28 BULLETIX 976, V. S. DEPAETMEXT OF AGEICL^LTUEE. 
plant. The four intermediate rates ranged from 4.5 to 9.4 inches 
to the plant. In 1916 the first five rates ranged from 2.1 to 7.5 
inches of row space to the plant in the different rates. The sixth 
rate was abnormally thin, averaging 26.4 inches of row space to the 
plant. In 1917 the rates ranged from 3.1 to 12.2 inches of row 
space to the plant. In 1918 the thick rate had 1.5 inches of row 
space to the plant and the thin rate 12.7 inches, with the fom* inter- 
mediate rates ranging from 2.5 to 6 inches of row space to the plant. 
In 1919 there were only five rates, the first two plats having the 
same stand. The thick rate had a stand of one plant to 2.7 inches 
of row space, while the thin rate was abnormally thin, averaging 
one plant to 22.6 inches of row space. In the three intermediate 
rates the row space to the plant ranged from 6.5 to 16 inches. 
The average stalk space in the different rates does not show the 
wide range that the plant space does. This is due to the difference 
in the number of suckers produced, the thin rates having the larger 
number. The percentage of suckers varies from year to year, but 
usually increases as the stand decreases. 
The percentage of erect heads ran high in most plats in aU the 
years. Thin stands have a tendency to produce pendent heads, 
though conditions during heading time influence their production. 
The total crop yield ranges from 7,730 pounds from the rate with 
4.5 inches of row space to the plant in the favorable season of 1915, 
to 900 pounds from the 12.7-inch rate in 1918. It varies greatly 
from the different rates in the same year, and from the same rates 
in different years. In the favorable seasons of 1915 and 1919, the 
thicker rates produced best, while in the less favorable seasons of 
1914, 1916, and 1917 the thinner rates yielded highest. The high 
grain yields can not always be correlated with high total crop yields. 
This may be due in part to the development of suckers. A produc- 
tion of suckers which do not develop heads may increase the total 
crop yields, but the percentage of grain may then be less than in 
cases having fewer suckers and a higher percentage of stalks bearing 
heads. To determine the best rate of seeding it is necessary to study 
averages which cover a series of vears. These are shown in Table 
XIII. 
The annual and average acre yields of Dwarf milo in rows spaced 
7 feet apart are sho^vn in Table XIIL Four rates are here repre- 
sented. In the first or thick rate, the space per plant ranges from 
2 to 3 inches in the different years : in the second rate, from 4 to 4^ 
inches: in the third rate it is approximately 6 inches: and in the fourth 
it ranges from 8 to 12 inches. 
Seasonal conditions play an important part in the grain yields. 
In the four years from 1914 to 1917, wliich include one fair, one good, 
and two poor seasons, the average is in favor of the thin rate. In the 
