28 
BULLETIN 222, U. S. DEPARTMENT OF AGRICULTURE. 
The only method that has consistently shown increases sufficient to 
attract attention is summer tillage. Under this method barley has 
given an average yield for six years of 12.6 bushels per acre, with a 
maximum yield in any one year of 19.6 bushels per acre. On the 
whole, barley does not seem to offer more promise for this section 
than any other of the spring-sown small grains. 
A loss by all methods under trial has attended the growth of the 
crop. These losses range from SI. 94 on disked corn ground to $6.23 
on summer-tilled land. 
Table XVIII. — Yields and cost of production of barley by different methods at the 
Amarillo 1 Field Station for 1908, 1909, and 1911 to 1914, inclusive. 
Number 
of plats 
averaged. 
Yield per acre (bushels). 
Treatment and previous crop. 
1909 
1910 
1911 
1912 
1913 
1914 
Average. 
Fall plowed: Barlev 
1 
13.2 
5.8 
11.7 
1.7 

16.7 
8.2 
Spring plowed: 
1 
1 
7.9 
8.1 


12.2 
12.3 
2.7 
1.1 


21.0 
2.7 
7.3 
Oats." 
4.0 
Average 
2 
8.0 

12.3 
1.9 

11.9 
5.7 
Listed : Barley 
1 
1 
1 
1 
10.8 
11.9 
7.5 
15.2 



17.5 
11.4 
10.3 
11.8 
15.0 
1.5 
1.5 
1.7 
4.2 



4.2 
13.1 
17.1 
18.8 
19.6 
6.1 
Subsoiled: Barley 
6.8 
6.6 
Summer tilled 
12.6 
Average of all 7 plats 
10.7 
3.3 
12.1 
2.1 
.6 
15.6 
7.4 
Summary of Yields and Digest of Cost. 
Tillage treatment. 
Previous crop. 
Yields, values, etc. (average per 
acre). 
Fall- 
plowed 
(1 
plat). 
Spring- 
plowed 
(2 
plats). 
Disked 
(1 
plat). 
Listed 
(1 
plat). 
Sub- 
soiled 
(1 
plat). 
Sum- 
mer- 
tilled 
(1 
plat). 
Small . 
grain 
(5 
plats). 
Corn 
(1 
plat;. 
Yields of grain: 
1908 bushels. . 
1909 do.... 
1911 do.... 
1912 do.... 
1913 do.... 
1914 do.... 
13.2 
5.8 
11.7 
1.7 

16.7 
8.0 

12.3 
1.9 

11.9 
7.5 

11.8 
1.7 

18.8 
10.8 

11.4 
1.5 

13.1 
11.9 

10.3 
1.5 

17.1 
15.2 
17.5 
15.0 
4.2 
4.2 
19.6 
10.4 
1.2 
11.6 
1.7 

14.1 
7.5 

11.8 
1.7 

18.8 
8.2 
5.7 
6.6 
6.1 
6.8 
12.6 
6.5 
6.6 
Crop value, cost of production, etc.. 
S3. 36 
6.46 
S2.34 
5.99 
$2.71 
4.65 
$2.50 
5.45 
$2.79 
7.07 
$5.17 
11.40 
Cost 
—3.10 
-3.65 
-1.94 
-2.95 
-4.28 
-6.23 
i The location of the station was changed in 1910, and the records for that year were not used. 
GENERAL DISCUSSION OF RESULTS. 
In the preceding pages the data have been presented and discussed 
for each station separately. In the following pages some of the more 
important phases are discussed from a more general standpoint. 
