New York AGRICULTURAL EXPERIMENT STATION, 147 
Yield, sprayed, 182 bu. 39 lbs. marketable tubers per acre. 
Yield, unsprayed, 116 bu. 2 lbs. marketable tubers per acre. 
Gain, 66 bu. 37 lbs. marketable tubers per acre. 
The loss from rot was practically the same as in the seven-acre 
field. There was no noticeable difference between the amount of 
rot on the unsprayed rows and that on the sprayed rows. The yield 
of small and rotten tubers was 11 bu. 4o lbs. per acre for the 
sprayed and 13 bu. 44 lbs. per acre for the unsprayed. 
The average gain per acre in the two fields was 49 bu. 17 Ibs. 
worth $32.03 (at 65 cents per bushel which was the market price 
at digging time). After deducting the cost of spraying, $5.02, there 
remains an average net profit of $27.01 per acre. 
THE CHATEAUGAY EXPERIMENT. 
This experiment was made by Oliver Smith & Son, Chateaugay, 
Franklin county. It included three fields of potatoes having a total 
area of 17 acres. Some unsprayed rows were left in each field. 
The sprayer used was an Iron Age one-horse, four-row power 
sprayer carrying one nozzle per row. The bordeaux was prepared 
by the 6-6-50 formula. Most of the water required was con- 
veniently obtained from a small stream which ran between the larger 
two fields. The items of expense for spraying the entire seventeen 
acres (fifteen acres five times and two acres seven times) were as 
follows: 
Tee CONDCr Stlipiate. (5400. cue. s'0e edb ekar seer ewes nee $11.00 
150 Me per estate: OGL a. we re ed Ges dc CA fees ne 9.00 
175 MeO TE SS a ten CDEC oils we aya insd os anv sin ta vial ann, 240 tuo vec cn 14.00 
STMT DMD TAO eevee Sl Fre R t-s vos tee aG SUR See ae Vind ke 220 
LISI TAT ISUOTEEIIE CD TOCs 0k aces seit ces Ge Dele wccre cele ot a kanes 6.48 
Peaamies, apOr fOr Matt ands HOLse (@)-25C.0ki vs.h ck da wales ewe 14.44 
Sm aDOte OL cex ira nana). TSC Myo op ele d Gul diacwrab aes eserimrs 1.58 
eR PUMMER TT ANCUGT Peete ke toe SS olan eee it culys RAGE a mee 10.00 
Se eT dC a ee re Cw os Se Eng: ee eked ecg ttind es doe a Oe 6 $68.70 
The cost of spraying in this experiment was 77 cents per acre 
for each application. 

“The expense account calls for more copper sulphate than was actually 
used in the spraying. A barrel of stock solution containing 150 pounds of 
copper sulphate broke and a considerable quantity was lost. 
