EXERCISE A-2. TO STUDY THE COMPOSITION OI 



SOILS. 



Equipment: Spade or soil auger; two pieces of oil- 

 cloth or heavy wrapping paper sixteen inches square; 

 two slender bottles; tablespoon. 



Method: By means of the spade or soil auger, secure 

 a sample each of a sandy soil and a heavy clay. Place a 

 tablespoonful of each soil in separate bottles and fill each 

 about two-thirds full with clear water. Shake each bottle 



Sandy Soil. 



Heavy Clay Soil. 



for one minute and allow to settle for five minutes. 01)- 

 serve carefully the layers in each bottle, the lai-gc particles 

 at the bottom and the finest material at the top. Use the 

 bottles shown above to indicate what you see. 



Discussion: Soils are composed of fine rock particles 



