SORGHUMS FOR DRY-FARMING 245 
in the United States for over half a century, but it 
was only when dry-farming began to develop so tre- 
mendously that the drouth-resisting power of the. 
sorghums was recalled. According to Ball, the sor- 
ghums fall into the following classes : — 
THE SORGHUMS 
1. Broom corns 
2. Sorgas or sweet sorghums 
3. Kafirs 
4, Durras 
The broom corns are grown only for their brush, and 
are not considered in dry-farming; the sorgas for 
forage and sirups, and are especially adapted fof irri- 
gation or humid conditions, though they are said to 
endure dry-farm conditions better than corn. The 
Kafirs are dry-farm crops and are grown for grain 
and forage. This group includes Red Kafir, White 
Kafir, Black-hulled White Kafir, and White Milo, all 
of which are valuable for dry-farming. The Durras 
are grown alinost exclusively for seed and include 
Jerusalem corn, Brown Durra, and Milo. The work 
of Ball has made Milo one of the most important dry- 
farm crops. As improved, the crop is from four to 
four and a half feet high, with mostly erect heads, 
carrying a large quantity of seeds. Milo is already 
a staple crop in parts of Texas, Oklahoma, Kansas, 
and New Mexico. It has further been shown to be 
