26 



BULLETIN 836, IT. S. DEPARTMENT OF AGRICULTURE. 



Acme stands first, with an average 

 (C. I. No. 535), is a close second, 

 This selection leads the next highest 

 by 4 per cent, while the other two 

 other Dwarf, grown in that period, 

 cent each. The percentage of good 

 Acme, and Dwarf varieties is shown 



of 88 per cent, while the Dwarf 

 with an average of 87 per cent, 

 selection, Dwarf (C. I. No. 442), 

 varieties, one Standard and the 

 tie for fourth place, with 80 per 

 brush produced by the Standard, 

 graphically in figure 7. 



Table VIII. — Annual and average acre yields of all lots of broom com grown in 

 varietal experiments at the Woodward (Okla.) Field Station during periods 

 of varying length in the five years from '191.'i to 1918, inclusive. 





Annual acre yields (pounds). Average yields. 



Variety. 



1914 



1915 



1916 



1917 



1918 



2- years, 1917 

 and 1918. 



5 years, 1914 

 to 1918. 





Good. 



Poor. 



Good. 



Poor. 



Good. 



Poor. 



Good. 



Poor. 



Good. 



Poor. 



Good. 



Poor. 



Good. 



Poor. 



Standard: 

 C. I. No. 



556 

 C I. No. 



580 



225 



75 



440 



235 



366 



39 



350 

 160 

 200 



394 



328 



378 

 378 

 444 



31 

 45 

 33 



39 



72 



72 



45 



275 

 356 



30 

 22 



312 

 258 



30 

 33 



331 



82 



C I. No. 

 588 



















Acme: 



C. I. No. 



243 

 Dwarf: 



C. I. No. 



442 



C. I. No. 



535 

 C. I. No. 



557 



C I. No. 



559 



305 



275 

 225 

 250 



20 



20 

 20 

 100 



600 



511 

 683 

 650 



155 



83 

 122 

 205 



378 



2S3 

 433 

 361 



55 



117 

 50 



78 



283 



188 

 239 

 294 

 75 

 178 

 278 

 294 



28 



37 

 50 

 28 

 10 

 22 

 44 

 25 



338 



258 

 308 

 336 

 259 



33 



54 

 61 

 52 

 27 



392 



317 

 392 



387 



59 



66 

 63 

 98 



C. I. No. 

 564 



















C I. No. 

 595 















365 

 411 



80 

 50 



321 

 352 



62 

 37 







C. I. No. 

 597 





















1 















DATE-OF-SEEDING EXPERIMENTS. 



A date-of-seeding experiment with Acme broom corn was con- 

 ducted each year during the 5-year period from 1914 to 1918, in- 

 clusive. The plats used in this experiment were one-tenth acre in 

 size. Seeding was done at intervals of one to two weeks. In 

 1914 the experiment included only three different dates. These 

 were increased to four dates in 1915, to six dates in 1916, and to 

 seven dates each in 1917 and 1918. 



Table IX shows the agronomic data for Acme broom corn in the 

 date-of-seeding experiment. It will be noted in this table that the 

 stands obtained in the different dates of seeding in the same year 

 and in the different years are comparable in almost all cases except 

 those of the last date, July 3, 1917, and the first three dates in 1918. 

 The thin stand in the former case was due to the dry condition of 

 the soil and to high temperature at and following the date of seed- 



