52 BULLETIN 981, U. S. DEPARTMENT OF AGRICULTURE. 
TaBLE XVIII.—Comparison of the composition of Sudan grass sced with that of the 
common cereal grains. 
Constituents (per cent). 
Grain. we 
F Nitrogen- 
Moisture.| Ash. cee Protein. crude nee 
= i mitotic extract. 
Sudanvonassiseede law re een See eee 10. 47 3. 09 3. 81 13. 62 5. 38 63. 63 
(ONY RS) pa Sas ai a a Sn ae eae ie PE Pa a 9. 20 3.50 4.40 12. 40 10. 96 59.60 
J BUEN Dy AS eee iain ees ee ae aly Eis ay as els Am aac 9. 30 2.70 2.10 11.50 4.60 69. 80 
SN VALVE Geers et recesre ote Ra anya tan ates aie 10. 20 1.90 2.10 12. 40 2.20 71.20 
(CHOSE Sete eh Se a ote ens Ee Rene Tree aeee™ RUA 10. 50 1.50 5.00 10.10 2.00 70.90 
CATS CCM retes ate are Coes cre ene nl on nee oP 11. 80 1.70 3. 00 11.10 2.30 70.10 
1 The analysis of Sudan grass seed was made by Dr. G.S. Fraps, of the Texas experiment station; all 
other analyses were taken from Henry and Morrison (10, p. 633-635). 
SEED PRODUCTION. 
The production of Sudan grass seed in the United States is a 
matter of considerable importance, not only because most of the 
acreage will always be cut for hay, but because good, pure seed is 
obtained only when care is used in its production. 
LOCALITIES ADAPTED TO SEED PRODUCTION. 
Ever since Sudan grass became a crop of importance, northwestern 
Texas has been the center of production for the seed. The total 
production of Sudan grass seed in the United States in 1914 was 
estimated at 5,000,000 to 6,000,000 pounds, approximately 3,000,000 
pounds of which were produced in the vicinity of Lubbock, Tex. 
There have been almost no failures of Sudan grass in this part of 
Texas. East of the ninety-eighth meridian in Texas, seed production is 
uncertain, however, owing to the presence of the sorghum midge (17). 
Kansas and Oklahoma rank next to Texas in the production of 
Sudan grass seed. (See the map, fig. 22.) The sorghum midge is 
not troublesome in either of these States, but drought often causes 
a short seed crop. In the irrigated regions of Colorado, New Mexico, 
Arizona, and California the seed yields are heavy and the quality of 
the seed first class, but only limited quantities are grown under these 
conditions, owing to the high price of the land and the profitable re- 
turns from other crops. Yields of more than 2,000 pounds of seed per 
acre have been reported from California and Arizona, and 1,700 pounds 
from the vicinity of Lubbock, Tex., but the average in both regions 
is much less. In other parts of the United States 300 to 500 pounds 
of seed per acre is all that should be expected, as will be observed in 
Table XX. The results in the growing of Sudan grass for six years 
indicate that the seed can be produced successfully in ali but the 
States farthest north, where the seasons are too short, and the South- 
eastern States, where the sorghum midge is present. 
