9() Report oF THE BoOTANIST OF THB 
The potatoes were dug by hand and care taken to lose none. 
The product of each row was sorted into two grades, mar- 
ketable tubers and culls, and the weight of each grade taken. 
All tubers larger than a hen’s egg were graded as marketable. 
The sorting was nearly all done by the writers and as uniformly 
as possible. 
TasBLE I. YIELDS IN THE EXPERIMENT AT GENEVA. 
























YIELD PER Row. YIELD PER ACRE. 
Section.| Row. TREATMENT. | | | 
Markel |v Gul “ha Mad adem 
S al TEs by P'tbe on RO, ae 
se Sprayed 3 times....} 388 11 | 31 6 | 323 54 | 26 8 
A. 2. ‘ Sprayed 7 times... 427 2 25 184 355 56 | 21 15 
Mavgt E tihephived AL ae ri | 282 14 29 8 | 235 “43 “24 35 
| 4, Sprayed 3 times....| 394 14/26 14) 329 3/22 23 
Be | 5. -|:Sprayed 7times.-,21-411e) 980 26.00 e840) te aon 
| 6. gnsptaied: aly. ys 250 9 | 35 0 208 48/29 © 10 
} 


fm Sprayed 3 times... | 360 5-2 |f29. 6421 300°.) 624 47 






C. 1). 8° 8) Sprayed '7 times? :// 11! 419° 773" 25 9 | 344 19 | 21 is 
, 


9. | Unsprayed... >... 271, 114 26) 19.) 226 ena ee ee 





10. | Sprayed 3times..../ 427 8/15 0| 356 15/12 30 


DA Lie Sprayed 7 times... | B59 slau y2l 1: }:324.' 50 7 AY 33 


12. | Unsprayed........ 1276} 82). 32 || 2) ]1230/725,1 260 eae 

13. | Sprayed 3times ...| 360 13 20 4 300 40 16 52 






E. | 14. | Sprayed 7 times....| 392 11 | 22° 2, (327 CST ee 
15. | Unsprayed........ 246 7/|30 10) 205 21/25 3! 









Comments on the table-—An examination of the above table re 
veals the following: (1) In each of the five sections the sprayed 
rows yielded more than the unsprayed row, the least difference 
6Tt will be observed that row 10 (sprayed 3 times) yeilded at the rate’of 214 bu. per acre 
more than row 11 (sprayed 7 times). There is surely some error here, but it has been impos- 
sible to account for it. It is not in the weighing. Because of this discrepancy it will be 
necessary to leave section D, comprising rows 10, 11 and 12, out of consideration in making 
up the average yields. 
