56 BULLETIN 1287, U. S. DEPARTMENT OF AGRICULTURE 
In 1921 and 1922, selection of several additional varieties was started 
and some promising strains have been isolated. Selfing and cross- 
fertilization experiments were started in 1921, and this work was in- 
DED EIDE TE IE IE 
1000 1100 1200 1300 4400 1500 
MINTER JYUVLE/ 7° ae Be Es ee ee ee ed 
TURAE¥(C/.NOSE7Y) = : 
AMNPRA OLE. NO. /EE2) ; = 
SYNC MHL? 7 
FEL/SE (C1. NO. 1584) 
CONVERSE (Ch. WO.4/41) 
PKING OF 7S: 
AHERSOMC1L. V0. ZEQ) 
SHLOISH SELECT (Cl NO/74) 
PRKIVCG BEYIRLL 
COAST (C/. NO. 690) 
BLACK HULL (CH. VO0.878) 
GING LMMER* 
VERNAL(C/. NOSE 24) 
Fic. 28.—Average acre yields of the leading cereal varieties at the Akron Field Station during the 15-year 
period, 1908-1922, inclusive 
creased in 1922. More corn breeding of this nature is being planned. 
Many corn problems are unsolved in the dry-land areas, “and more 
scientific experiments for their solution are planned. Table 31 shows 
ACRE YIELD (POUNV OS) 
O 1/00 200 X00 #00 500 600 700 800 900 1000 Mae 1200 1300 /400 
Ben Ee 
AOINRELD bMIMTER HAHEAT ; : WA 
FELISE SPYING DUCA LYHEPAT 
CONVERSE SLAING COMMON MAEAT 
APIER SOM SPRING OATS 
WYRNA SPRING EFIRLEY 
CSAMVT WINTER RYE 
LERNAL SPRING CRANE 
Fic. 29.—A verage acre yields of the leading cereal varieties when grown at the Akron Field Station on corn- 
land and-on fallow in the five years, 1917, 1918, 1920, 1921, and 1922 
the annual and average yields of Akron White and the parental 
variety, Swadley, during the 5-year period, 1918-1922, inclusive. 
TasBLe 31.—Yields of Akron White and Swadley corn grown at the Akron Field 
Station, 1918-1922, inclusive 
Acre yield (bushels) 
Variety 
1918 | 1919 | 1920 | 1921 | 1922 | Average 
Akron Whites. 2. 92508. Set 2 As tee eae eee ee a ee POG On| tO Cia ROOM Leas y ete 31.0 | 33. 7 
WACO Yee cise. oo meet Sass os ee er 30.2 | 6.4 | 27.0 | 37.0} 110.7 | 22. 3 
1 Very poor stand, owing to injury by ground squirrels. 
