2008 Volume 77 Issue 4 Pages 511-515
There was a heavy rain fall on Nov. 19-20 and Dec. 26-27, 2006 in Ibaraki-prefecture. We examined wheat growth and soil conditions in a large paddy field in Inashiki-city, Ibaraki-prefecture, where poor emergence and large variability of growth were observed. Eighty observation points were set in the field and the ground level, plant density and soil water content were measured on Jan. 14, 2007. Plant density was low at the points where the ground level was low and soil water content was high. Moreover, a negative correlation was found between soil water content and plant height at the late growth stage and a positive correlation was obtained between plant height and grain yield. Low ground points tended to have high soil water contents throughout the wheat growth period.
