THE SOY BEAN FOR OIL AND OTHER PRODUCTS. 
15 
islands. The high fertilizing value of the cake has long been recog- 
nized by the Japanese, who import large quantities annually for use 
in the rice fields and as an alternative manure for mulberry trees. In 
Manchuria large amounts of cake are used annually in soils of low 
fertility for both field and garden crops. 
Although large quantities of soy-bean cake have been imported 
into the United States during the last few years, there is no mention 
of its use in the manufacture of commercial fertilizers. With the 
recent production in the Southern States of bean cake and oil from 
southern-grown beans, fertilizer manufacturers have become inter- 
ested in the possibilities of the meal and have purchased consider- 
able quantities for this purpose. 
Like cottonseed meal, soy-bean meal contains considerable amounts 
of phosphoric acid and potash, a large proportion of which is " avail- 
able," but it is principally valued in fertilizers as a source of nitrogen. 
If the price is determined on the same basis as that used in calculat- 
ing the fertilizing value of cottonseed meal, the soy-bean meal is a 
more valuable product. Its composition with reference to fertilizing 
constituents and a comparison with cottonseed meal are shown in 
Table IX. 
Table IX. — Fertilizing constituents of soy beans, soy-bean meal, and cottonseed meal. 
Source of data. 
Constituents (per cent). 
Crop or product. 
Nitro- Am- 
gen. monia. 
Phos- 
phoric 
acid. 
Potash. 
Soy beans 
6.51 
6.77 
7.24 
7.72 
6.79 
7.90 
8.23 
8.79 
9.37 
8.24 
1.36 
1.33 
1.44 
1.36 
2.88 
1.82 
Soy-bean cake 
New South Wales Department of 
Agriculture. 
Elizabeth City Cotton Oil Mills, 
North Carolina. 
do 
2.00 
Soy-bean meal l 
1.85 
Soy-bean meal 2 
1.82 
Cottonseed meal. . . . 
1.77 
From seed grown in 1914. 
2 From seed grown in 1915. 
While soy-bean meal, as shown in Table IX, has a high value as a 
fertilizing material, a more economical practice would be to feed the 
meal to stock and apply the resulting manure to the soil. Feeding 
experiments indicate that much of the fertilizing value of feeds is 
recovered in the manure. 
USES OF SOY-BEAN OIL. 
The oil extracted from the soy bean belongs to the semidrying 
class of oils; that is, those having properties intermediate between 
drying oils, such as linseed oil, and nondrying oils, such as olive oil. 
This oil has a good color, has but a faint odor, and is rather palatable. 
In many respects it resembles cottonseed oil, but is of a more pro- 
nounced drying character. With the rapid growth of the soy-bean 
