64 



WHEAT 



growth from early seeding is more apt to smother 

 than later sown wheat or wheat which has been 

 fall pastured. 



4. The most common kind of winter killing 

 is caused by soil heaving, due to the alternate 

 freezing and thawing of very wet soils, which 

 gradually lifts the plants, exposes the roots and 

 finally raising the plants entirely clear of the soil, 

 breaks the roots completely destroying the crop. 

 Such winter killing is more likely to occur on poorly 

 drained, heavy, sticky soils that remain wet at 

 the surface than on soils of a more sandy or loamy 

 character. Soil heaving is most likely to occur 

 late in the winter or early in the spring, but it 

 may occur earlier in the winter, during a period of 

 open weather when thejsurface soil is wet. 



Fig. 18. A successful cement, home-made roller. 



