EFFECT OF SULFATE OF AMMONIA ON SOIL. 



87 



Table X. — Composition of Percolates in Parts per 100,000. 



Table XI. — Percentage Composition of Fixed Solids. 



The first difference noticed on studjang Table X. is the larger amount 

 of soluble salts removed in the first percolate than in the subsequent por- 

 tions. That this difference is largely a matter of concentration is shown 

 by a comparison of the constituents as shown in Table XI. The varia- 

 tions between the two plots are those due to the different fertihzers used. 

 Plot 5 has more sulfates and magnesium and less chlorides removed than 

 plot 6. Since plot 5 received its application of potash as low-grade sulfate 

 and plot 6 as muriate of potash, these differences were to be expected. 



The variations between the hmed and unlimed ends of the plots are 

 very similar. More calcium and less potash are removed from the limed 

 ends than from the unlimed. Traces of iron and aluminium were found 

 in all of the extracts, but showed no difference between the two plots or 

 between the hmed and unhmed areas of the plots. 



