Pee ag oes nN aT RE SEES ER aid ET 28 Ses, 
NORTHERN GREAT PLAINS FIELD STATION, 1913—1922 5A 
wheat, has produced a yield equal to the fall-plowed plat, but 
subsoiling requires more labor and expense than fall plowing. The 
listed plat has produced yields about the same as those given fall 
plowing and subsoiling. The method, however, is not as expensive 
as subsoiling. 
TABLE 16.—Yields of spring wheat in two fields at the Northern Great Plains Field 
Station following different cultural treatments and various crops for the 8-year 
period, 1915-1922, inclusive 
Num- . . Yields per acre (bushels) 
| ber Aas ib eis Wi Re ge eo : 2 
Field, treatment, and previous crop ants | 
aver-| 1915 | 1916 | 1917 | 1918 | 1919 | 1920 1921 | 1922 AVE 
aged | | eS 
| 
| | Aa ss ie 
MAIN FIELD | | | 
Disked: | 
(CLOT See Bs ee ae a oe ne ee 16 | 34.5 | 18.4 | 14.3 | 14.8) 12.1 TB || Orissa) PAYG ala 7 
OvalOeSe at ato ee FE 8 ee ee TE S957 | 22 ome leo 12055 211498) 655 TSE 2 70 19.3 
Spring plowed: 
ORT amen ve ent Bei 3p (835-2) | QOS et SYOF |= 20:5 | Me Sile eG deen9s| 22°69} s1Gs8 
( OVRW SS od) Rte ae a alate ee 3) | 20.2 || 2259) 1 Aa | 17.9) 1106 BIE | s3sa3 (eel 16. 2 
SDEMo MWe DG sees en tee tae Reena | Te ei0b a) a 2 |) ia el RR Te | ey 1G | AP SHiPOS on folses 
Ri Seb PACT Vu Sens Vette [Pera 28.8)) TOR Sm eTORR: (IS. Pelee 24 | GUD On. 2052k 1 18.1 
Fall plowed: | | | 
(CSch Ae Re a 2 a eae pene Sulisd. Os! 228m etOsdal lo.3 | 13. Vale s20N) 0 1940.1 14.8 
OFS etna ee ees SOE Ee ae epee 7 | 33.5 | 23.5 | 13.8 | 10.4 Leahy abo) “OF eg) 14.2 
SMM PWC ale = aa = ee ae ee eee 1 | 32.1 | 18.5 | 14.8 | 15.3 Hy 3) PISO) Os ae 12.4 
Summer fallowed: | | | | 
TT ANT Cee se ee a | 10} 44.1 | 22.7 | 16.0) 23.0} 138.1 | 8.1) 3.4 | 24.0 19.3 
NVEATUTCO eye ee ee ee er er ge | 2 | 41.6 | 29.7 | 24.1 | 26.0 | 14.3 | 14.4| 43 | 30.4) 23.1 
Green manured: | | | 
Wits teriny cess 4 = seth Stree eek tte 1 | 29.6 | 24.3 | 21.8 | 18.8 | 10.0 | 10.8 | 1.0) 17.7; 16.8 
ens wneee es eh ye t= | 6 |038) 1 | S7esareomey, [025.5 | 1180) 014/01 10:7) 16.9 
VEC ICO MET ee ets ee rae ee ES LEHR 2-40 P2Se elec Maal oa dled le terol asro 15.4 
Subsoiled: | | 
Spring awheatn< saye Pa ee ieiesl= 7 | ASHSmetonSalenre eves Or. te Ola.) 15:2s= 1280 
Listed: | | 
SMa Baw ea tip as eee ae ee | 1) 3256) | LSiey es) |) Aas 7, Beh ves temnt| 0) 17.2 13.0 
| j | ine —— 
Average of all 53 plats__-_____-___- ESOeS 2 vs | 30.7 | 21.5 | 15.2 | 16.9 | 11.5] 6.3 | GZ Real 16.3 
SOUTH FIELD | | 
| | | 
Spring plowed: | | | 
SpLrincawheatassees =< > cps 2 he at | 2: 28.2 | 15.4 8.9 0 (aA 0 19.6 9.9 
Fall plowed: | | 
SDrin Gaw Meat ae se ae ee LE PAN Ua a ees || “foal 0 OFSre tO al eOe 1elOR9S 8.9 
Pie Sos ee a Se eee eee eee 2 No2at | L9R9 8.5 OF | 856 Teale} 0) = 4) te 11.0 
Summertallowed. =. at et? AVANT (al Ika By 4h IBS 7 652)4 1453 | = 8.4 | Oe) e642 14.8 
Subsoiled: | | | 
Sprmeawhentaeee sae S tees Tee ts | 2 | 25.2 | 15.8 Ee ad WU 0 20. 4 9.2 
Listed: 
SPE oWwiea tera) cee we asa SE 2 | 27.3 | 1728 6.9 | 0 730 |}. ea 0 19.1 10. 2 
Average oallelasplats= = 2 feat 3258 1Gevalpe Osama Sile OsOni2 oe0rie 10 I |) TR 
} | | 
The yields of wheat in the south field are lower than in the main 
field. The difference is partly due to the heavier soil in the south 
field, and partly to greater run-off from it. Plats in the main field 
that are strictly comparable with those in the south field show an 
average yield of 4.3 bushels more per acre. The average yield from 
fallow in the south field is 4.9 bushels per acre less than from similar 
plats in the main field. 
Judged by the results of the experiments to date, the most profit- 
able method of raising spring wheat in this section is to use disked 
corn ground. This would be in a system of livestock and grain farm- 
ing. However, in the case of wheat growing alone, if the farmer 
does not want to grow corn, or if corn will not grow successfully, 
summer fallow and spring wheat would be a better method to follow. 
