8 The Colorado Experiment Station. 
menace to the industry in the State. As a working hypothesis we 
have assumed that this trouble is due to some of the changes which 
the plant has undergone in being brought from a humid to a dry 
climate. In order to investigate this, a small area of both early and 
late celery was set in the College gardens at Fort Collins. The 
plants for this experiment were sown in flats in the green house, 
then pricked from the flats as soon as large enough into benches, 
i j/2 to 2 inches apart each way. This gave sound, stocky plants 
for setting in the field. Great care was taken from the time the 
seed was sown that these plants did not suffer for water. Plants 
were set in the field May 27th and 28th. This date is rather early 
for Giant Pascall, which is intended for late crop, but was set 
early in order to induce the plants to go to seed if there was any 
tendency in that direction. The Golden Self Blanching, was set on 
either side of a ditch, making two rows about 12 inches apart. 
Plants were set 8 inches apart in rows. The Giant Pascall was set 
in single rows six feet apart, eight inches apart in the row. These 
plots were given clean cultivation at intervals of about one week, 
with a twelve tooth Planet Junior cultivator. The soil in these 
plots was kept thoroughly moist. In order to do this, irrigation 
was given at intervals of from three to five days during the whole 
summer. This kept the soil more moist than would be desirable for 
most plants. The Golden Self Blanching was bleached by tieing 
up the plants individually with old news papers. This method of 
bleaching proved satisfactory, except where the papers were tied so 
tightly that the new shoots in the center of the plant were prevented 
from making their way to the top. In these cases the new shoots 
doubled up and in crowding started decay. No plants of this 
variety showed any signs of sending up seed stalks. Nearly all 
of this was marketed during August. The Giant Pascall was left 
to grow until rather late in the season. In September furrows were 
turned to the rows and left for two or three weeks, then early in 
October the larger part of the plot was taken up and set in a 
trench for bleaching. This trench was prepared by throwing out a 
double furrow with a plow and then shoveling out the loose soil so 
the trench was made about 18 inches deep, and two feet wide. In 
this the celery was trenched, three plants wide and as close to¬ 
gether lengthwise in the trench as the roots of the plant would per¬ 
mit. After setting in the trench water was allowed to run through 
the trench to firm the soil around the roots. The trench was then 
covered with corn stalks, and later with straw, old tomato vines 
and earth. A part of the plot was left where grown. These plants 
were banked sufficiently high to bleach, then as cold weather ap¬ 
proached were covered with tomato vines, straw, etc. A few plants 
were also taken from the soil and placed in half barrels in the 
