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PUBLIC DOCUMENT — No. 33. 



29 



ash also is large. It will not be Avondcred at that after five 

 years of such treatment these manure plats are yielding 

 larger crops than those receiving smaller amounts of manure 

 and potash. The average ditiereuce in favor of the manure 

 alone this year is at the rate of 6.8 bushels of grain and 3(34 

 pounds of stover per acre, — not enough to cover the larger 

 cost of the manure, as compared with the cost of the lesser 

 amount of manure and the potash. The crop per acre is 

 worth this year |4.17 more when manure alone was applied ; 

 but the 6 cords of manure must be reckoned as costing $6.80 

 more than the 4 cords of manure and the 160 pounds of mu- 

 riate of potash. 



Special Corn Fertilizer v. Fertilizer containing More 



Potash. 



Many soil tests in different parts of the State having indi- 

 cated that fertilizers for corn should contain a larger propor- 

 tion of potash, an experiment in continuous corn culture 

 was begun in 1891. There are four plats of one-fourth of 

 an acre each, on two of which the " special" furnishes the 

 amounts of nitrogen, phosphoric acid and potash that would 

 be supplied by the application of 1,200 pounds of a fertilizer 

 having the average composition of all leading kinds offered 

 in our markets in 1891. 



The materials used are shown below : — 



FERTILIZEUS. 



Plats 1 and 3 



(I'ounds). 



Flats 2 and 4 

 (I'uiindb). 



Nitrate of soda, 

 Dissolved bone-black, 

 Muriate of potash, 



551 

 213 



27 



33 



75 



The yields the past year are shown ])elow : — 



Plat 1, "special" fertilizer, stover, 1,092 pounds; grain on ear, 1,112 



pounds. 

 Plat 2, fertilizer richer in potash, stover, 1,199 pounds; grain on ear, 



1,055 pounds. 

 Plat 3, " siJecial " fertilizer, stover, 958 pounds; grain on ear, 1,220 

 - pounds. 

 Plat 4, fertilizer richer in potash, stover, 1,100 pounds; grain on ear, 



1,190 pounds. 



