THE MINERAL CONSTITUENTS OF THE SOU, SOLUTION 45 



Locality, St. Marys, Md. Soil type, Leonardtown loam. Crop, wheat. 



Yield, poor. 



Locality, St. Marys, Md. Soil type, Leonardtown loam. Crop, corn. 



Yield, good. 



Locality, St. Marys, Md. Soil type, Leonardtown loam. Crop, corn. 



Yield, poor. 



It will be observed that the results given in the above tables 

 are expressed in parts per million of oven-dried soils, in order 

 to have some definite basis of comparison, and because it was 

 anticipated at the time the investigation was made that larger 



