AGRICULTURAL EXPERIMENT STATION. 



87 



• It is seen in table C that the average yield of the plots to which 

 no manure "was applied is practically the same as the average 

 yield of those plots which were manured with muriate of potash 

 and sulphate of ammonia. The plots manured with dissolved 

 bone black show a decided increase over the unmanured plots. 

 The highest yield is given with dissolved bone black and muriate 

 of potash. 



The following table (D) shows the average yield per acre under 

 the various methods of fertilization, the gains on the manured 

 plots over the unmanured plots and the cost of same. 



This experiment shows quite clearly that for the soil on which 

 the experiment was carried, out and for this crop, the nitrogenous 

 manure was hot needed, and that it only served to increase the 

 cost of the crop. 



TABLE D. 







<h a 



9-1 «? 



^ 





i - 



Ph 







C-H 



o S" 



X 





a> » 









3 



^ & 



*a o 



ft 



co 



&£ 



ft 





ft 





rs «* 





03 . 



C 03 









« jj tc 



dj 





0} ^2 



• — — . 







3 <v 



N I-, 

 "1 o 





e yi 



per 



lbs 



S3 



M 



ft CO 



bJD^jO 



o3 a; 





.-. a 



M?5 



bO g 



CC 



O 



fee S . 



«-< 3 







3 ci 

 > — 



- 



3 



> 



5 



03 



<s 3 



> c3 



CO 



o 







< ft 



<n 



< 





<! 



P 







12 7 



854 









Dissolved bone-black 



40-j lbs. 



14.2 



924 





1.5 



70 



$2.40 



Dissolved bone-black . . \ 



400 '• 

 100 k ' 



15.9 



1020 





3.2 



166 



1.79 



Dissolved bone-black. . . \ 



•200 " 















Muriate of potash.. > 



50 '' 



14.9 



844 





2.2 



—10 



2.29 



Sulphate of ammonia .. j 



60 " 















Dissolved bone-black . j 



300 " 

















100 >k 



13.7 



872 





1.0 



18 



9.18 



Sulphate of ammonia . . J 



120 " 















Dissolved bone-black^., "j 



400 '■ 

















150 » 



15.9 



824 





3.2 



—30 



4.16 



Sulphate of ammonia . . j 



180 " 















The amount of commercial fertilizers that can profitably be 

 used in growing the staple agricultural products is a question 

 that every farmer must settle for himself, because of the varying 

 conditions under which farmers are working. But the experi- 

 ments at the Station present matter that is worthy of considera- 

 tion. 



Table E shows the crop producing power of the field without 

 fertilizers in the results obtained from the unmanured plots, 

 together with the results obtained from the use of different 

 amounts of commercial fertilizers.- 



In table F are shown the gains per acre and the cost of the fer- 

 tilizers producing them. 



