MANAGEMENT OF GENERAL FARMS IN OEEGON. 
11 
The crop indexes of the three groups of clay farms were 79, 99, and 
118. The percentage that farm income was of the capital for these 
three groups of farms was 2.64, 4.93, and 5.61, respectively. It will 
be observed that the percentage for the group of 22 farms with an 
average crop index of 118 was 2.12 times as great as that for the 
group of 23 farms whose crop index averaged 79. The influence of 
crop yield on efficiency was even more pronounced on the silt loam 
farms. The crop indexes of the three groups of silt loam farms were 
76, 101, and 124, while the percentage that farm income was of capital 
for these three groups was 3.44, 6.81, and 9.25, respectively. In other 
words, the group of 51 farms with an average crop index of 124 was 
2.69 times as efficient as the group of 43 farms with an average crop 
index of 76. 
The difference in the percentage farm income is of capital in the 
different groups of farms in Table V is the result of the combined 
influence of crop yield and income per animal unit; for, as the table 
shows, those farmers whose yields were highest also obtained, on the 
average, the highest income per animal unit. Tabulations not given 
here show that of the difference between the farm incomes of the 
lowest and those of the highest groups, from $250 to S3 00 is due to 
difference in income per animal unit. Most of the remainder is due 
to difference in yield. 
PERCENTAGE OF FIELD-CROP AREA IN LEGUMES. 
The field-crop area is that portion of the farm upon which crops 
were grown during 1912, the year the farm survey was made. During 
that year a very limited area was devoted to leguminous crops on the 
clay farms. For that reason Tables VI, VII, and VIII deal only 
with the 144 silt-loam farms. In Table VI the farms are divided 
according to the percentage of the field-crop area in legumes — i. e., in 
clover, alfalfa, peas, and beans. 
Table VI. — Relation of percentage of field-crop area in legumes to percentage farm income 
is of capital on 144 silt loam farms in Marion and Polk Counties, Oreg. (1912). 
Item. 
Per cent of field crop area in legumes- 
None. Under 18. 18 to 33. Over 33 
Number of farms 
Average percentage of field-crop area inJegumes. 
Average improved land (acres) 
Average capital 
Average farm income 
Percentage farm income is of capital 
35 
112 
$19,821 
$770 
37 
12.0 
133 
$23, 368 
$1,425 
6.10 
37 
26.0 
139 
$23, 272 
$1,834 
7.88 
35 
44.8 
121 
$19, 181 
$1,648 
8.60 
Of the 144 farms in Table VI, 35 grew no legumes. There were 
37 farms with an average of 12 per cent, 31 with an average of 26 per 
cent, and 35 with an average of 44.8 per cent of the field-crop area in 
legumes. The percentage farm income is of capital for these groups 
of farms was 3:89, 6.10, 7.88, and 8.60, respectively. It will be seen 
