604 Eeport of the Department op Field Crops of thb 



The fertilizers had a marked effect on the size of the vines. 

 On the plats receiving 500 lbs. of fertilizer per acre they were 1| 

 to 2 times larger than on the plats with no fertilizer. Those from 

 1,000 lbs., 1,500 lbs. and 2,000 lbs. of fertilizers per acre did not 

 differ in sizes and were about three times as large as on the 

 unfertilized plats. 



In one instance the vines from the "potato formula" were 

 darker green than from the " L. I. formula " and in two other 

 cases the " L. I. formula " caused the vines to grow one-fourth 

 larger. 



Prevalence of disease. — On Mr. Fleet's and Mr. Hallock's farms 

 the vines were healthy with very little blight or rot. Either dry 

 weather caused premature ripening of Mr. Eobbins' potatoes or 

 else the early blight killed the vines. Mr. Jagger's crop was 

 badly affected by rot. 



Results of the Experiments. 



In order to answer the questions asked of this experiment, both 

 the weight and composition of the product must be known. In 

 the several tables of figures given herewith can be found a state- 

 ment of the yield of potatoes from the different mixtures and 

 amounts of fertilizers and also the content in dry matter, starch 

 and the important plant food constituents of the potatoes grown 

 by Messrs. Fleet and Hallock. 



Table I. Yield of potatoes on tenth acre plats. 



Table II. Average yield of potatoes per acre from different 

 amounts of fertilizer. 



Table III. Partial composition of potatoes. 



