TME SOIL PAHTICLE 



107 



The Mechanical Analysis of Specific Crop Soils 





Wheat 



BARLEY 



Pot \.to 



Hop 



Frttit 





(9 samples) 



(9 samples) 



(8 samples) 



(7 samples) 



(6 samples) 



Fine gravel 



1.4 



1.2 



.9 



1.2 



1.0 



Coarse sand . 



3.7 



18.3 



20.1 



4.8 



6.8 



Fine sand . . 



24.5 



32.0 



43.5 



33.8 



42.0 



Silt .... 



23.0 



18.2, 



11.0 



28.8 



23.3 



Fine silt . . 



12.8 



8.0 



6.4 



8.7 



7.3 



Clay . . . 



20.0 



11.9 



9.7 



12.1 



10.9 



The soil particle can thus be seen to function in no 

 insignificant manner regarding plant conditions. Its 

 size, its physical relationships, its chemical composition, 

 and the conditions imposed by a preponderance or a 

 limitation in its various grades, are of vital importance. 

 Soil texture and soil class, therefore, are terms of constant 

 usage in soil discussion and study, whether the viewpoint 

 is practical or purely theoretical. 



