68 BULLETIN 1301, U. S. DEPARTMENT OF AGRICULTURE 
EXPERIMENTS WITH CEREALS 
EXPERIMENTAL CONDITIONS 
It is important to determine what varieties of cereals are best 
adapted to the locality. In crop-rotation experiments a single 
variety of each crop is grown under different rotation and tillage 
methods to determine the best farm practice in soil preparation. 
In varietal experiments with cereals different varieties are grown under 
the same soil conditions to determine the best variety for the locality. 
Varietal experiments with wheat, oats, and barley were begun at 
Mandan in 1916. The previous treatment of the land varied in dif- 
ferent years. The wheat varietal experiments in 1916 were sown on 
flax land plowed the previous fall; in 1917 they were sown on spring- 
plowed cornland, in 1918 on breaking, in 1919 after corn, in 1920 
after millet, and in 1921 and in 1922 after corn. The land in every 
case was double-disked and harrowed in the spring before seeding. 
The oat and barley varieties in.1916 were sown on fall-plowed flax 
land, in 1917 on breaking, in 1918 on fallow, in 1919 after sorgo and 
millet grown in cultivated rows, in 1920 after sorgo grown 1n culti- 
vated rows, in 1921 after Llamantia in rows, the ground having been 
plowed early in the fall; and in 1922 after sunflowers, sorgo, and corn 
erown in cultivated rows. The land was double-disked and harrowed 
before seeding each year, except in 1920, when a spring-tooth harrow 
was used to stir the soil. Although the previous crop and prepara- 
tion of the soil varied from year to year, all varieties in each experi- 
ment received the same treatment. 
EXPERIMENTS WITH WHEAT 
Annual and average yields of the spring-wheat varieties grown in 
plats from 1916 to 1932, inclusive, are shown in Table 26. Four 
varieties of common wheat, Marquis, Preston, Power, and Haynes 
Bluestem, and two amber durum varieties, Kubanka No. 8 and 
Arnautka, were grown each year from 1916 to 1921, inclusive. 
TABLE 26.—Annual and average yields of varieties of spring wheat grown at the 
Northern Great Plains Field Station during the 7-year period, 1916 to 1922, 
inclusive 
Yields per acre (bushels)- Average 
1916 1920 1991 
1916.} 1917 } 1918 | 1919 | 1920 | 1921 | 1922 | to to and 
| 1922 ; 1922 | 1922 
Class, group, and variety ee 
Fife. HARD RED SPRING 
[poll a Se 2AS Osis; Zola 10 
IMP RRO ee Se ae ee ES 3641 | 12.5 Sse ls Oneh lag 9.4 10.3 
ROWE sen foe eee 3697 8530] 48g 2807 |) (351 S22 IS aise ost te6 9.5 10. 2 
RedJBODS ae ae eee ee eae 6255. |) 2-22 | ee ee ee te oe a ee 5.1L. 15203 OF eee ee 12.6 
RUDY ee aan ee GO4 T= ee es ere ic oe eee aes 4595 16:41 Ae 10. 7 
Bluestem: 
El aynes eae ees tee 2874, || S655 elOssa let LLG! OsSul i ee Met fy Ses! Cee 
Preston 
KCOLAE= 2270S is FER Res Sh G248 i AC Se ees UE pe ee 9.2 4. 4ut 18: Gare 10.7 18 ess 
IBReStOM: == ee ee ee 3081 9.7 | 13.8 | 19:9 } 14.4 7.8 582> | IVE Oe bela tee ees 11.4 
Miscellaneous: | 
Hard Federation ------_-----| ATM oa [pests Sen Oe aed ee SRE 6:7 |Site eee Fehrs: 
Kubanka: DURUM | | | 
BAN CTT Ge Be care cee te eet NM 52845) = eee ese eee 15.6 OO [we Oe if Tsk Gy | ee = = Fe LavQn 7 ah ee 
FADIA Comoe pe Ome am Backs 4064 | 11.4 | 13.6 | 24.8 | 10.9 6279 383 telG2 Obie oe: 8.7 9.7 
iKarbankal 224 8s eee rare 440) |e: see 22 eee eS | Ce peed yee es 1) 4. O5)/105.6t ee as ee } 11.8 
Korbankaunionic 242 eee. es 4063" | 132911255 23.2, | 1059 dos 4.3 | 20.0 ; 13.2} 10.5 |} 12.2 
iulbanka INo. 74 2 2 SNe |e. ee ee CE ESE CL Oe ee Ng pe eames! estes 
Mind urmpy sesame eee oe 0296". || 2 eee [ee TES GIS | ee een Rei Bes 19/92 = eee ee ae 
VIO MAG eke eee See cere Sree 3320 |... 3s ee ee el 6.89] P47 ao0 NS bees OSG 1. 12-5ee 
INodake (harbankaaiNor98)ee al Oo) Oli): ae | eee eee pa TS Pare iat: Caer fa tens Oe ps Se (aes 12.0 
Peliss: 
IP GLISSe eee eta ne Sy. ney oneness HOSS: "| _2 55 | aes ee eee een | oe [F35.. ad Gh oajaee | eee 10 By. 
