WINTER WHEAT IN THE GREAT PLAINS AREA, 21 
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.) 
TaBLeE 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). 
ber of 
Treatment and previous crop.| plats i 
aver- ver- 
aged. 1910 1911 1912 1913 1914 1915 1916 age. 
Early fall plowed: Winter 
sti b= aoe senee iat eeeee 1 10.3 6.8 26.7 2.0 24.8 20.8 4.2 13.7 
Late fall plowed: Winter 
WHCA ieee ween ee ese. oct 1 11.4 1.7 25.8 3.3 24.5 22.0 4.2 13.3 
Listed: Winter wheat...-.-- 1 8.8 6.0 30.0 7.2 2153 18.2 wet. 14.2 
Subsoiled: Winter wheat...-. 1 6.9 3.3 21.2 3.2 24.5 21.0 3.8 12.0 
Diskede Come ssc 25 ss sone 3 17.7 3.1 36.3 11.4 27.7 26.2 1553 19.7 
| a SS SS SS PS SS SS ee SS SE 
Green manured: | 
Whitila nye y=) S522) 22d. 4 15.7 3.8 36.8 8.4 26.4 25.7 19.2 19.4 
Wathypcase. -. 22. .5-5.5- 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 
————$—$«—| 
Summer tilled... .-:.....:=. 2 18.0 10.5 40.9 12.7 27.0 27.4 24.9 23.1 
Average of all 17 plats.-_...-- bo eeicieicias 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 Earl - 
y | Late Green | Sum- | Winter 
per acre). fall fall | Listed ue Disked| ma- | mer | wheat | Corn 
plowed!] plowed/|(1plat). (1plat) (8plats).| nured | tilled if 4 |(8plats). 
; ats). 
\(1plat)./(1plat). 8plats).|2plats).| plats) 
bushels. - 10.3 11.4 8.8 6.9 Ligh 7 14.2 18.0 9.4 ile 
ee dors 6.8 Nez 6.0 3.3 3.1 3.1 10.5 4.5 3.1 
= At ae Ber aaSe do.... 26.7 25.8 30.0 21.2 36.3 35.0 40.9 25.9 36.3 
IS ae ee ees do. 2.0 38 7.2 3.2 11.4 6.3 IPEY; 3.9 11.4 
Bae enass- asec do. 24.8 24.5 21.3 24.5 27.7 24.7 27.0 23.8 27.7 
Oh ee Se ae» do. 20.8 22.0 18.2 21.0 26.2 19.7 27.4 20.5 26.2 
Sena ccmsiciase do. 4.2 4.2 Texte 3.8 15.3 14.5 24.9 5.0 15.3 
BRMCTASOR Steins cinom sane 13.7 13.3 | 14.2 12.0 19.7 | 16.8 23.1 13.3 19.7 
Crop value, cost, etc.: ; 
WOVE SoS ep SSeL DD ee $9.59 | $9.31 $9.94 | $8.40 | $13.79 | $11.76 | $16.17 |........|-.------ 
OSE sae ei: costes ts oe5 6. 32 5. 65 5.03 7.03 4,25 13. 96 TORGE eee | Saoeeees 
Profit or loss....------ 3.27| 3.66| 4.91 | ine ee | Pag Bape ee | ie has 
