350 



BULLETIN ' D. 



Amounts of salts absorbed by clean water-washed sand during 



and 72 hours. 



.From the data of this table it is clear that this washed sand 

 has effected but a very small absorption of salts from the solution 

 used when compared with the absorption by the Hagerstown 

 Loam, and they serve to emphasize the point already made, that 

 very strong differences may exist in the absorptive power of dif- 

 ferent soils and that, until the reverse is proven by careful ob- 

 servation to be true, we must expert to find that soils having a 

 high absorbing power are capable, under favorable conditions, of 

 giving larger yields than those having small absorbing power, 

 and there can be no question regarding the desirability of carry- 

 ing out suitable researches to establish what relation there may 



