1895.] PUBLIC DOCUMENT — No. 33. 191 



Amount of Fertilizing Ingredients used Annually per Acre. 



( Nitrogen, . . . .45 pounds. 

 Plats 0, 1, 2, 3, 5, G, 8, 10, -j Phosphoric acid, ... 80 pounds. 



[^Potassium oxide, . . . 125 pounds. 



{Nitrogen, .... none. 



Phosphoric acid, ... 80 pounds. 

 Potassium oxide, . . . 125 poimds. 



One plat, marked 0, received its main supply of phos- 

 phoric acid, potassium oxide and nitrogen in form of harn- 

 yard manure ; the latter was carefully analyzed before being 

 applied, to determine the amount required to secure, as far 

 as practicable, the desired corresponding proportion of the 

 three essential fertilizing constituents. The deficiency in 

 potassium oxide and phosphoric acid was supplied by 

 potash-magnesia sulphate and dissolved bone-black. The 

 fertilizer for this plat consisted of 800 pounds of barn-yard 

 manure, 32 pounds of potash-magnesia sulphate and 18 

 pounds of dissolved bone-black. 



The mechanical preparation of the soil, the incorporation 

 of the manurial substances, — the general character of the 

 latter being the same, — the seedhig, cultivating and harvest- 

 ing were carried on year after year in a like manner and 

 as far as practicable on the same day in case of every plat 

 during the same year. 



The subsequent tabular statement shows the annual appli- 

 cation and special distrilmtion of the manurial substances 

 with reference to each plat since 1889. The fertilizers were 

 in every case applied broadcast as early in the spring as 

 circumstances permitted. They were well harrowed under 

 I)efore the seed was planted in rows b}' a seed drill. 



