14 
Colorado Experiment Station 
readily with the Ambers or other sorghums, showing its close relation¬ 
ship. 
Of the Ambers, the Black is the best variety. Altho in our 
experimental work at Cheyenne Wells, the White did well, it was not 
equal to our local strains of Black Amber. The Amber sorghums are 
best adapted to the southeastern portion of the State although they do 
well in the extreme eastern portion. They are less well-adapted 
as the altitudes rise close to the mountains, but even here they may be 
grown to some extent. 
Sudan Grass has been tried in the State for 3 years. It was 
imported from Khartum in 1909. Sudan is a province in Central 
Africa, of which Khartum is the leading city. On this account the 
Department of Agriculture officials called the grass Sudan Grass. This 
grass has been tested for 3 years in Colorado and has given promise 
of being the best adapted hay crop of the forage sorghum types. It 
matures in a shorter season than Amber, stands drouth well, and grows 
vigorously. Its yield will, of course, be largely according to the mois¬ 
ture supply available and it will vary from i to 8 or 9 tons. 
The latter yield is only possible under irrigated conditions. Sudan 
