WINTER WHEAT IN THE GREAT PLAINS AREA. Zi: 
subsoiling have not proved profitable, green manuring showing the 
greatest loss. As an average for the two years for which results 
are available from disked corn ground, this method has given much 
higher net returns than any other method. 
AKRON FIELD STATION. 
The soil of the field station at Akron, Colo., is of a clay-loam type 
locally known as ‘‘tight land.’’ It is characterized in the native 
vegetation by a growth of short grass. As it carries in each unit 
section a considerable supply of water and as it offers no physical 
obstruction to the development of roots, it is possible to store in it 
a large quantity of water available to a crop. It is a soil on which 
maximum results would be expected from methods of tillage calcu- 
lated to store water. (Table XII.) 
TasBLe XII.— Yields and cost of production of winter wheat by different methods at the 
Akron Field Station, 1910 to 1916, inclusive. 
Num- Yield per acre (bushels). 
Treatment and previouscrop.} plats 
avel- | i919 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | “Ver 
aged. age 
Early fall plowed: Winter 
AOE) Fae AO Ae SASS Sa TS 1 10.3 6.8 26.7 2.0 24.8 8 4.2 ey 
Late fall plowed: Winter 
WHECE Tee Ren aey a Pei On ie gee 1 11.4 U7 25.8 3.3 24.5 22.0 4.2 1353 
Listed: Winter wheat....... 1 8.8 6.0 30.0 7.2 21.3 18.2 Toth 14.2 
Subsoiled: Winter wheat....! 1 6.9 3.3 21.2 3.2 24.5 21.0 3.8 12.0 
Diskeds Cormt..ceoss secs: 3 Wot! 3.1 36.3 11.4 27.7 26. 2 15.3 19.7 
——_—=— a | | ee | | a ee || | ae ee SS 
Green manured: | 
Waithiryertsascn- eee | 4 15.7 3.8 36. 8 8.4 26.4 25.7 19.2 19.4 
WV Uh peasmecee sess nes | 4 12.7 2.4 33. 2 4.2 23.1 13.8 9.7 14.2 
Total or average....... 8 14.2 3.1 35.0 6.3 24.7 19.7 14.5 16.8 
Sa aa ee a ee eee SS Le ——————— 
Summertilledeesss sass see 2 18.0 10.5 40.9 12.7 27.0 27.4 24.9 23.1 
Average of-all17 plats. .--..-|..---2-. 14.1 4.3 33.8 7.4 25.3 22.0 13.6 17.2 
SUMMARY OF YIELDS AND DIGEST OF Cost. 
Tillage treatment. Previous crop. 
Yields, values, etc. (average Early | Late Green | Sum: | Winter 
per acre). fall fall | Listed aoe Disked} ma- | mer | wheat | Corn 
plowed] plowed|(1plat). (1 plat) (8plats).| nured | tilled (4 |(8plats). 
(1plat).|(1 plat). peat? 8plats).|2plats).| plats). 
Yields of grain: 
TOLOM See Sete bushels 10.3 11.4 8.8 6.9 Vid 14.2 18.0 9.4 Wea 
LOM beer eied ro aes Bis do.. 6.8 Wa? 6.0 3.3 3.1 3.1 10.5 4.5 8.1 
1h) Pa eee do.. 26.7 25.8 30.0 21.2 36.3 35.0 40.9 25.9 36.3 
LODS seers eR Scere do.. 2.0 She. 7.2 3.2 11.4 6.3 12.7 3.9 11.4 
NOMA eRe Seven do 24.8 24.5 21.3 24.5 PALO 24.7 27.0 23.8 27.7 
ODS eee Hh ssat so! do 20.8 22.0 18.2 21.0 26. 2 19.7 27.4 20.5 26.2 
WOUG Ssaciesic Gastccins do 4.2 4.2 leks 3.8 15:3 14.5 24.9 5.0 15.3 
IAVOCTALOS tae eie mes cai as 1327 13.3 14.2 12.0 19.7 16.8 23.1 13.3 19.7 
Crop value, cost, ete.: 
Values sey, 2s Sasso eoa- $9.59 | $9.31 $9.94 | $8.40 | $13.79 | $11.76 | $16.17 |.....2..).-.2...- 
COSUEAt et oo 26 oo seule ening 6. 32 5. 65 5. 03 7.03 420) |Be Loe 9 Ob hee LO 4a | eeeae ere) ntememte 
IPFONTOMIOSS=- 224 a--6- 3. 27 3. 66 4.91 toi 9.54 | —2. 20 DOO |lseetsccinvaliomaisielsiers 
