Differences In Biomass and Nitrogen Accumulation Among Soybean Genotypes In Response to Soil Water Availability.

Experimental evidence indicates that differences among soybean genotypes for sensitivity of dinirtrogen fixation to water deficits may be influenced by differences in well-watered shoot-N concentration. In a field experiment, high-yielding soybean cultivars and plant introductions selected for extreme shoot-N concentration were evaluated at four irrigation levels for shoot biomass and N accumulation and yield.