GRAIN-SORGHUM EXPERIMENTS IX OKLAHOMA. 27 
experiments. In two of the eight years, 1917 and 1919, Sunrise 
kafir produced more than one sueker per plant. The average for 
the eight years was 68 suckers per 100 plants. 
The number of days in the vegetative period has varied from 66 
days in 1915 to 108 days in 1917. the 8-year average being 79 days. 
The ripening period varied from 34 days in 1918 and 1921 to 45 
days in 1915. the average for the eight years being 39 days. A long 
ripening period is caused by plenty of moisture after heading. The 
total growing period required to mature Sunrise kafir varied from 
103 days in 1921 to 150 days in 1917, the 8-year average being 
118 days. 
The relation between percentage of stalks headed and grain yield 
in Sunrise kafir does not show the same correlation as in the milos. 
This indicates that while kafir usually produces a good percentage 
of headed stalks the yield of grain is dependent on the filling of the 
heads rather than on their number. 
The height of the plants has varied from 4.5 feet in 1914 to 7.3 
feet in 1915. the 8-year average being 6 feet. The height of Sunrise 
kafir makes it unsuitable to head by hand in the field, but it is well 
adapted to harvesting with a corn binder. 
The grain yields for the eight years show but two kinds of years, 
good years when a yield of more than 30 bushels per acre was 
obtained and poor years when the yield was 10 bushels or less. On 
this basis there have been five good seasons and three poor seasons 
for Sunrise kafir during the 8-year period. The 8-year average 
yield of grain per acre was 26.3 bushels, which is higher than the 
average yield of any other variety of grain sorghum that has been 
grown during the entire 8-year period. The average total crop 
yield per acre indicates that Sunrise kafir also is a good variety for 
forage or silage production. 
DAWN KAFIR. 
Dawn, or Dwarf, kafir (C. I. Xo. 340) originated in 1906 from 
the same head selection as Sunrise. The chief differences be- 
tween Dawn and Sunrise kafirs are that Sunrise is taller, the heads 
usually are better exserted, and the stalks also are juicier and sweeter. 
Dawn kafir has been grown alongside of Sunrise at Woodward since 
1914. The experimental data for both varieties are shown in Table 
9 to give an opportunity for easy comparison. 
A study of Table 9 shows that the variation in space per plant 
has not been so great for Dawn as for Sunrise kafir, the variation 
in plant space of Dawn ranging from 12.2 inches to 9.1 inches, with 
an 8-year average of 10.9 inches, practically the same as for Sun- 
rise. The row space per stalk has been slightly greater for Dawn 
than for Sunrise, the average for the eight years having been 7.2 
inches. From a comparison of the row space of plants and stalks 
for these two varieties, it is readily seen that Sunrise has a tendency 
to produce more suckers than Dawn. In the 8-year period Dawn 
kafir produced 59 suckers per 100 plants. 
In length of the vegetative, fruiting, and total growing period- 
Dawn and Sunrise kafirs have been practically identical. In only 
one year, 1916, was there any discernible difference between the 
two varieties, Dawn kafir then requiring two days more to mature 
than Sunrise. 
