50 BULLETIN 1173, U. S. DEPARTMENT OF AGRICULTURE. 
fallowed ground the rate of sowing of winter wheat may not be an 
important factor in influencing yields. From the standpoint of 
the farmer, however, there is a considerable advantage in sowing 
the wheat thickly enough to insure good stands. A thin stand of 
wheat allows so much space for weeds to grow that yields may be 
reduced on that account. Thick sowing, therefore, has the advan- 
tage of suppressing weed growth. 
TABLE 30.—Annual and average yields of Turkey winter wheat in the rate-of-sowing 
experiments conducted at Moro, Oreg., in the 8-year period from 1914 to 1921, inclusive. 
Annual, total, and average yields per acre (bushels).1 
Rate of 
seeding. | Average. 
| 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 | 1921 | Total. 
Actual.| Net. 
| | ; 
2peckseee=. bs B26 15.4 43.7 21.1 18.4 2848! 33.2 36.6 214.3 26.8 26. 3 
3 pecks..... 12.6] 15.0 38.4 23.6 20.7 34.6 SYell 41.1 220. 1 27.8 27.0 
4 pecks..... WA 1827 ap aat 25.4 21.8 32.8 34.8 AZ 2) \e2eono 27.9 26.9 
B Pecks* sce 13.3 19.5 34.9 28.0 21.3 | . 38.9 38.0 41.2 235.1 29.4 28.2 
6 pecks..... 16.4 20.0 28. 3 28.0 24.8 36. 8 35. 8 39.3 229. 4 28.7 Zis2 
7 pecks..... Wiedale “2053 29.9 26. 2 26.3 | 38.9 Stat 39.6 | 236.4 29.5 dake 
8 pecks..... Weed 20. 8 31.0 24.0 28.0; 34.8 | 38.8 40.1 235.0 29.4 27.0 
_ 1 For 1914 and 1915 the yields are averages obtained from duplicate tenth-acre plats. For 1916 to 1921, 
inclusive, the yields are averages obtained from the three twentieth-acre plats used for the three earliest 
dates of sowing each year. 
SPRING WHEAT. 
Experiments combining rates and dates of sowing have been con- 
ducted with Pacific Bluestem wheat at Moro in the seven years 1912 
to 1918, inclusive. This variety was sown early and late in the 
spring at rates varying from 2 to 8 pecks per acre. After 1918 only 
the early date was used. In 1919 this variety was sown at rates 
varying from 4 to 8 pecks, and in 1920 at rates from 5 to 8 pecks. 
The results of this experiment are shown in Table 31. 
TABLE 31.—Annual and average yields of Pacific Bluestem spring wheat at Moro, Oreg., 
sown early and late in the spring at rates varying from 2 to 8 pecks in part or all of the 
years 1912 to 1920, inclusive. 
Annual, total, and average yields per acre (bushels). 
Time and rate Average. 
of seeding. : = 
1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 /Total. 7 years,| 9 years, 
1912 to | 1912 to} Net. 
1918. 1920. 
2 | — mee 
Mar.| Mar.| Mar.| Mar.) Mar.| Apr.| Mar.| Mar.| Apr. Mar. 
Early spring: 95. | Bb) BOLE BBS oN SIL | — 5. 7h 19. a> BI oe 27. 
2 pecks'...... 4.0% 1850) ERO TSG 23520 Dees. ae Beene 112.6 TOS Aa eee 15.6 
3 pecks .~.... 858 1 LS: | L5s5M ABS6s 2353) Ths2) | Loata see Sales ee ee 114.6 16:-4))|segseeee 15.6 
AeECKS es. -- 13662122058 || l455)4) eb: 23-0) db. fa] aera) 2210 el ee 142.6 Lier eee eee 16.1 
o peeks<). =... - 12.57) 21.3 | AGS.) £752) 23.0) | 17.9) 18.0) | 2408 1836) a 18.2 19:0=). Liven 
6 pecks.-— ©. 10.5 | 18.3 | 16.3 | 20.6 | 19.3-} 18.1 | 18.0 | 22-9 | 16.7 |160. 7 17.3 17.9 | 16.4 
Mipecks* 22" 13.1 | 20.0 | 17.3 | 18.0 | 19.3 | 17.3 | 15.3 |°22.8 | 49.8 |162.9 17.2 18.1 16.3 
8 pecks...... 13.1 | 20.0 | 18.1.| 19.2 | 24.0 | 20.8 | 15.5 | 23.6 | 18.5 |172.8 18.7 19.2.) N72 
Apr.| Apr.| Apr.| Apr.| May | Apr.| Apr. Apr. 
Late spring: 96.| 96. | 16. | 16. | 1. | 28. | 92. 93. 
Zipecksiaee 7.8 | 10.5 | 13.7 | 10.4 | 18.8 | 14, foe a (odl SE Salts Ss ee 85.6 122 jeer eee TST 
SIPCCKS nce 15.5 | 10.0 | 11.7 | 10.4 | 2055 US case aos dll eee Pe ag 91.1 13. Ol See see 12.3 
4 pecks...... URS Tet “Seat MSA ASE Sel WG ree See |) La OPE 86.0 1232 Sees 11.3 
5 pecks. ..... 14508) es) |) 5.36) L005) 2246) | Asesalel 250s esa. S- 5 ee 85.3 LZ. 2 Sse SES 11.0 
6 pecks...... Pa eSeon|| oat. | Adee | 20! ool Lee ool kegel eee [dete 84.2 12: Ol | baceeecs 10.5 
a peckS2s-. 2 5s 1 MOR) ALO 12877 4 0250) Or zee pS Sees = 84.4 12. eee 10.4 
Specks a5. -2 1 15.5 | 13.1 Be th 1052) ONG) ES) UO a eee se ae eye 84.9 12 es ee 10.1 
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