REPORT OF THE DEPARTMENT OF FIELD 
CROPS. 
I. COMMERCIAL FERTILIZERS FOR 
| POD A EOLS* 
W. H. Jorpan. 

SUMMARY. 
The work described in this bulletin is a continuation of tests 
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 gives the results of the first year’s effort at studying the 
economical use of commercial fertilizers in potato growing on 
Long Island. 

* Reprint of Bulletin No. 154. 
27 
