46 EXPERIMENT STATION. [Jan. 



stand a more concentrated soil solution. Pfelier, in speaking 

 of the concentration of cultural solutions, says, " The concen- 

 tration of the cultural fluid is always important, for when its 

 osmotic concentration passes a certain limit growth becomes 

 impossible, though no poisonous effect is exercised, while when 

 the fluid is too dilute, or when a single essential salt is present 

 in insufficient amount, the development of the plant is re- 

 tarded." 



As a remedy for the trouble under consideration the rotation 

 of crops is advised. Corn seems to be a good hoed crop to be 

 growu on soils in this condition. It requires a liberal amount 

 of potash and other plant food constituents, and it appears to 

 withstand the effect of the concentrated soil solution. The 

 writer has known of some tremendous yields of corn, grown on 

 tobacco soils evidently suffering from overfertilization, with- 

 out the addition of any fertili?:er whatever. Grass can follow 

 corn with satisfactory results, and after three or four years 

 of such treatment the soil can be used again for tobacco. 



It is needless to say that if possible such land as has been 

 described would be greatly benefited by underdraining, and it 

 is strongly advised. 



