19 



RESULTS OF MEASUREMENTS. 



No. 



of 



Plot. 



FERTILIZERS USED. 



Nothing, 



Nitrate of Soda, 



Dissolved Bone-black, 



Nothing, 



Muriate of Potash, . . 



Nitrate and Bone-black, 



Nitrate and Potash, 



Nothing, 



Bone-black and Potash, 



Nitrate, Bone-black and Potash, 



Land Plaster, 



Nothing, 



Barnyard Manure, 



Lime 



Nothing, 



Average of Measurements. 



These measurements show that the estimates of relative standing 

 above noted were generally correct. They do not show a relative 

 falling off in the plots which received nitrate, with the advance of the 

 season. This soil had apparently good retentive power. 



COMPOSITION OF BARNYARD MANURE USED. 



Moisture at 100° C, 73.570 per cent. 



Organic and volatile matter, 93.087 



Ash, 6.913 



Phosphoric acid, 0.189 



Calcium oxide, 0.185 



Magnesium oxide, 0.158 



Potassium oxide, 0.487 



Nitrogen, 0.338 



Insoluble matter. 6.038 , 



This manure was poorer than that used in most of our experiments ; 

 and yet it caused a comparatively large increase in the crop. Thus 

 the average crop ©n unmanured plots stands sixth in eight experi- 

 ments, while the crop on barnyard manure stands fifth. The average 

 increase in hard corn in all the experiments due to barn-yard manure 

 was 22.4 bushels; the highest in case of Yarmouth, 41.1 bushels; 

 next in this experiment, 24.5 bushels. This large increase from 

 manure perhaps indicates a need of other elements of plant food than 



