30 



HATCH EXPERIMENT STATION. 



[Jan. 



The following tables show rates of yields per acre of both 

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

 two systems of manuring : — 



Average Yields per Acre (Pounds) . 



It will be noticed that the yields under the two systems 

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

 At cuiTent 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 Ave have secured equal crops at 

 a materially lower price, the advantage is clearl}^ 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 have for their object to show tlie 

 relative value as indicated by crop production of an average 



