At 5% and less O2 in the soil fruit set was reduced to zero.
CITATION STYLE
KOBAYASHI, A., IWASAKI, K., & TERANUMA, T. (1964). Pollen germination and berry set, growth and quality of Delaware grapes as affected by soil oxygen concentration. Engei Gakkai Zasshi, 33(4), 265–272. https://doi.org/10.2503/jjshs.33.265
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