SYNOPSIS OF THE VARIETIES. 37 



RESISTANCE TO DISEASE. 



In sections where nematodes and cowpea wilt occur most soy- 

 bean varieties are seriously affected by both these diseases. A few 

 varieties, however, exhibit considerable resistance to these diseases, 

 and there is good ground to believe that practically immune strains 

 can be developed. 



NONFILLING OF PODS. 



In Louisiana and the southern half of Alabama, Mississippi, and 

 Georgia late varieties of soy beans, especially the Mammoth, fre- 

 quently fail to develop seeds, while earlier sorts are not thus affected. 

 The cause for this has not been determined. At Biloxi, Miss., selec- 

 tions of No. 20797 fill their pods perfectly, so that there is little 

 doubt that late varieties adapted to this section can be secured or 



developed. 



SYNOPSIS OF THE GROUPS. 



Plants bushy, the branches without tendency to twine, the terminals rarely elon- 

 gated : 

 Pods medium to large, crowded or scattered; stems coarse to medium. Group I 

 Pods small, stem rather slender — 



Internodes short, the pods crowded; medium late II 



Internodes long, the pods scattered; very late; foliage dark green . Ill 



Plants more or less twining, especially the long, slender terminals: 



Plants erect or suberect, slender, the internodes long; pods medium to 



small IV 



Plants procumbent, rather coarse; pods small; very late V 



These groups merge into each other more or less, but in a general 

 way represent fairly distinct types. The type of branching is the 

 same in all, the differences being due to the relative development of 

 the main stem and the lateral branches. 



SYNOPSIS OF THE VARIETIES. 

 GROUP I. 190 VARIETIES. 



Group I contains far more than half of the varieties of soy beans, 

 including all the best known ones, such as Mammoth, Hollybrook, 

 Guelph, and Ito San. 



Seeds strnw-yelloiv; germ yellow— 71 varieties.— 'Nos. 14953, 14953 A, 14953 B, 16790 

 D, 17257 E, 17262 B, 17268, 17268 A, 17269, 17269 D, 17270, 17271, 17273, 17275, 

 17275 L, 17276, 17277, 17277 A, 17278, 17280, 17862 G, 18619, 19184 A, 19184 G, 19981, 

 19981 A, 19984, 20011 A, 20406, 20406 C, 20407 B, 20892, 20892 A, 20893 A, 21079 H, 

 21080 K, 21754, 21825, 22312, 22318, 22318 A, 22335, 22379, 22406, 22498, 22503, 22504 

 A, 22505, 22506, 22714, 22876, 22879, 22880, 22880 A, 22880 C, 22901, 22921 B, 22922, 

 22922 A, 23207 B, 23209, 23292, 23296, 23303, 24181, 24672, 24672 B, 24695, 24840, 

 25131, 27500. 

 197 



