GRAIN-SORGHUM EXPERIMENTS IN THE PANHANDLE OF TEXAS. 89 
farm value, therefore, Dawn kafir and Sunrise kafir should be given 
second place, taking precedence over milo and feterita. Figure 13 
shows graphically the annual and average yields of Blackhull kafir, 
Dawn kafir, and Red kafir in the 9-year period from 1908 to 1916, 
‘inclusive, at Amarillo, Tex. 
— ane eee : 
Fic. 13.—Diagram showing the annual and average acre yields, in 60-pound bushels, of Blackhull kafir, 
Dawn (dwarf) kafir, and Red kafir at the Amarillo Cereal Field Station during the 9-year period 
from 1908 to 1916, inclusive, 
CONCLUSIONS. 
The data presented in this bulletin warrant the following con- 
clusions: eon 
(1) Many varieties produce well in favorable seasons. Only well- 
adapted varieties produce well in the less favorable and unfavorable 
seasons, which comprise about three-quarters of the total number. 
(2) Karliness is the most important single factor in the varietal 
adaptation of grain-sorghum crops to the conditions obtaining in 
the high plains of the Texas Panhandle. 
(3) Dwarfness is the next most important factor in the adaptation 
of these crops. ; 3 
(4) The combination of earliness and dwarfness is extremely 
efficient in insuring adaptation to environmental conditions which 
include frequent periods of drought. 
(5) Dwarf milo, Dawn (dwarf) Kafir, and Sunrise (early) kafir are 
shown to be well-adapted varieties. 
(6) Dwarf milo and Dawn kafir are meeting with wide approval 
on the farms of the high, dry plains. 
(7) Germination and stand are governed largely by local con- 
ditions at sowing time. 
(8) Tillering, or the production of suckers, is a varietal or group 
character to some extent. In part it is correlated with stand and 
seasonal conditions. : 
(9) The production of erect heads is largely a group or varietal 
character, but is influenced by the same factors as tillering. 
