settle for an hour. Then pour off the clear portion of the 

 solution. Compare the dried residue from each soil, which 

 will essentially be sand, silt, and clay. Note the varying 

 proportion of the residues in the different soils. Study the 

 different types of soil. Compare them as to color, size of 

 particles, consistency, and behavior when wet and when 

 dry. Note the kind and appearance of plants growing 

 on each. 



Conclusion: Why should the first dried residue be of 

 coarser particles than the second, and the second coarser 

 than the material remaining suspended in the muddy water? 

 Why should soils differ in type, in color, and in size of 

 particles? Why do clays wet readily and sands wet much 

 more slowly? Why do differences occur in temperatures of 

 different soils? Why does grass grow better on clay loams 

 than on sandy loams, and corn better in a sandy region 

 than on clay? 



89 



