A STUDY OF SOIL PARTICLES ll 



loam and clay. Record all observations in the outline form. 



Wet a small amount of each of the soils and compare 

 them as to stickiness ; as to feel, whether gritty or smooth 

 when rubbed between the fingers. Record your observa- 

 tions. 



Examine the different soils as to color. Is the color the 

 same as the color of the largest per cent of the soil particles? 

 Record your observations. 



Put a small amount of each kind of soil in a test tube, 

 fill the tube two thirds full of water, and shake thoroughly. 

 Set aside and observe the rapidity with which the particles 

 in each soil settle. Which settles the most rapidly? the 

 most slowly? Is there any relation between the size of the 

 particles and the rapidity with which they settle? Record 

 your observations. 



