96 



THE PHYSICAL PROPERTIES OF SOILS 



APPENDIX 



DIRECTIONS FOR TAKING SOIL SAMPLES 



In securing samples of soil from the field for 

 analysis or for the determination of moisture content 

 or pore space, great care must be taken to have the 



WM 



SAMPLING APPARATUS 



Used for taking samples when a large quantity of soil is desired. 



The sampling tube is 4 inches in diameter and 15 inches long 



samples represent, as nearly as possible, average field 

 conditions. When taken for laboratory use the sample 

 should be representative of the soil type, or of the field 

 conditions which are under consideration. 



Soils of glacial origin arc (juite variable in composi- 

 tion, making it extremely difficult to secure a sample 

 that will accurately represent any definite area or a 

 particular soil type. wSoils of residual origin are much 

 less variable in composition. 



