New York AGRICULTURAL EXPERIMENT STATION. 91 
being in section C, where the three-sprayed row 7 yielded only 
74 bushels per acre more than the unsprayed row 9. The great- 
est difference between a three-sprayed row and an unsprayed row 
in any one section (barring section D, in which there is evidently 
an error) is in section B, where row 4 yielded 12034 bushels per 
acre more than row 6. 
(2) In every case, except in section D, the seven-sprayed row 
yielded more than the adjacent three-sprayed row in the same 
section, the difference being least in section B, where it was 14 
bushels per acre, and greatest in section C, where it was 44 
bushels per acre. 
(3) The yield of rows receiving the same treatment varied con- 
siderably in different portions of the field. With the unsprayed 
rows the greatest difference was 30 bushels per acre; with the 
three-sprayed rows, 29 bushels; and with the seven-sprayed rows, 
299 bushels. These differences seem to have been due chiefly to 
differences in severity of attack by blight. The blight started in 
section E next an oat field which bordered the potato field on 
‘one side for about one-half its length. The damage done by 
blight was noticeably greater here than in any other part of the 
field. 
Yield by series.— The four rows sprayed three times constitute 
series I’, and the average yield of these four rows make the yield 
of series I. The yields given for series II and III were computed 
in the same manner. The yield by series is shown in the follow- 
ing table, in which the results of the experiment are reduced to 
their simplest terms. ; 
TABLE IJ.. YIELD BY SERIES AT GENEVA. 














Series. Rows. DATES OF SPRAYING. “aplatee 
| Seat ores Lone yt hg 7 Bu. sep 
for eta t,.and 13! hh NOP So SUC ANTUSLA Le Cae, hes ce 317 41 
Hy. 2,5, 8 and14:, Tune 25, Faly 10, 28, 30, August ue 26 and 
J September 10. SEE ode: BO 
1 AN Bale | a RCRA My di eh det 219 4 





T Rows of Section D omitted because of manifest error. 
