236 
ELEMENTARY AGRICULTURE 
cured, they should be stored in a dry place, where they 
will not heat or mold. Discolored or brittle brushes 
are of an inferior grade and are not very valuable for 
making brooms. Seeding, grading, and baling, are profit¬ 
able to secure the highest prices. Broom corn should 
not be grown near other sorghums, because it crosses 
during pollination, producing an inferior product. It 
Fig. 172.—Cowpeas in the field. 
is suggested that the grower of broom corn start with 
a small field, learning the business as it develops. 
GRASSES 
Sudan grass was introduced into America by the 
United States Department of Agriculture, and was first 
planted at the experiment station, at Chillicothe, Texas. 
Less than one-half pound of seeds was imported from 
Khartum, in the Sudan Region of Africa. This seed 
has been the source of a very valuable crop. 
Sudan grass is similar to Johnson grass in general 
appearance, but it is an annual, growing from seed each 
