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 tjieir 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 yield 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-foui'th 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 between 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. 



