Potato Failures. 
29 
TABLE VII., SHOWING RESULTS OF EXPERIMENT NO. VII. 
Plat Number. 
TREATMENT. 
Number Pounds of 
Seed Tubers 
Harvested 
Total Number 
Pounds of Tubers 
Harvested 
Yield in Pounds 
for every Pound of 
Tubers Planted 
Gain or Loss 
Yield in Sacks 
per Acre 
I. 
Check_ . 
111 
1809 
16.30 
147 
II. 
Treated with Corrosive Sublimate 1 day before planting 
90 
2125 
23.61 
45$ 
Gain 
213 
III. 
Treated with Corrosive Sublimate 5 months before planting 
109 
937 
17.77 
9$ 
Gain 
160 
IV. 
Double Corrosive Sublimate Treatment . _ ... _ 
112 
1783 
15.90 
2$ 
Loss 
35$ 
Gain 
143 
V. 
Seed Exposed to Light 23 days, 4 months before planting. 
104 
2267 
21.79 
196 
VI. 
Stem End Rejected_ _ 
89 
1514 
17.00 
4$ 
Gain 
153 
Experiment VIII —Rose Seedling seed was used in this experiment which 
was from the No. l’s of last year’s experiment. It was planted on April 9th. 
The plants came up nicely and they were irrigated twice, still, most of them 
remained green until killed by frost. Some showed marked sun scald in¬ 
juries early in the season, which were soon followed by early blight. 
The field used in this experiment had been under cultivation for the 
past seven years. The soil is of a heavy clayey loam. This field has re¬ 
ceived very little manure during the past five years. The soil was too heavy 
for a desirable potato field. 
Plat I Check —The largest tubers from last year’s check plat were used 
for seed in this lot. Most of the plants remained green, but some of them 
had their subterranean parts badly injured and developed marked sun scald 
injuries. Three hundred and nine pounds of seed gave a return of 1,716 
pounds of tubers, or 5*4 pounds for every pound of seed planted. 
Plat II —This seed was selected from the No. 1 of a lot which had been 
treated with formalin last year. They were treated with corrosive sub¬ 
limate on April 30, and planted on May 9. These plants reached the surface 
of the ground about as soon as those of the check plat. No diseased plants 
were observed in this plat. Three hundred and thirty-four pounds of seed 
gave a return of 2,616 pounds of clean tubers, a yield of 7.8 pounds of tubers 
for every pound of seed planted, making a gain of 41% over check. 
Plat III —This seed was selected from the No. l’s of last year’s experi¬ 
ments. Only clean, round, smooth tubers were used. All long and all flat 
tubers were rejected. The soil of this plat was in a better condition than 
the soil of the other plats. No diseased plants were found in this plat, and 
the tubers were fully as clean and smooth as those of the treated lot. Two 
hundred and forty-six pounds of seed yielded 2,807 pounds of tubers, a return 
of 11 y 2 pounds of tubers for every pound of seed planted, giving a gain of 
106% over check. 
Plat IV —Seed in this lot was selected from the various lots of last year’s 
experiments. Only the long, smooth tubers were used. The plants 
were not so strong and vigorous as those of Plat III, but no diseased plants 
were observed in this plat. The tubers were all long, but only a few pointed 
ones were found at harvest time. One hundred and ninety-three pounds of 
seed gave a return of 1,283 pounds of tubers, a yield of 6Y 2 pounds of tubers 
for every pound of seed planted, making a gain of 20% over check. 
Plat V —This seed was selected from the No. l’s of the previous year’s 
experiments. At least 2*0% of them had a few sclerotia of Corticium on them. 
Many diseased plants were observed in the plat and the crop was rough and 
