heterosis, combining abil ity and gene effects for harvest index were investigated...........Agriculture-Farming, Production, Technology, Economics1990National Academy of Agricultural SciencesArticle