EXPERIMENTS ON THE INFLUENCE OF FERTILIZERS 



UPON THE YIELD OF TIMOTHY HAY WHEN 



GROWN ON DUNKIRK CLAY LOA^I IN 



TOMPKINS COUNTY, NEW YORK 



On Dunkirk clay loam a single application of stable manure at the 

 rate of 20 tons per acre, applied in the fall of 1903, has produced an in- 

 creased yield of oats in 1904 and an increased yield of hay in 1905 and 

 1906 valued at $51.69. The value of the increase yield of hay alone was 

 $47.88. The increase yield of oats and hay where 10 tons of manure 

 were applied, was at about the same rate per ton of manure when 20 

 tons were applied, the value of the increase being at the rate of $2.58 per 



714 713 712 711 



No treatment 80 lbs. muriate potash 320 lbs. acid phosphate No treatment 



404olbs. hayperacre 5370 lbs. hay per acre 4670 lbs. hay per acre 4360 lbs hay per acre 



ton of manure applied, Notwithstanding the cost of the application of 

 commercial fertilizers to the oat crop was in every case greater than 

 the value of the increase in the oats, yet during three years the annual 

 applications of commercial fertilizers have cost less than the value of 

 the increase in the oats and timothy hay produced. 



The most important ingredient in increasing the yield of timothy hay 

 has been nitrate of soda. Aluriate of potash has caused a marked increase 

 in the growth of " volunteer " Alsike clover, and thereby increased the 

 yield somewhat. Acid phosphate had but little effect and when applied in 



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