57 



RESULTS OF THE ADDITION OF POTASH TO 



Value of decrease due to $8.78 



Financial result, 2.46 gain 14.78 loss 7.85 gain 9.74 loss 



On this half-acre the nitrate of soda appears to have been the most 

 beneficial ; but the large increase on plot 2 apparently caused by this 

 fertilizer, I believe to be more apparently than truly so caused. It 

 will be noticed that the yield of the nothing plot 1 by which the com- 

 parisons for plot 2 are most influenced is the smallest of any of the 

 nothings. This, perhaps due to natural variation in the soil, makes 

 the increase on plot 2 probably too large to represent the true effect 

 of the nitrogen. With all due allowance for this probable magnifica- 

 tion of the effect of nitrogen, however, I conclude from a study of 

 the results that on this soil nitrate of soda was largely beneficial, 

 while neither phosphoric acid nor potash appear to have been so. 



The " complete fertilizer," although furnishing much less plant- 

 food than the manure, as pointed out under the comparisons for the 

 North half-acre ; gave on this land a larger yield and a larger in- 

 crease than the latter, and of course, costing less, proved much the 

 more profitable. 



