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Ross Bros. Co., Seeds and Agricultural Implements 
Maine-Grown Certified Seed Potatoes 
CULTURE. Cut the seed into pieces containing two or three 
eyes. Plant in rows 3 feet apart, and drop 15 to 18 inches apart in 
in the row. One-half peck of Potatoes should be sufficient to plant 
100 feet of row; ten to twelve bushels of seed are required per acre. 
Cultivate constantly and thoroughly, and work the soil well up 
around the plants. Spray for both insects and blight. 
What “Certified Potatoes” Means 
It means as much to the planter as pure bred stock 
means to the live stock breeder. Certified stock brings 
to you seed that will increase your yield and produce 
potatoes practically disease free. This means increased 
profit to the grower. Certified seed costs very little more 
and considering the additional value of the crop this 
increased cost is of no importance. 
Plant Certified Seed 
Each season we find more attention being given by 
the planter to the selection of seed potatoes and it is 
through this care that some of our own Worcester 
County farmers have produced unusual crops of pota' 
toes of excellent quality. A tremendous amount of work 
has been done for the production of Certified potatoes 
in our Northern New England States and as Maine 
has been and is at this time our heaviest potato pro- 
ducing state, much of the work in certifying has been 
carried on by the Department of Agriculture there. 
Our seed stock, grown in Aroostook County, Maine, 
by some of the state’s best growers, comes to you each 
full sack bearing the certification tag as an insurance 
of quality and disease-free seed stock. 
Certified Gold Coin 
Productive and of unsurpassed quality. Very uniform 
in size, never overdarge, but few small tubers. Form 
oblong, rather broad and thick. Skin almost white, with 
just enough of a light golden tinge to make it distinct 
from the white-skinned varieties and having that rich 
russet appearance generally considered an indication of 
good quality. Vine of strong, vigorous growth, not 
easily affected with blight. 
Certified Green Mountain 
A white skinned variety of flat, oval form, smooth 
and attractive. Ripens slowly and is a good keeper. 
Quality excellent when well grown. This variety has 
been growing in popularity and is now the leader of all 
varieties for general crop. 
Potato Prices 
Subject to Change Without Notice 
Irish Cobbler. 
Certified Irish Cobblers 
An early, white-skinned variety, very short, thick, 
inclining to round. This is yearly increasing in popu¬ 
larity for the early market. Ready for market about ten 
days earlier than the Early Rose; tubers are uniformly 
larger and in average production of large crops it is not 
equaled by any of the extra early varieties, nor greatly 
surpassed in yield by any of the main crop varieties. 
The vine is very stocky and vigorous, not as liable to 
be affected with blight or to suffer by drought as most 
others. A dependable early variety. 
Certified Spaulding Rose 
(Medium early). Practically free from blight and 
rot. It yields well in all climates and is in one section 
of Florida being planted almost exclusively. In color 
resembles the Early Rose, shape similar, inclines to the 
oblong and is thicker. 
Selected Early Rose 
(Early). Its tubers are roundish, oblong and some¬ 
what flat, while the skin is flesh-colored or pink. Not as 
prolific as some of the later sorts, but is extremely early. 
100 lbs., $2.50; 60 lbs., $1.60; 30 lbs., 85c; 15 lbs., 50c. 
Selected Carman No. 3 
A handsome, round white variety of the best qual¬ 
ity; large, almost no small tubers. Claimed by the in¬ 
troducer to outyield any potato of its class. Vines large 
and vigorous, not troubled by bugs, or blight as much 
as those of other sorts. 100 lbs., $2.25; 60 lbs., $1.45; 
30 lbs., 80c; 15 lbs., 45c. 
Certified Seed 
100 lbs., $2.25; 60 lbs., $1.45; 30 lbs., 80c; 15 lbs., 45c. 
Green Mountain. 
FORMALDEHYDE. Prevents potato diseases 
and insures a clean healthy crop. 
Directions for treatment of potatoes for 
common scab, black scurf or rhizoctonia and 
black leg. Cold method. 
Soak the uncut tubers 1J/2 hours in solution 
of one pound formaldehyde in 30 gallons of 
water. If tubers are first dipped in or sprinkled 
with water, then covered with burlap sacks to 
keep them moist for a day or two before treat¬ 
ment, soaking period may be decreased to 
one-half hour and the effectiveness increased. 
See page 60. 
NEW IMPROVED SEMESAN BEL for seed 
potatoes. For white potatoes Semesan Bel is 
valuable for combating seed-bourne rhizoc¬ 
tonia and scab, and also for protecting the 
seed against rotting. The application is 
simple and requires very little extra labor. 
Directions for use with each package. See 
page 60. 
