46 BULLETIN 1260, U. S. DEPARTMENT OF AGRICULTURE. 
Dwarf hegari, and Sunrise kafir have made the best records. In 
grain production Dwarf hegari leads, with an average yield 31 per 
cent larger than the check. Next in relative yield are the Darso 
and Schrock sorghums, both hybrids with seed of somewhat lower 
feeding value than either of the other two varieties. Sunrise kafir 
and Dwarf hegari deserve consideration as dual-purpose sorghums, 
even though Dwarf milo is generally recognized as the leading grain 
sorghum in northeastern New Mexico. 
NORTHERN GREAT PLAINS. 
Sorghums are of little importance in this region outside of South 
Dakota. The limiting factors are both temperature and rainfall 
and in contrast to conditions in the southern Plains temperature is 
perhaps the most important. Only very short season varieties, like 
the Dakota Amber, mature with any degree of regularity, and even 
that variety is injured frequently by frost in the Judith Basin. 
Corn is preferred by farmers on account of its ability to grow at 
lower temperatures than sorghum and also because it usually pro- 
duces some grain. This is true even in most parts of South Dakota, 
where the sorghums outyield corn. 
The fodder yields obtained from sorghum varieties on departmental 
field stations in the Northern Plains are given in Table 13. Forage 
yields are also given for corn, in order that a direct comparison may 
be made of corn and sorghum under these conditions. 
The results at Redfield, Ardmore, and Newell, S. Dak., and at 
Sheridan, Wyo., plainly indicate that the early varieties of sorghum 
will produce larger yields of fodder than corn in South Dakota and 
the lower altitudes of northeastern Wyoming. Where sorghums will 
mature and make from 25 to 50 per cent larger yields than corn 
they should be used as silage and fodder crops in preference to the 
latter. 
In most parts of North Dakota and Montana corn ordinarily 
equals or surpasses the sorghums in forage yields. Minnesota Amber 
and Red Amber both outyielded corn slightly at Mandan, N. Dak. ; 
but neither of these varieties matured regularly, and immature sor- 
ghum fodder is poor in quality. The Dakota Amber sorgo matures 
in most seasons at Mandan, but its yields of fodder are almost 
exactly the same as those of corn. 
The difficulties attending the growing of sorghum in the Northern 
Plains are not fully apparent in the table of yields. Even at Red- 
field and Ardmore the Red Amber sorgo can not be depended upon 
to produce viable seed for the next year's crop. Farmers growing 
this variety would therefore be forced to ship in their seed from 
points farther south or east. Red Amber usually heads in South 
Dakota and develops sufficiently to make a fairly good quality of 
fodder. It seems probable, therefore, that the larger yields of Red 
Amber would justify the yearly purchase of seed. 
At the Judith Basin Field Station, Moccasin, Mont., the Dakota 
Amber sorgo has been under test for seven years and has never fully 
matured. In 1916 it had reached a height of only 12 inches when 
cut September 15, and in 1921 was only 2 to 3 feet high when struck 
by a kdling frost September 9. 
At Havre, Mont., the results have been similar to those at Moc- 
casin, and the average yield is only half that of corn. 
