26 BULLETIN 219, IT. S. DEPARTMENT OF AGRICULTURE. 
AMARILLO FIELD STATION. 
Table XVII presents the results in the growth of corn during 
seven years by different methods at Amarillo, Tex. No data are 
presented for 1910, as the station was moved and only one method 
was on trial that year. Fodder was produced each year by all 
methods, but in only one year was there a creditable production of 
grain. 
Table XVII.— Yields and cost of production of com by different methods at the Amarillo 
Field Station, 1907 to 1914, inclusive, except 1910. 
Yields, values, etc. (average 
per acre). 
Yields: 
1907. 
190S. 
1909. 
1911. 
1912. 
1913. 
1914. 
Average 
Value 
Total value. 
Cost 
Profit or loss. 
Fall plowed. 
After corn 
(1 plat). 
Bu. Lbs 
1.4 3,270 
22.9 4,580 
2.7 1,310 
9.2 2,075 
.71 
380 
3.6 4,140 
5.82.491 
After 
small 
grain 
(11 plats), 
Bu. 
2.3 
19.8 

8.9 
1.7 

5.1 
5.4 
S2.32'$4.9S 
S7.30 
7.49 
.19 
Lbs. 
2,997 
3,107 
1,596 
2,145 
1,848 
773 
3,641 
Spring plowed. 
After corn 
(1 plat) 
Bu. Lbs. 
3. 1 3, 280 
20.3 3,300 
2,301 5.1 
*2. 16 §4. 60 82. 04 
560 
1,945 
2,160 
700 
1,500 
1,921 
S6.76 
7.49 
- .73 
83 M 
85. ss 
7.11 
-1.23 
After 
small 
grain 
(3 plats). 
Bu. Lbs 
2. 1 3,010 
14.7 2,863 
1,383 
9.5 1,960 
1.11,829 
3S3 
2. 8 2, 733 
4.3 2,023 
81.72 84.05 
S5.77 
7.11 
-1.34 
Subsoiled, 
after corn 
(1 plat). 
Bu. Lbs. 
1.13,490 
25.7 3,810 
1.7| 990 
7.11,720 
1.0,2,080 
430 
5.1 1,850 
6.0 2,481 
Listed, 
after corn 
(2 plats). 
Bu. Lbs 
2.2 2,935 
24.7 2,390 
5.4 1,043 
7.81,998 
1.7 2,015 
I 225 
7.0 2,870 
Summer 
tilled 
(1 plat). 
Bu. 
5.7 
27.6 
6.4 
9.3 
3.3 

8.0 
Lbs. 
3,710 
3,700 
1,890 
2,050 
2,840 
1, 750 
5,320 
82. 40 84. 96 
82. SO S3. 85 S3. 44 86. 07 
S7.36 
8.18 
7.01,9251 8.6 3,037 
$6. 65 
5.98 
S9.51 
12.36 
■2.85 
The yields by different methods show comparatively small differ- 
ences. Summer tillage shows a small increase in yield of both grain 
and stover over all other methods of preparations. Fall plowing was 
a somewhat better preparation than either spring plowing or listing. 
Subsoiling failed to increase yields over fall plowing similar land 
without subsoiling. Listing shows a small profit of 67 cents per acre. 
All other methods show losses ranging from 19 cents per acre by fall 
plowing after corn to $2.85 on summer-tilled land. 
GENERAL DISCUSSION OF RESULTS. 
In the foregoing pages the results of growing corn by different 
methods of land preparation have been discussed in more or less 
detail for each individual station. It yet remains to take a broader 
view of the problem, and the relative merits of different methods will 
be considered for the Great Plains area as a whole. Some compari- 
sons of station with station as representatives of different sections of 
country whose results are indicative of the comparative value of corn 
to such sections will also be made. 
