New YorK AGRICULTURAL EXPERIMENT STATION. 125 
Second sprayed row on the south, 2022 pounds, marketable 
tubers. ; 
Average of the two sprayed rows, 201914 pounds marketable 
tubers. 
Middle unsprayed row, 1331 pounds, marketable tubers. 
Yield per acre, sprayed, 336 bu. 35 lbs. marketable tubers. 
Yield per acre, unsprayed, 221 bu. 50 lbs. marketable tubers. 
Gain per acre, 114 bu. 45 lbs. marketable tubers. 
The yield of tubers below marketable size was at the rate of 
2434 bushels per acre on the sprayed and 373 bushels on the 
unsprayed. 
On the unsprayed row there were 116 pounds of rotten tubers, 
which is at the rate of 19 1-3 bushels per acre, while on the 
sprayed rows there was practically no rot—7 pounds on one 
row and 4 pounds on the other. Furthermore, the sprayed 
potatoes kept well in storage. Thus it is plain that spraying 
checked the rot, but it is strange that there was not more rot on 
the unsprayed row. In the majority of potato fields in the 
vicinity of Malone there was much rot owing to the abundant 
rains in the latter part of September. In a field lying just across 
the road at the east end of the experiment field, on the same 
kind of soil and with equally good growth of vines, the yield 
was about 30 bushels of marketable tubers per acre, the remain- 
der being rotten; while in another field across the road at the 
west end of the experiment field about one-half of the tubers 
were rotten. For some reason the unsprayed rows in Mr. Porter’s 
experiment did not blight as badly as did neighboring fields which 
were not sprayed and of course there was less rot. Another 
thing which protected Mr. Porter’s potatoes from rot to some 
extent is the fact that they were deep-planted. Deep-planted 
potatoes usually rot less than shallow-planted ones. 
The total vield of marketable potatoes on the eight acres was 
2940 bushels which is at the rate of 36714 bushels per acre. 
Although the yield was so large, scarcely any of the tubers were 
overgrown. The entire crop was sold at from 40 to 45 cents 
per bushel. 
