Critical Weed-Free Period for ‘Beauregard’ Sweetpotato (Ipomoea batatas)1

摘要: Studies were initiated at two different planting dates and conducted locations in 2001 to determine the critical weed-free period for certain populations of weeds organically produced ‘Beauregard’ sweetpotato. Naturally occurring weed used, they included sicklepod, redroot pigweed, yellow nutsedge. Treatments allowing grow 2, 4, 6, or 8 wk after transplanting (WAT) sweetpotato before removal maintaining WAT. Weedy checks also study. These treatments used length time can compete with without reducing yield must is no longer affected by newly emerging weeds. Yield number one grade roots best fit a quadratic plateau curve grow-back logistic treatments. Yields plots hig...