WINTER WHEAT IN THE GREAT PLAINS ARBEA. i. 
The results of eight years are available from Amarillo. The 
year 1910 was lost by reason of an enforced change in the location of 
the station. In four of the eight years the yields were fair and in 
four they were very poor. (Table XVI.) 
Taste XVI.— Yield and cost of production of winter wheat by different methods at the 
Amarillo Field Station, 1908 to 1916, inclusive. 
Num- Yield per acre (bushels). 
ber of 
Treatment and previous crop. | plats 
aver- 9 Aver- 
aged. 1908 | 1909 | 19101} 1911 | 1912 | 1913 | 1914 | 1915 | 1916 age. 
Early fall plowed: Winter 
\ViiOGG hs oA ae Ae ee ee DeLay i OL ls eee 3.5 7.2} 1.3 | 23.0 | 24.4] 3.6 9.7 
Late fall plowed: Winter 
WHIGE too Ae Ga ase eee POL 2A TENTION {05S See Solel 5208) 0 21.8] 18.3] 5.8 8.4 
Listed: Winter wheat....... dol etossicie 0 Qe2 od || LZ) 42a 22-2) 6. 8.5 
Subsoiled: Winter wheat. -.--. 1} 16.5] 0 W242 323} Le3) ||. 19.38) 192751) 14.5 8.2 
Disked-iCorn.- 3... 2-.--225- Qables 0.. || 52a 1.2 | 10.4] 2.0) 16.3} 11.5) 3.6 Well 
Green manured: 
Watninyes S2fi8) $25 S22. | 3) |) ISOM Ot Weeeoc. 2.1) 10.8} 2.4] 16.4] 14.9] 4.8 8.3 
WVaGa peas 22. 0-2 2-2 5s e Br) IAT Ie Oia Bess 5 252) | 10'9)}| 2.7 | 16.9 | 11.8) 3.9 7.6 
Total or average.....-.. (eG BRC! Sesec4 Sees o- Pe WAO Oitie2e0) || Load lond |e4n3 8.0 
Summer tilled.-.....-..-----.- 2 IGE) |) PB)" = 4.8 | IPCI Ch8) |) PPR TESTA B58} 10.6 
y 
Average of all 14 plats. ....--.'-....--- 14.2 4. |. 28 2.5] 9.5 | 2.3] 18.3 | 15.7| 4.6 8.4 
SUMMARY OF YIELDS AND DIGEST OF Cost. 
Tillage treatment. Previous crop. 
Yields, values, etc. (average| Early | Late Green r 
” per acre). fall fall | Listed ste Disked| ma- Sur Mer Corn 
plowed plowed c ) ieee Shia tilled (2 (4 sea) 
a 1 plat plats 6 plats). 
plat). | plat). si). plats). plats). | plats). 
ay; pels gi grain: 
oe ee bushels..| 14.3 IPB 15.3 16.5 11.7 13.8 16.9 14.7 7; 
1900 ae eee Goss |pan0 0 0 0 0 0 2.9 0 0 
UO 02 eee (ClO) ea ssceas| SCeneeos GAGEeeee cc coco boceebed meaceo se aEecason lGobacHra SSapanas 
OTROS arate cia do. 3.5 3.1 2.2 1.2 1.2 il 4.8 2.5 a7 
1) es ee ee do Ue? 5.5 5.7 3.3 10.4 10.9 12.8 5.4 10.4 
TU ho erent rere do 1.3 0 1.2 1.3 2.0 2.5 4.3 1.0 2.0 
NOVARA yee oe 22" do 23.0 | 21.8 14.2 19.3 16.3 16.7 22.4 19.6 16.3 
HO Es Se. os ees do 24.4 | 18.3 22.2 19.7 11.5 13.4 15.7 21.2 11.5 
HGIGS Essences oes: do. 3.6 5.8 6.8 4.5 3.6 4.3 5.3 5.2 3.6 
PAV OUAGCE Sosa aasehes 9.7 8.4 8.5 8.2 7.1 8.0 10.6 8.7 Coit 
Crop wale, cost, ete.: 
ations TA Sy) oases 22 $6.79 | $5.88 | $5.95 | $5.74] $4.97] $5.60] $7.42 |_....-..|.-...-.- 
COSTE anne 6.32 5.65 5. 0; 7.03 25 13.96 WOPG45| 0 Sa eee ee 
Prontior loss.2 = - - =. - -47 -23 -92 | —1.29 si(2) || U—8 30), —oeeas|oenesee |e eee 
1 The yields for 1910 are not used, as the station was moved that year. 
2 Cowpeas were grown from 1907 to 1911; field peas since 1911. 
In 1909 winter wheat was a total failure at the Amarillo station 
from all methods except summer tillage, which produced 2.9 bushels 
per acre. 
No method has shown any marked superiority over others in pro- 
ducing yields. The highest average yield, 10.6 bushels per acre by 
