q 
WINTER WHEAT IN THE GREAT PLAINS AREA. 11 
The yields obtained from deep plowing, deep plowing and sub- 
soiling, and the shallow plowing of winter-wheat stubble have shown 
only very small differences. Listing has averaged approximately 1 
bushel per acre less than plowing. The highest average yield from 
any of these methods is 6.1 bushels less than after green manure and 
7.4 bushels less than from summer tillage. During the three years 
that seeding on disked corn ground has been practiced the yields 
from this method have averaged 6.3 bushels higher than any of the 
other continuous-cropping methods used. 
Tasie V.— Yields and cost of production of winter wheat by different methods at the 
Judith Basin Field Station, 1910 to 1916, inclusive. 
Num- Yield per acre (bushels). 
Treatment and previous a 
ae aver- | i919 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | Ver 
aged. age. 
Deep dal plowed: Winter 
NAO HEE t ane 6 Banoo eter ee 1 24.0 23.5 12.2 23.2 16.3 28.5 0 18.2 
Shallow fall plowed: Winter 
WihOaibe eas certas oe csi Shae 1 23.8 22.0 13.2 25.5 16.3 25.0 0 18.0 
Listed: Winter wheat..-..-... 1 217, 22.3 10.8 24.3 20.1 21.1 0 LA 2 
Subsoiled: Winter wheat -.-. 1 23.2 22.4 1255 26.2 15.5 28.3 0 18.3 
DASked? Cornet S352. 2428: 22 ZG A pin at oC Atay ren gate 22.5 38. 1 0 20.2 
Green manured: (aati o 
WALD - (ce cles sane sis x StlesseeSe- b 30.5 | 611.2} 631.3 | ¢ 23.6 49.5 0 24.4 
Wit pease ss tateries a= 74 WReebaneclancap sos aoneoos|saeness d 23.1 50. 5 0 24.5 
Total or average....... Fy eae any 630.5] 011.2] 031.3 | ¢23.5| 49.9 0 24.4 
Summioritilleds se. -..2--- 5---5 4] £22.0|) £31.6|] 17.5] £31.8 25.5 51.5 0 PST 
Average of all 17 plats.......'.......- 22.9 25.4 12.9 27.1 21.0 42.1 0 21.6 
| 
SUMMARY OF YIELDS AND DIGEST OF Cost. 
Tillage treatment. Previous crop. 
Yields, values, etc. (average Shal- 2 
’ per acre). see tae! isted | SU>- | Disked aeie iane Wanton 5@ 
plowed el Shay (4plats).) nured | tilled (4plats). 
(1 plat).| Plowed (1 plat). (plats).|(4plats).| 4Plats).|P''S) 
(1 plat). 
melds of grain: 
stig tfc henpiorss oars bushels 24.0 23.8 PAST) 23 o a eee eee | ements | eeaO 232 Dhl eeee ae 
it pave Sista etek Sees do.. 23.9 22.0 22.0 22 Ae ee b 30.5 | # 31.6 22 Oh eee a ee 
POR ee eles a es ae do.. 12A2 13.2 10.8 1 pyr ene eee Oi PA sae ile/e is) DD yi eva eee 
1) eee eee do. 23.2 25.5 24.3 7 FAS ee tee eae b 31.3 | # 31.8 24.18: |e aes: 
d G9)) eile ae Pema ak do. 16.3 16.3 20. 1 15.5 22.5 23.5 PAV) Win 4 ofa Ak PDAS) 
lit) Ib ese eer mae do. 28.5 25.0 2h. di 28.3 38. 1 49.7 51:5 25.7 38.1 
U9LGlan sence a eos do 0 0 0 0 0 0 0 0 0 
IAViCT ACCME cm cse cles 18.2 18.0 172 18.3 20. 2 24.4 25. 7 17.9 20. 2 
Crop value, cost, etc.: . 
WMaltt@= nse eis. epn.s): $12.74 | $12.76 | $12.04 | $12.81 | $14.14 | $17.08 | $17.99 |...._... eee 2 
Costeertacen ce. cee eee se 6.32 5. 65 5.03 7.03 4.25 | 13.96 VO HOF seers ee se eee 
3 24 (0) 01 rs sale meal as a rae 6.42 6.95 7.01 5.78 9.89 3.12 He BAD o paaeae | 
a The failure of winter wheat in 1916 was due to winterkilling. 4 One plat of peas in 1914. 
b One plat, 1911 to 1913, inclusive. e Three plats in 1914. 
c Two plats of rye in 1914, f One plat, 1910 to 1914, inclusive. 
