New YorK AGRICULTURAL EXPERIMENT STATION. 103 
At Riverhead.—The potatoes were dug on September 9 and 
sorted into two grades, marketable tubers and culls, in the same 
manner as at Geneva. 
TaBLeE VII.—YIELDS IN THE EXPERIMENT AT RIVERHEAD. 




YIELD PER Row. YIELD PER ACRE. 
SECTION. | Row. Treatment. E . 
Marketable. | Culls. Marketable. | Culls. 
} Lbs. oz.|Lbs.  oz.|Bu. lbs.|Bu. lbs. 
RPE cates a Ch 8) tee 1 Sprayed 3 times... ../409 —| 58 —|272 40|38 40 
2 | Sprayed 6 times..... 404 —| 62 4/269 20/41 30 
3 Unsprayveda@e «sts. ts (25. 1 CSOre at LL ae BADE? 50 
[Sey She eae ewe 4 Sprayed 3 times...../372 10; 48 14/248 25/32 35 
5 Sprayed 6 times..... |424 12} 52 —/283 10\34 40 
6 Unsprayed........../305 2} 80 —'/203 25(53 20 
(Cha eee Zp Sprayed 3 times.....|386 —| 52 8/257 20/35 _ 
8 Sprayed 6 times..... 476 Papo 71317 52/38 ab 
9 DAPTAYVE oseos > af «/..|O02 6|103 8/201 35/69 — 
1D ove Sa eae 10 Sprayed 3 times...../380 3) 29 .—|253 27\19 20 
Tht Sprayed 6 times..... 481 et tid en loo 40/38 — 
12 Unsprayed secon a 320 1} 98 4/213 22/65 30 





Comments on the table-——As in 1902 and 1903 the difference in 
vield between the sprayed and unsprayed rows was much smaller 
at Riverhead than at Geneva. This is largely due to differ- 
ence in soil rather than to locality. In the experiment field at 
Riverhead the soil is very sandy and dry and during the past 
three years blight has been less destructive than in most other 
fields in the locality. 
In all four sections each of the sprayed rows yielded more than 
the unsprayed row, and, with one exception, Section A, the row 
sprayed six times outyielded the row sprayed three times. Why 
Row 1 (sprayed three times) yielded three bushels per acre more 
than Row 2 (sprayed six times) is not known. 
Yield by series.—The yield by series is shown in the following 
table: 
TasBLE VIII.—Y1EeLp By SERIES AT RIVERHEAD. 

SERIES. . Rows. Dates of spraying. Yield per acre. 
Bu. lbs. 
ie 144-7 and 410.482. June 14, July 21 and Aug. 9....... 257 58 
SUS or Se ee pe Sree | lees cuss June 14, 27, July 11, 26, Aug. 9 and 
DOP oP itd eT of ce cahben jie y oie ess tae 297 45 
BL Peers vo ak ee 36, anc LAE s s. INOt SPrayedstee. a as, «akin ieee ws erehs 201 25 




Increase in yield due to spraying three times, 564 bu. per acre. 
Increase in yield due to spraying six times, 964 bu. per acre. . 
