A pot experiment was conducted to find out the variation in soybean genotypes for phosphorus uptake and PUE
under phosphorus limiting condition and also to find out the efficient ones. Hundred genotypes of soybean [Glycine max
(L.) Merrill] were raised for 45 days in a P limited condition and compared with P sufficient condition. The soybean
genotypes differed greatly in growth and P uptake. Under P limiting condition the biomass production and P uptake were
reduced. Whereas root length and PUE increased. The P efficient genotypes were found to be associated with high biomass
production, root length and P uptake under P deficiency. The shoot dry weight under P limiting condition and relative shoot
dry weight (DM in limiting P/DM in adequate P supply) were found effective and simple indicators for screening P
efficient genotypes at seedling stage