1894.] PUBLIC DOCUMENT — No. 33. 191 



Conclusions. — An examination of the results given above 

 shows that the total crop on those plats to which no nitrogen 

 was applied (4, 7 and 9) averaged 800 pounds less than in 

 case of the plats which received their regular supply of ni- 

 trogen in some form or other. 



Plat 8 shows again the exceptional conditions of previous 

 years, for, although fertilized in a like manner as Plat 6, its 

 total yield was 1,800 pounds less. 



In yield of grain those plats which received their nitrogen 

 in the form of sulphate of ammonia (5, 6 and 8) averaged 

 92 pounds ; those in the form of organic nitrogen (0, 6 and 

 8), 140| pounds; those in the form of nitrate of soda (1 

 and 2), 140^ pounds. 



The best results in relation of total yield to yield of grain 

 were obtained in the case of those plats receiving organic 

 nitrogen (dried blood and barn-yard manure), or nitrogen 

 in the form of nitrate of soda ; while in the case of sulphate 

 of ammonia the ratio of grain to straw was too wide to give 

 the best satisfaction. 



The total ^deld of crop on the plats receiving no nitrogen 

 addition, as compared with those receiving a nitrogen supply, 

 was : — 



With oats in 1890, one-fifth to one-sixth less ; 

 With rye in 1891, one-fifth to one-sixth less ; 

 With soja bean in 1892, one-third to one-fourth less ; 

 With oats in 1893, one-seventh to one-eighth less. 



From this it will appear that the introduction of a legu- 

 minous crop into our rotation has somewhat reduced the dif- 

 ference in yield lietween the plats receiving no nitrogen and 

 those receiving it, yet has not entirely obliterated it. 



These experiments will be continued another year, with 

 some modifications. 



