74 



HATCH EXPERIMENT STATION. 



[Jan. 



Yield per Acre (Bushels) , 



The averages calculated to show the relative effect of the 

 different fertilizers are given below in pounds per plot : — 



It becomes evident from a study of these figures that the 

 fertilizers proved moderately beneficial to this crop, and that 

 the sulphate of potash is superior to the muriate. The 

 various sources of nitrogen rank in the order, sulphate of 

 ammonia, nitrate of soda and dried blood, the first giving a 

 much larger average crop than either of the others. It 

 seems further important to point out that the combination 

 sulphate of ammonia with muriate of potash, which has 

 proved both in previous years and in this year so fatal 

 to most crops, has given a fine crop of potatoes, at the 

 rate of 447 bushels to the acre, the second in rank among 

 the seven plots. No explanation can be offered, beyond 

 that already suggested in the case of tomatoes, viz., that the 

 potato has a much longer growing season than the crops 

 doing so very poorly on this combination of fertilizers. It 



