30 



HATCH EXPERIMENT STATION. 



[Jan. 



The following tables show rates of 3delds per acre of both 

 hay and rowen on the several plots, and the averages for the 

 two systems of manuring : — 



Yields x>€,r Acre (^Pounds^ . 



Plots. 



Hay. 



Rowen. 



Plot 1 (lesser potash), . 

 Plot 2 (richer in potasli) , 

 Plot 3 (lesser potash) , . 

 Plot 4 (richer in potash), 



Average Yields jjer Acre (^Pounds) . 



It will be noticed that the yields under the two systems 

 of manuring, both in hay and rowen, are substantially equal. 

 At current prices, the cost per acre of the fertilizers used on 

 plots 2 and 4 is about $5 less than the cost of the materials 

 used on plots 1 and 3. As we have secured equal crops at 

 a materially lower price, the advantage is clearly with the 

 fertilizer combination richer in potash. 



V. — Manure alone v. Manure and Potash. 

 By way of description of this experiment, I cannot do 

 better than to quote from the seventeenth annual report : — 



These experiments, which luive for tlioir object to show the 

 relative value as indicated by crop production of an average 



