30 
Bulletin 91. 
scabby. Two hundred and eighty-one pounds of seed gave a return of 1,531 
pounds of tubers, a yield of 5 y 2 pounds of tubers for every pound of seed 
planted, making a loss of 2%. 
Plat VI —This seed was selected from the culls of last year’s experi¬ 
ments. Only the round tubers were used. One hundred and seventy-five 
pounds of seed gave a return of 982 pounds of tubers, a yield of 5% pounds 
of tubers for every pound of seed planted, an increase of 2% over check. 
Results. —1. Treating diseased seed with corrosive sublimate, standard 
strength, increased the yield 41%. 
2. Carefully selecting perfect shaped tubers gave a gain of 106% of 
smooth, round tubers. 
3. Carefully selecting clean, long tubers gave a gain of 20%, but the 
tubers were all long and ill shaped. 
4. Cull seed gave a loss of 2%. The tubers were rough and scabby. 
5. Small, round seed gave a gain of 2% over check and the crop was 
fully as good in every way. 
TABLE VIII., SHOWING RESULTS OF EXPERIMENT NO. VIII. 
Plat Number 
TREATMENT 
Number Pounds of 
Seed Tubers 
Planted 
Total Number of 
Pounds of Tubers 
Harvested 
Yield in Pounds 
for every Pound of 
Seed Planted 
Gain or Loss 
Yield in Sacks 
per Acre 
i. 
Check_ _ ... . ... . ._ ... _ 
309 
1716 
5.55 
39 
ii. 
Corrosive Sublimate, 1 oz. to 8 gallons of water.__ _ . . 
334 
2616 
7.83 
41$ 
Gain 
55 
hi. 
Large Selected Seed.. ..... _ ... .. .. ._ ... . 
246 
2807 
11.41 
106$ 
Gain 
80 
IV. 
Long Pointed Seed. _ _ __ _______ ___ 
193 
1283 
6.64 
20$ 
Gain 
46 
V. 
Diseased Seed _ . _ _. .. ... _ _. 
281 
1531 
5.44 
2$ 
Loss 
38 
VI. 
Small Round Seed.. _ ... _ _ _ _ ... _ 
175 
. 982 
5.61 
2$ 
Gain 
39 
Experiment IX—These experiments were conducted in a field which had 
been planted in currents during the previous four years. It slopes toward 
the west and the soil is a heavy clay, but it has been well manured and 
cultivated for a number of years. It was plowed 8 inches deep in early 
spring and on May 6th planted with Rural New Yorker seed. These tubers 
were exceptionally clean. They were taken from a lot of tubers which was 
raised from mountain seed in 1901 by the Agricultural Department. The 
rows were planted 40 inches apart, the pieces being placed at intervals of 
15 inches, and 5 inches deep. The plants in this experiment came up uni¬ 
formly, and were all sprayed three times with Bordeaux mixture, which 
kept their foliage in good condition until killed by frost on the night of Sep¬ 
tember 11th. 
The water was unusually low in the ditch during the latter part of the 
season, consequently the plants in all of these plats suffered more or less 
from lack of moisture. All the plats were watered twice excepting Plat V, 
which was watered three times. The return from this plat shows plainly 
that if the field had been properly watered the yield would have been much 
larger. The plants in this experiment were carefully watched during the 
entire season, and we observed only a few diseased plants in these plats. 
The tubers were clean, smooth and free from scab. 
Plat I Check —The seed in this lot was taken from the dugout on De¬ 
cember 9th and was placed in water two hours and then placed on the floor 
