42 BULLETIN- 976, U. S. DEPARTMENT OF AGRICULTURE. 
(4) In the 6-year period from 1914 to 1919, inclusive, Dwarf milo 
in rows spaced 3^ feet apart, made the highest average yield, 30.8 
bushels, with 12 inches of row space to the plant. In rows spaced 
7 feet apart during this same period, the highest average yield, 33.2 
bushels, was made by the plants spaced from 8 to 12 inches apart in 
the row. 
(5) The rows spaced 7 feet apart with 6 inches of row space to the 
plant averaged 32.8 bushels per acre in this 6-year period, which is 2 
bushels more than was made by the corresponding rate in rows spaced 
3^ feet apart, and practically the same average yield as obtained 
from the 8 to 12-inch spacing. 
(6) Spacing the rows 7 feet apart is a slightly surer way to grow a 
grain crop than spacing them 3^ feet apart, but the latter method 
will produce a higher average total crop yield. 
(7) Dawn kafir produces the highest average yields from plants 
with 15 to 19 inches of row space in rows spaced 3^ feet apart, and 
from plants with 4 to 5 inches of row space where the rows are spaced 
7 feet apart. The 6-year average yields from these rates were 23.2 
and 23.9 bushels, respectively. 
(8) Dwarf milo seed grown at the Arhngton Experimental Farm, 
Va., produced as high yields and a crop otherwise as good at Ama- 
riho, Tex., as home-grown seed. 
(9) Feterita seed grown at the Arhngton Experimental Farm, 
Va., and sent to Amarillo, Tex., averaged 4 bushels more than the 
home-grown seed in the 6-year period from 1914 to 1919, inclusive, 
and Dawn kafir from the same source averaged 2.6 bushels higher 
in this same period. 
(10) The yield data presented from all the experiments show con- 
clusively that Dwarf milo is by far the better variety to grow imder 
conditions such as those at the Cereal Field Station, Amarillo, Tex. 
(11) In the environmental experiments in which Dwarf milo, 
feterita, and Dawn kafir were growTi for several years at the Arhngton 
Experimental Farm, Va., Amarillo, Tex., and Chico, Cahf., from seed 
produced at each of the three stations, it was shown that the source 
of seed had practicaUy no influence on the growth of the crop and 
on yield. Chemical analyses of samples from these crops showed 
that environmental conditions, such as soil and climate, had much 
more influence on the chemical composition of grain-sorghum seed 
than did the sources of the seed from which the crop was grown. 
