WINTER WHEAT IN THE GREAT PLAINS AREA. 29 
GENERAL DISCUSSION OF RESULTS. 
In the preceding pages data have been presented and briefly dis- 
cussed separately for each station without reference to results at 
other stations. In the following pages the data are considered from 
a more general standpoint. Table XVIII will assist in this study. 
TaBLE XVIII.—Comparison of the average yields and profit or loss on the production 
of winter wheat by different methods at thirteen stations in the Great Plains area. 
Method of tillage. 
Num- 
ber of 
Statement of data. years Early Late Green 
ayy | stall fal | Listed. | SUD; | Disked.| _ma- ere 
aged. |plowed.alplowed.a Eee nured oon 
Yields per acre (bushels): 
UGH BAS eee ee 7 18. 2 18. 0 2 18.3 620.2 c24.4 25.7 
RUIN Ge yies oe eee ees 4 b17.2 618.9 b18.5 b19.0 25.8 30.6 39.4 
Belle Fourche..........-- 8 12.4 12.7 14.3 DEE ER gO SERS oe 235i 
AT OMEOTO Sek ee as ek ee 3 19.7 19. 0 19.7 22.6 Das?) 21.0 Dh. & 
IAT CITC cen reo ene hee 3 10.7 10.0 8.9 8.9 213.6 213.8 12.6 
SCOuuSHLU eee. 5 9.1 5.4 €3.8 213.7 15.4 SYS 20. 6 
INoroune Platte. 52-2). ee 5 16.7 PSPC PR Ss ORGS hs ah Sao 19.5 21e5 21.6 
PATON eae be ges aos 7 ile 7/ 13.3 14.2 12.0 19. 7 16.8 PBS IL 
Ey Since cee nea seeee ee 9 17.6 11.0 19.2 19.6 15. 4 17.0 Ppa i 
Garden City. 5-222 32 —- 7 2.3 2.5 3.4 3.8 3.3 5. 2 5.9 
WW athantercc es meee ee 6 yal 2.9 BP LY ea x) bO 335) 
pA aei Orga ne ek ee 8 9.7 8.4 8.5 8.2 7.1 8.0 10.6 
A MoConea\eri tle ee eee 3 Pd Pl PONS al Wis See Voom SI Biehl ieee bo Res SD akg li Soult 
INV CT AR Ghee ace ene eee oer eee 11.8 10.8 11.8 13.8 14.7 15.8 18.3 
Average for the 9 sta- 
tions at which all 
methods are used.....]......... 13.1 11.8 12.6 14.0 15.9 16.9 20.7 
Profit or loss (—) per acre: 
DUC ASIEe == eee if $6. 42 $6. 95 $7.01 $5.78 | 5689.89 | ¢$3.12 $7.35 
hum tleveke tes oe eee 4 65.72 67.58 b7, 92 b 6. 27 13. 81 7.46 16. 94. 
Belle Fourche..........-- 8 2.36 3. 24 4.98 MCAT Ufc) (este ee far Na ne iy 53} 
AVGIMOLOsS osc bess, - 3 7.47 7. 65 &. 76 8.79 11. 29 74 Uepal 
IAT CHET ey ey oes ere hess at 3 iL vailyy 1s ats) 1. 20 — .80 d5,27 \d— 4.30 —J.82 
SCOntsbluil- 22522-55252: 5 05 —1.87 | e—2.3 22.56 6.53 | — 3.25 3.78 
NGI IEG ee 5. 5 aa gee 5 5.37 BR 1D hal eect, vee ane ae 9. 40 1. 09 4,48 
I NUS HOL SS Sel eee ae ee 7 BY Pi 3. 66 4.91 od 9.54 | — 2.20 O00 
ETA Sate eincrts ah otis os 9 6. 00 2.05 8.41 6. 69 6.53 | — 2.06 5. 25 
Gardeny @ityion eet e 7 —4.71 —3.90 | —2.65 —4.37 | —1.94 | —10.32 —6. 51 
ID Paull aves el ere Bes So ND a ah 6 —4,.15 —3. 62 | J—3.28 |.....-.-- b—4,25 |b—13.96 —8.19 
AMATO ee ee eee 8 aA 52} -92 —1.29 .72 | — 8.36 —3,. 22 
MICO Canls sss ese 3 —4, 43 =A (A te Peers Sues |e ome aco Fe he —8. 47 
aAt Huntley and Judith Basin there is no difference in time of plowing. The plats at these stations 
designated as plowed “‘early’”’ were plowed deep; those designated as “‘late’’ were plowed shallow. 
b Three years. ce Six years. d Two years. e One year. f Four years. 
In this table the average yields at the several stations are grouped 
under different methods of preparation. The figures here given are 
taken from the tables showing details for each station. 
Data in regard to yields and cost of production are also assembled 
in such a way as to show the profit or loss in dollars and cents per 
acre for the average crop by each method for which it has been com- 
puted at each station. 
Table XVIII shows that at five of the stations (Judith Basin, 
Huntley, Belle Fourche, Ardmore, and North Platte) winter wheat 
has been grown at a profit by all the methods under trial. At two 
(Akron and Hays) all methods except green manuring have been 
