54 a 



EXPERIMENT STATION. 



[Jan. 



Sulfate of Ammonia v. Nitrate of Soda as a Top-Dressing 

 FOR Permanent Mowings. 

 This is the ninth year of the experiment in which, it will be 

 remembered, we are using sulfate of ammonia and nitrate of 

 soda in such quantities as* to furnish equal nitrogen.^ The fol- 

 lowing table gives the fertilizer schedule and the yields per acre 

 for this year: — 



Although the potash was omitted from all these plots this 

 year a very satisfactory crop was obtained on all of them. The 

 results are in accord with those of previous years with one ex- 

 ception, namely, the rowen crop on the check or no-nitrogen 

 plot is much smaller in proportion this year than that obtained 

 on the other plots. 



The Lime Experiment. 

 This is the third year of the experiment which has for its 

 object a study of the relative value of different sources of lime 

 on the basis of equal application of combined calcium and 

 magnesium oxides. The field on which this experiment is being 

 carried out is the one on which for several years we compared 

 the practii;e of spreading manure in winter with the practice 

 of piling it on the field in the winter and spreading it in the 

 spring. In the manure experiment there were five plots, each 

 being divided into a north and a south half. The manure was 

 hauled to the field in the late fall and winter, and that for a 

 single pair of plots was hauled at one time, usually the same 

 day; the loads were placed alternately on the north half, where 



' All plots received an equal application of phosphoric acid. No potash was applied ia 1916. 



