New YorkK AGRICULTURAL EXPERIMENT STATION. 123 
TaBLE I1V.—YIELD By SERIES AT RIVERHEAD IN 1903. 






SERIES. . Rows. Dates of spraying. Yield per acre 
at ae Bu. Lbs. 
| eae lesa feared eles Ae Htine Ow) UlvescraAnadeA Ue is st neta 246 45 
let . s Deo wor ang rl lie. oe at ine) 24 witilivareeotane A es7 fps 263 10 
Dele. Fie SOS, andi lL? ee to Notisora yea ei tenes Bhuds oon. 207 10 




Gain due to spraying.three times, 39% bu. per acre. 
Gain due to spraying five times, 56 bu. per acre. 
TABLE V.—YIELD BY SERIES AT GENEVA IN 1904.5 
(ee NR ES ST A ES Ef 







SERIES. Rows. Dates of spraying. - | Yield per acre 
oe ee i S| PS ee we a oe | a | a e er 
| Bu. Lbs. 
He rede. sisters rae elOMandel onveaninllily bo. oa, ANGE Ure lon one akucsieiee © 6 344 30 
4 Ld hee, a 2eows, bland, 147 5 TilVvesSe oe Ado lee LOLATIC. 2O a. ent ee OO 40 
CN 0 eer SEO COM ance Oo UN OCIS DTAV Gi. stot in seuetenescchoe an sl: 153 25 
Gain due to spraying three times, 191 bu. per acre. 
Gain due to spraying five times, 233 bu. per acre. 
TaBLE VI.—YIELD By SERIES AT RIVERHEAD IN 1904. 
SERIES. | Rows. Dates of spraying. vied per acre 
ad aad oD TOC ae Lbs. 
1 ee er See TP ar ean GLO’ r+: serch Nuinewlee) ily ol ands Ae. O85. ne. ce oe. Tee aayy 58 
Oe ee ate ows and Usenet June l4, 27, July 7 26, Aug. 9 sat 22.| 297 45 
4 eo S090 andl 2.5. ce} NOt sprayed SHR Ay HE Reedy ee ee ae by eRe 201 25 



Gain due to spraying three times, 56% bu. per acre. 
Gain due to spraying six times, 964 bu. per acre. 
DETAILS OF THE TEN-YEAR EXPERIMENTS IN 1905. 
SOIL, PLANTING, CULTIVATION, ETC. 
At Geneva.—The plat of land used was the same as that used 
for this experiment in 1903. It was a heavy clay loam containing 
some gravel. The surface drainage was good. During the season 
of 1904 it was seeded with red clover. The seed potatoes were 
of the variety Rural New ‘Yorker No. 2 selected from sprayed 
rows in the experiment of 1904. They were planted May 16 in 
rows three feet apart and with the hills 15 inches apart in the row. 
The cultivation was barely sufficient to keep down weeds. No 
doubt, considerably larger yields would have been obtained if the 
plants had received the proper amount of cultivation. 
At Riverhead.—The land used at Riverhead was a level plat of 
' sandy loam on the farm of Mr. G. F. Downs. The soil was of 
better quality and less sandy than that used for the experiment in 
*For details of the ten-year experiments in 1904 see Bulletin 264. 
