214 AGRICULTUEAL EXPERIMENT STATION. [Jan. 



their potash in the form of muriate of potash and others in 

 the form of the highest grade of potassium sulphate (95 per 

 cent.). The subsequent tabular statement shows the quan- 

 tities of the manurial substances applied to the different 

 plats : — 



Plats. 



Annual Supply of Manurial Substances. 



Pounds. 



Plat 1, 

 Plat 2, 

 Plat 3, 

 Plat 4, 

 Plat 5, 

 Plat 6, 



Sulphate of ammonia, 

 Muriate of potash, 

 Dissolved bone-black, 

 Nitrate of soda, . 

 Muriate of potash, 

 Dissolved bone-black, 

 Dried blood, 

 Muriate of potash, 

 Dissolved bone-black, 

 Sulphate of ammonia, 

 Sulphate of potash. 

 Dissolved bone-black, 

 Nitrate of soda, . 

 Sulphate of potash. 

 Dissolved bone-black. 

 Dried blood. 

 Sulphate of potash, 

 Dissolved bone-black. 



38 

 30 

 40 

 47 

 30 

 40 

 75 

 30 

 40 

 38 

 30 

 40 

 47 

 30 

 40 

 75 

 30 

 40 



This proportion corresponds per acre to : — 



Pounds. 



Phosphoric acid (available) , 50.4 



Nitrogen, 60.0 



Potassium oxide, 120.0 



Beets, cabbages, celery, lettuce, spinach, tomatoes and 

 potatoes have thus far been raised upon the field. 



The order of arrangement of the different crops within 

 each plat was the same in all of them for the same year. 

 They occupied, however, a different position relative to each 

 other in successive years, to introduce-, as far as practicable, 

 a system of rotation of crops. 



