THE SOY BEAN FOE OIL AND OTHEK PEODUCTS. 



17 



EnTiromnent has been found to be a potent factor in the percentage 

 of oil in the same variety.^ Considerable differences occur in oil 

 content when soy beans are grown in different localities. The Haber- 

 landt variety grown in Mississippi, North Carolina, Missouri, Virginia, 

 and Ohio gave the following percentages of oil, respectively: 25.4, 

 22.8, 19.8, 18.3, and 17.5; while the Mammoth YeUow variety 

 grown in Alabama, South Carolina, Tennessee, North Carolina, and 

 Virginia gave, respectively, 21.2, 19.6, 19.5, 18.4, and 18.8. Variety 

 tests conducted in various parts of the country indicate a higher per- 

 centage of oil with the same variety for southern-grown seed. Similar 

 results have been obtained in Manchuria, the North Manchurian 

 beans showing an oil content of 15 to 17 per cent and the South Man- 

 churian beans from 18 to 20 per cent. 



The soy bean lends itself readily to improvement by breeding, and 

 experiments indicate the possibility of securing varieties of high oil 

 content by selection. Individual plant selections from a Manchu- 

 rian variety grown at Ai'lington Farm, Va., varied from 20.2 to 

 25.5 per cent in oil content. Analyses of a large number of plant 

 selections from the Mammoth Yellow variety, grown under identical 

 conditions in the same field, showed variations in oil content from 

 18.1 to 20.4 per cent. It is apparent that there is considerable 

 variation in oil content of the same variety, and an opportunity is 

 offered for developing strains of high oil content. (Table X.) 



Table X. — Analyses for protein and oil of important varieties of soy beans grown at 

 Arlington Farm, Va., Newark, Del., and Agricultural College, Miss. 





Fat. 



Protein. 



Variety. 



Virgiiiia.2 



Delaware. 3 



Missis- 

 sippi.' 



Virginia.2 



Delaware.3 



Missis- 

 sippi.4 



Mammoth 



Per cent. 

 18.6 

 10.8 

 19.2 

 18.3 

 19.3 

 10.6 

 17.6 

 18.4 

 19.1 

 19.5 

 17.8 

 18.4 

 15.9 

 18.4 



Per cent. 



Per cent. 

 18.6 

 18.5 



Per cent. 

 37.6 

 40.0 

 37.2 

 38.5 

 34.1 

 40.3 

 40.9 

 35.0 

 34.5 

 30.8 

 40.8 

 35.0 

 39. 

 37.8 



Per cent. 



Per cent. 

 41.4 



Ilollybrook 



16. 8 



40.0 



39.0 



Manchu 





Haberlandt 



18.7 

 17.0 

 16.9 





38.2 

 40.0 

 40.5 





Medium Yellow 







Ito San 



17.4 



39.6 



Chiquita 





Tokvo 





20.7 





38.1 



Lexui^on 



17.3 



39.1 





Guelph 



20.2 



40.3 



BlacK E vebrow 









Shanghai 





18.5 

 10.4 

 17.5 

 20.3 

 15.7 

 17.9 





41.4 



Peking 



17.2 

 18.8 



30.4 

 37.0 



40.1 



Wilson 



39.3 



Biloxi 



40.3 



Barchft 



11.8 

 17.8 





45.9 

 40.2 





41.0 



Virginia 







40.6 











> Garner, W. W., Allarfl, H. A., and Foubert, C. L. Oil content of seeds as affected by the nutrition 

 of the plant. In .Jour. Agr. Uesearoh, v. 3, no. 3, p. 227-249. 1914. 



' Analyses ma'le by .Mr. If. A. I'ipcr, Hiiroaii of Chomi.stry. 



» fJrantham, A. K. Hoy beans, nol. Agr. Kxp. .Sla. Mill. 90. 39p.,lIIu3. 1912. 



♦ Robert, J. C. I'relimlnary report on the economic value of the soy bean, p. 4, tub. 1. Miss. Agr. 

 CoU.. 1915. 



