SCOURING TROUBLES 



141 



This bottom was used in a sandy soil growing alfalfa. The purpose 

 was to find out whether a steel plow would shed this soil as successfully 

 as a chilled plow. The illustrations on pages 142 and 143 show the 

 chilled plow in the same field. The plow was drawn back in the 

 furrow and no effort made to clean the earth from the mouldboard. 



This illustration shows the above plow in alfalfa sod. Observe that it 

 scours in one place and does not in another. This is characteristic of 

 the steel plow in gritty soils. It puddles the sandy soil which is bad for 

 aeration and helps to make it dry out quickly, paradoxical as it may 



