New York AGRICULTURAL EXPERIMENT STATION. FT 
(2) In every section both of the sprayed rows outyielded the 
unsprayed row. 
(3) In different sections the yields of the rows treated in the 
same way varied considerably. This has happened also in all four 
of the previous experiments. It can not be avoided. In order 
to obtain reliable data in experiments of this kind sprayed and 
unsprayed rows must be alternated and repeated several times 
to get average yields. 
(4) The average yield of culls was greater on the sprayed 
rows than on the unsprayed, being 16 bu. 37 lbs. per acre on 
the unsprayed rows, 15 bu. 4o lbs. per acre on the rows sprayed 
three times and 13 bu. 45 Ibs. per acre on the rows sprayed 
five times. This is in harmony with the results obtained in 
previous years excepting 1905, when the yield of culls was 
greater on the sprayed rows. 
Yield by series— The ‘five rows sprayed three times constitute 
Series I and the average yield of these rows makes the yield 
for Series I. The yields given for Series II and III have been 
computed in the same manner. The yield by series is shown in 
the following table: 
Tasrg X.—YIELD BY SERIES AT GENEVA IN 1906. 





Series. Rows. Dates of spraying. Yield per acre. 
ig Bu. lbs. 
1 Ee sat Soa erm InAs elo andsila. el Malye Asgouste lLOvand "S0.4..1\o ee en 227 25 
LS BALE eg Degen le anGuld., | uly Gip20 sAteust 67,20 and Qin 22 258 40 
Pe tices Wea. Se Geo Re) and. loa INOtASDra VeCubarnt ceed ccchtises neta oe Chul 195 40 

Increase in yield due to spraying three times, 3134 bu. per acre. 
Increase in yield due to spraying five times, 63 bu. per acre. 
It appears that the last two sprayings of Series II (really one 
double spraying) on August 20 and 21 very nearly doubled the 
gain. | 
Loss from rot.— Only four rotten tubers were found in the en- 
tire experiment. 
At Riverhead.—In the experiment at Riverhead the potatoes 
were dug on September 1 and sorted into two grades, marketable 
tubers and culls, in the same manner as at Geneva. 
