BROOM-CORN EXPERIMENTS AT WOODWARD, OKLAHOMA. 45 
plant to 4.5 inches of row space in rows 3.5 feet apart and of one 
plant to each 2 or 3 inches where the rows were 7 feet apart, or 
35,200 plants to the acre. The highest annual yield of good brush, 
775 pounds, at this rate was made in 1915, by method 1, with 
rows spaced 3.5 feet apart and one plant in each hill. This method — 
also made the lowest yield, 180 pounds, in 1918. It has the lowest 
average yield in the 3-year period from 1916 to 1918, inclusive, and 
ranks second in the 5-year period from 1914 to 1918, inclusive. The © 
highest average yield in the 3-year period was obtained by the use 
of the method of grouping four plants in each hill in rows 3.5 feet 
apart. This method was employed only during that period. The 
method of spacing the rows 7 feet apart with one plant in each hill 
gave the highest annual yield in 1914 and in 1918, but it ranks third 
in average yield in both the 3-year and the 5-year periods. 
Group B represents an average of one plant to 6.5 inches of row 
space where the rows were 3.5 feet apart or half as many inches 
where the rows were 7 feet apart, or 24,400 plants to the acre. In 
this rate the first method, spacing one plant in a hill in rows 3.5 
feet apart, gave the highest annual yield in three years of the 5-year 
_ period and in average yield ranks first in both the 3-year and the 
5-year periods. The second method, with two plants in the hill, made 
the highest yield in only one year, 1916, but it ranks second in aver- 
age yield in both periods. By the fourth method, or spacing the 
rows ¢ feet apart, much lower yields were made than by any of the 
others in nearly ali years, which gave it a low rank in both periods. 
Group C represents a stand of one plant to 9.5 inches of row 
space in 3.5-foot rows or about 5 inches in rows 7 feet apart, or 
16,700 plants to the acre. At this rate, the crop grown in rows 
spaced 3.5 feet apart gave a much higher yield than when grown in 
rows spaced 7 feet apart. The second method, or grouping two 
plants in the hill, gave the highest yield in two years of the 5-year 
period. This gave the first method the highest average in the 3-year 
period from 1916 to 1918, inclusive, and the second method the high- 
est average in the 5-year period from 1914 to 1918, inclusive. 
Group D has a stand of 12.5 inches of row space to the hill or its 
equivalent in 7-foot rows, or 12,600 plants to the acre. At this rate, 
as in the previous one, the crop grown in rows spaced 3.5 apart 
gave a higher yield than when grown in rows spaced 7 feet apart. 
The first method, with one plant in the hill, gave the highest yield in 
three years and ranks first in the 5-year average. The second method, 
with two plants in the hill, produced the highest yield in two years 
in the 5-year period and ranks first in the 3-year average. 3 
Group E has an average of 18.5 inches of row space to the plant or 
its equivalent in 7-foot rows, or 8,500 plants to the acre. This rate 
