FIELD EXPERIMENTS WITH FERTILIZERS. I47 



The results of the soil test of ipoi indicate that the mineral 

 fertilisers zvere of greater value than nitrogen iji increasing the 

 yields of soy beans. Nitrogen was of some value, however, 

 especially when supplied in the form of manure. While the 

 complete fertilizer (plot G) gave a?i iticrease of only two bushels 

 per acre over the yield zvhere only miiieral fertilizers were used 

 (plot F), Jhe manure (plots X and Y) gave a7i i^icrease of nearly 

 nine bushels. 



In general the results obtained during the past ttvelve years 

 with the leading crops indicate that nitrogen a?id phosphoric acid 

 are of prime hnportance for use on this particular soil in order 

 to get good yields of oats. The same ingrediejits also produced 

 the most marked results on the yields of corn during the three 

 years in which this crop has been grozvn in the rotation, while o?i 

 the other hand, potatoes have responded more generally to the zise 

 of potash. 



