WINTER WHEAT IN THE GREAT PLAINS AREA, 
The results of eight years are available from Amarillo. 
Oi 
The 
year 1910 was lost by reason of an enforced change in the location of 
the station. 
four they were very poor. 
In four of the eight years the yields were fair and in 
(Table XVI.) 
TABLE 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- ; Aver- 
aged. 1908 | 1909 | 19101} 1911 | 1912 } 1913 | 1914 | 1915 | 1916 age. 
Early fal) plowed: Winter 
WANG Tee eee: tet eR rs ee 1 | 14.3 Ove eae se 3.5 Cay 1.3 | 23.0 | 24.4 3.6 9.7 
Late “ail plowed: Winter 
WES Gest Rey. a TR 2 ar OLA aS eae oa 525 0 21.8 | 18.3 5.8 8.4 
Listed: Winter wheat......- Ihe TEARS AEC cane eee oe Qe coed |e 12h VA 2222 Ges 8.5 
Subsoiled: Winter wheat. .-.-. G35 |e Ol ee SPI Blea) 1.3 | 19.3] 19.7] 4.5 8.2 
IDiskedsaCornees =o ee see. oe Pr Weal ls 7 OSE eee ene 1.2 | 10.4 PW Asase|) WEG) 3.6 Coal 
Green manured: ; 
Wintihiryen eee... sd tee Selo Ob Ole eaten = 2.1) 10.8} 2.4] 16.4] 14.9] 4.8 8.3 
AWalib yD CaSi2e eis te eros eip a a yh leas oh Ope eyes se 252) LOK9 Qe AGIOM al lars 3.9 7.6 
Total or average......-. | OSS) de dso alloca cies 2.1) 10.9} 2.5 | 16.7] 13.4) 4.3 8.0 
Summer tilled..........-..-.- | Oy Tao Oe) | Je 4.8|12.8| 4.3 | 22.4] 15.7| 5.3 10.6 
Average of all 14 plats. .....--!.....--- 14.2 BC eee 2.5 | 9.5 | 2.3 | 18.3 | 15.7) 4.6 8.4 
SUMMARY OF YIELDS AND 
Tillage treatment. 
DIGEST OF COST. 
Previous crop. 
Yields, values, etc. (average| Early | Late Green es 
per acre), fall fall | Listed eee Disked| ma- ae ae Corn 
a Wes Li @ plats) RS villed(2 |) bia 
plat). | plat). plat). plats). plats). | plats). 
ay, dels ot grain: 
oe 3 eee bushels 14.3 ae Uf 15.3 16.5 We 7 18: 8 16.9 ie Us ily 
1908 Se ie cepa do. 0 0 0 2.9 0 
IQLOBBB Ree See's: (Myre Fe mek nel Hea alee A | (Sp | Uaston copa pal Lan Se | [eel ala meg ge Ry 
LAG aes ae ee eee do. 3.9 Goll 2.2 2 1.2 2p i 4.8 2.5 12 
LOU eae ee do. Ue? 5.5 5.7 63 or 10.9 aS a 10.4 
[DISSES ER Nee do. 13 0 1.2 1.3 2. 2.5 .3 be 2.0 
OTA ee Ss cet ae. do. 23.0 21.8 14.2 19.3 16.3 16.7 22.4 19.6 16.3 
LODE eae ens ee. do. 24.4 18.3 22.2 19.7 11.5 13.4 15.7 21.2 11.5 
LONG Meee icone do. 3.6 5.8 6.3 4.5 3.6 4.3 3.3 5.2 3.6 
PASV OF APOE eRe oer 9.7 8.4 8.5 8.2 Ceal 8.0 10.6 8.7 7.1 
Crop value, cost, ete.: % 
Walieuct te sae. steed & PONT Me OOS |p DOCG 4) | Pan OM ol POL GO! [veg b2ule seeps ce| pe eeye mrs 
COS os tl ee ee 6.32 5.65 5.03 7.03 4.25 DS 960 OSG 4a eee | See 
ETO OMLOSSs ae eeeee ee -47 23 92 | —1.29 Moh |i — Se! lt —o. 2a | ee sete asd reer 
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 
