86 



MASS. EXPERIMENT STATION BULLETIN 165. 



While the waters differ somewhat in their composition, the main differ- 

 ence between them is in the concentration. The waters from the sulfate 

 plots are more concentrated than the others. 



The theory that calcium, when removed from the soil through fertiUza- 

 tion with anmionium sulfate, is removed in the form of calciimi suKate is 

 borne out by the above results. This is more clearly shown by the ratio 

 of calcium oxide to sulfur trioxide, which is fairly constant for the plots. 



As the waters from the limed and mihmed parts of the plots cannot be 

 kept separate, the differences due to Uming one-half of each plot cannot be 

 determined. To detennine if possible whether any differences existed, the 

 following experiment was conducted ■with soil from the limed and unlimed 

 areas of plots 5 and 6. 



Gal vani zed-iron cyhnders 3 inches in diameter were driven into the soil 

 to a depth of 8 inches, and a column of soil thus removed. The soil was left 

 in the cyUnder just as it was removed and taken to the laboratory. A linen 

 cloth filter was then placed over the bottom of the cyUnder and the soil 

 saturated with distilled water. When saturated, 500 cubic centimeters of 

 distilled water were poured on top and allowed to percolate through. 

 This was repeated five times, making six percolates from each sample. 

 Three samples from each plot were treated in this way. 



For purpose of analysis the second to the sixth percolates, inclusive, 

 were combined into one sample. The solutions were then analyzed for 

 total and fixed sohds, calcium, sodium, potassium, magnesium, iron, alu- 

 minium, sulfates and chlorides. 



