THE SOY BEAN FOR OIL AND OTHEE PRODUCTS. 



15 



islands. Tlie high fertiUzing 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 

 fertihty 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 possibihties 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 fertiUzing value of cottonseed meal, the soy-bean meal is a 

 more ^^aluable product. Its composition with reference to fertilizing 

 constituents and a comparison with cottonseed meal are shown in 

 Table IX. 



T.-VBLE IX. — Fertilizing constituents of soy beans, soy-bean meal, and cottonseed meal. 





Source of dota. 



Constituents (per cent). 



Crop or product. 



Nitro- 

 gen. 



Am- 

 monia. 



Phos- 

 phoric 

 acid. 



Potash. 



Soy beans 



Rnrpiin of Chp.misixy 



6.51 



6.77 



7.24 



7.72 



7.90 

 8.23 



8.79 



9 .^7 



1.36 

 1.33 



1.44 



1.36 

 2.88 



1.82 



Soy-bean c-ake 



Soy-bean meal i 



Soy-bean meal » 



Cottonseed meal 



New South Wales Department of 



.'Vgriculture. 

 Elizabeth City Cotton Oil Mills, 



North Carolina. 

 . .do 



2.00 



1.85 

 1.82 





6. 79 8. 24 



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 

 rneul to stock and apply the resulting manure to the soil. Feeding 

 experiments indicate that much of the fertilizing value of feeds is 

 recovered in tlie manure. 



USES OF SOY-BEAN OIL. 



The oil extracted from the soy boiin ])elongs to the somidrying 

 class of oils; tliat is, those having proper! i(^s intermechate ])otwoen 

 drying oils, such as linseed oil, and noiidrying oils, such as olives oil. 

 This oil has a good color, liiis hnt u faint odor, and is rather pahitable. 

 in many nsspccts it niscnihlcs colloriscK^d oil, but is of a more pro- 

 nounced drying (•\\iinicU',v. \\\{]\ IIk^ ra[)i(l gr-o\vth of thci soy-bean 



