20 BULLETIN 430, U. S. DEPARTMENT OF AGRICULTURE. 
In 1915 the spring-wheat varieties were sown April 27 and 28 and 
May 4 in duplicate twentieth-acre plats. These were on corn stubble 
that had been double disked and harrowed once previous to seeding. 
Good stands were obtained on all plats. The spring was late, cool, 
and wet. The precipitation during the growing season was consid- 
erably above normal, due to the high precipitation of April. The 
entire growing season was cool and favorable to crop growth. Hail- 
storms on July 5 and August 17 probably did some damage to the 
spring wheats. However, the most serious damage was due to rust, 
which affected all the spring common varieties. The lowest yield in 
1915 was 9 bushels, from Crossbred (C. I. No. 3695), and the highest 
28.9 bushels per acre, from Beloturka (C. I. No. 1520). The average 
yield of the 15 durum varieties was 23.4 bushels, while the average 
yield of the 18 spring common varieties was 15.2 bushels per acre. 
Table XI shows the rank of the groups of spring wheats when 
arranged according to yields to be as follows: (1) Durum, (2) 
Preston, (3) unclassified (4) Fife, and (5) Bluestem. Table XI also 
shows certain agronomic data, including the average dates of head- 
ing and maturity, height, weight per bushel, yield, and the ratio 
of grain to straw, for the leading varieties of spring wheat grown 
on the Cheyenne Experiment Farm from 1913 to 1915, inclusive. 
TABLE XI.—Average dates of heading and maturity, height, weight per bushel, yields, 
and ratio of grain to straw, for 16 varieties of spring wheat grown on the Cheyenne Experi- 
ment Farm, 1913 to 1915, inclusive. 
| 
| | 2 
D — i er acre. 
a ate of eas Weight Yield per ac Ratio, 
Group and variety. N 6. oe ce al Height:| pel |S eee Shale 
Heading. |Maturity. bushel.) Grain. | Straw. | St @w- 
| 
Durum: Inches.| Lbs. | Bush. | Lbs. 
Beloturkate tse enn ae 1520 | July 13} Aug. 18 28 62. 0 16:2) 15.215 Hs d25 
Kebarnikae sss tees ele gs te 5 GyleaeG Ose aa= Aug. 17 27 61.5 15593) e222 11528 
Rererodka ety 2 a eS IZ50U Eee OC Osea Aug. 18 29 62. 0 15.6 | 1,395 1:1.49 
Keibantkay teat eee ee we eee 14405 See doses: Goss. 27 61.7 15.27) 15197 i Siksul 
Preston: 
IDE Nee eae qeemie eae aes 2397 | July 15 | Aug. 15 21 58.0 13.6 | 1,188 1:1.46 
RVeguEvuSSiamies soe ee eee 4141 | July 16 | Aug. 16 24 58. 0 12.5 | 1,273 teal 0 
Spring Durkeyes oso | 4154 | July 17} Aug. 17 25 60. 0 12.2} 1,240 1:1.69 
Unclassified: | : 
Galeal ose se epsee oer ....| 2898 | July 15 | Aug. 16 22| 59.2 13.1 983 1:1.25 
ID CHAN COMA Wie reer nes oat 3703 | July 18 |] Aug. 18 25 53.2 8.8} 1,063 1:2.01 
Fife: | : 
Colepihybrid ste eee eee 4062 | July 17 dome. 27 58.5 12.9 | 1,268 1:1.64 
ALG UISS eee nea ee Reyer t es 3641 | July 15 | Aug. 16 24 58.5 12.8] 1,056 IPS IL ey 
ChirkalS prime selene ae pty dibiliy. TS |), Cl@sssoc 25 56.5 10.8 | 1,015 IPS ie BY 
HER AVIS LLIN Deepens ste yeep ec 3022 | July 20] Aug. 18 25 54. 2 9.4 | 1,297 1:2.30 
Glyndon (Minn. No. 163).....| 2873 | July 18 | Aug. 19 23 Sond, 9:3) |l220 1:2.19 
Bluestem: 
Haynes (Minn. No. 169)....-- Pr 2s KODE Ss Cones 24 51.0 8.4 | 1,095 12 
Miata e eae Ate teense ee 3082 | July 21 | Aug. 21 25 53.5 7.0} 1,147 1:2.73 
1 Average for two years. 
The durum wheats have headed earlier than the sprmg common 
wheats, but have been a little later in maturing than the leading 
varieties of common wheat. The durum varieties also have grown 
taller, weighed more per measured bushel, yielded higher, and given 
a higher ratio of grain to straw than the spring common varieties. 
