EXPERIMENT STATION BULLETINS. 



657 



At this .season there were no consistent (lifTerences hetween the solu- 

 ble salt content of the lower sections taken from cropped and nucropped 

 soils, respectively. Moreover, the freezing point lowerings, in general, 



were low. 



Several cropped and uncropped soils were sampled on August .5 and 

 Septenil)er 3, respectively, and the soluble salt content determined as 

 nsual. It is unfortunate that the surface layers or (luarter-inch sections 

 were discarded Inasmuch as the rainfall had been small ten days pre- 

 vious to sampling, according to the data given in table 34. A study of the 

 results obtained which are given in 1;i1)le 23 leads to the conclusion that 



TABLE 2.3. — EFFECT OF PLANT GROWTH ON THE CONCENTRATION OF THE SOIL 



SOLUTION. 



