Abstract
Abstract Snap bean (Phaseoius vulgaris L.) showed an increasing preference for NO3 with increasing total N and equal ratio of NO3 to NH4 when grown in nutrient culture. The percent increase in NO3 uptake over NH4 from solution was about the same as the increase in percent K content found in the plants at harvest. Peak periods of NO3 and NH4 uptake were observed, similar to what has been found for the other vegetable legumes.
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