REPORT OF THE DEPARTMENT OF FIELD 



CROPS. 



I. COMMEEOIAL FERTILIZERS FOR 

 POTATOES.* 



"W. H. Jordan. 



SUMMARY. 



The work described in this bulletin is a continuation of testa . 

 made in 1897, with added investigations. Unlike the results in 

 1897, when 1,000 pounds proved the limit of profitable applica- 

 tion, 1,500 pounds gave most profit in 1898. 



The Long Island formula (4, 8 and 10 mixture) gave better 

 results than the fertilizer based on the composition of the potato, 

 although the difference was less marked than in 1897. 



The new tests included 64 eighth-acre plats on four farms and 

 were planned to ascertain the effect of a full amount of potash as 

 compared with two-thirds as much, one-third as much and none 

 at all. The fertilizer without potash was as efficient as those 

 containing it; so the variations in amount showed no influence. 



INTRODUCTION. 

 Bulletin No. 137 of the New York Agricultural Experiment 

 Station ffives the results of the first year's effort at studying the 

 economical use of commercial fertilizers in potato growing on 

 Lone Island. 



Reprint of Bulletin No. 154. 



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