WEIGHT OF SOIL PER CUBIC FOOT 



21 



Calculate the weight of an acre of this soil to the depth 

 of one foot. This will give the weight of an acre-foot. 



Repeat the determination for the clay soil and record 

 the results in both cases in the following table: 



Discussion: The weight of a given volume of soil 

 depc;nds very largely upon the amount of organic matter 

 present — the greater the proportion of organic matter the 

 lighter the weight of the soil. The extent to which the 

 soil is compacted also influences the volume weight. 



