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  • Author or Editor: G. W. Varseveld x
  • Journal of the American Society for Horticultural Science x
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Abstract

Yields of snap bean pods were increased by irrigation and plant density in 4 field experiments. Highest yields were obtained with the −0.6 bar soil water potential regime which represented removal of 40-45 percent of the available soil water at 30 cm depth. Yields were lowest with the −2.5 bars soil water potential which represented 65-70 percent water removal. An average of 60 percent more water applied to the −0.6 bar than the −2.5 bars treatment increased yields approximately 54 percent. Yields were usually intermediate with the −1.0 bar soil water potential representing 50-55 percent available soil water removal. Two cultivars were used in 2 of the experiments and responded differently to irrigation. Yield of ‘Oregon 1604’ was higher than that of ‘Galamor’ with −0.6 bar soil water potential but was lower than ‘Galamor’ with −2.5 bars. Yield of ‘Oregon 1604’ averaged 27 percent higher in square arrangement than in 91 cm rows and the increase was greater for the high than for the low population density when compared in 1 experiment. Yield was 20 percent higher for high density of 43.0 plants/m2 than for low density of 21.5 plants/m2. Yields of 2 cultivars in 2 experiments averaged 67 percent higher in high density (40-57 plants/m2) than in low density (20-33 plants/m2) plantings. There were no consistent irrigation × density interactions. Usually there was a more rapid depletion of soil water for high density than for low density. Fiber in canned sieve size 5 pods was higher in ‘Oregon 1604’ at −2.5 bars soil water potential than for ‘Galamor’, but at the −0.6 bar soil water potential regime, the amount of fiber was similar in the 2 cultivars. Percent of pod weight attributed to seed and percent fiber were usually highest at −2.5 soil water potential.

Open Access