NATURE OF SOIL 313 



5. Determine what kind of soil there is in your school 

 yard, such as silt loam, clay soil, or sandy loam, and com- 

 pare the aggregate surface of the particles of a cubic foot of 

 it with the area of the school grounds. 



6. What is a soil auger and for what is it used ? What 

 is a soil survey, and how and why is it made? Consider 

 the possibility of joining with your classmates in making a 

 soil survey and a soil map of your school district. 



