62 



THE PHYSICAL PROPERTIES OF SOILS 



GALVANIZED IRON CYLINDERS 

 Used in studying the eflfectiveness of different mulches in conserving 



soil moisture 



Weigh and record the loss in weight at forty-eight- 

 hoiir intervals for one week. Calculate the loss in tons 

 per acre for each treatment, and discuss the relative 

 effectiveness of the different mulches. 



References : 



Burkett, "Soils," Chapter XXL 

 King, "The Soil" p. 194. 

 Hall, "The Soil," p. 97. 



