“…The kind of soil and its moisture content undoubtedly have an important relation to winter injury. Hunt (30), for example, says that the loamy soils of the corn belt which are usually friable and well supplied with organic matter are not so well adapted to wheat as the clay upland soils, because on the former wheat is likely to winterkill in unfavorable seasons. Montgomery ( 44) says that all heavy soils, in humid regions heave, due to alternate thawing and freezing.…”