26 SOY BEAN VAEIETIE^. 



of 5, 9, and 20 bushels to the acre have been secured at AVashington, and still better 

 yields at some other points. This variety should make a good hay and silage crop 

 where sown somewhat thickly. When thinly sown it has a tendency to become top- 

 heavy and to lodge somewhat. 



The Hollybrook variety was originated by Messrs. T. W. Wood Si Sons, of Richmond, 

 Va., as an early selection from Mammoth Yellow. The name "Hollybrook" was 

 given it by them, and is the name of the seed farm on which the variety originated. 



Numbers and sources of lots grown.— Agrost. No. 454, grown from S. P. I. No. 4912; 

 Agrost. No. 976, S. P. I. No. 6556; Agrost. No. 1169, S. P. I. No. 9407; Agrost. No. 1196, 

 S. P. I. No. 3870; Agrost. No. 1299, from Havre, France; Agrost. No. 1538, S. P. I. 

 No. 6379; Agrost. No. 2032, "Hollybrook," Arkansas Agric. Exp. Station; S. P. I. 

 No. 3870, China; S. P. I. No. 4912, "Common soy," Japan; S. P. I. No. 5764, grown 

 from S. P. I. No. 4912; S. P. I. No. 6379, grown from S. P. I. No. 3870; S. P. I. No. 

 6556, "The most common soy," China; S. P. I. No. 9407, grown from S. P. I. No. 

 4912; S. P. I. No. 12.399, grown from S. P. I. No. 9407; S. P. I. No. 17269, grown from 

 Agrost. No. 976-2; S. P. I. No. 17270, grown from Agrost. No. 1169-2; S. P. I. No. 

 17272, grown from Agrost. No. 1538-1; S. P. I. No. 17276, grown from Agrost. No. 

 1299-1 and 1299-2; S. P. I. No. 17278, grown from Agrost. No. 2032. 



MAMMOTH. 



The Mammoth is the best known and most widely cultivated variety in the Southern 

 States. It has also lieen sold to a considerable extent in the North, mostly because 

 of the splendid growth it makes, but it has never given satisfaction there because 

 of its lateness. It has been a commercial variety in this country for a great many 

 years, but its origin is not known. None of the varieties yet imported by this Depart- 

 ment has proved to be exactly the same form. The Hollybrook is the most closely 

 related, but differs in its considerably lower growth and in being a little earlier also. 

 The Mammoth is the largest variety here discussed, though not quite so tall as the 

 Riceland and Hankow. 



The main stems are from one-fourth to more than one-half inch in diameter at the 

 base, from 24 or 30 to fully 48 inches in height, well branched from quite near the 

 base, with long, ascending branches, the lower ones from U to 2 feet long, the leaves 

 very large, usually rather more pointed than in the other large-leaved varieties, 

 medium to dark in color; pods 1 to 1^ inches long, three-eighths to seven-sixteenths 

 inch wide, 2 or often 3 seeded, scattered over the stem and long branches; the seeds 

 are medium in size, 6 to 6^ mm. wide, 6 to 7| or 8 mm. long, spherical or broadly 

 oblong in outline, somewhat flattened, bright lemon-yellow, shining, becoming paler 

 and duller with age; hilum usually pale Ijrown. 



The time required to reach maturity varies from one hundred and ten to one hundred 

 and forty days, the average being one hundred and twenty and one hundred and 

 thirty days. The yields of 17 plats at Washington varied between 4f and 15 bushels 

 to the acre, with an average of 9J bushels. 



The name, Mammoth, is very suitable for this variety, and is coming into use for 

 it in the agricultural press and by some seedsmen. 



Numbers and sources of lots grown.— Agroat. No. 1195, "Yellow," S. P. I. No. 4285, 

 Virginia; Agrost. No. 1300, "Late," F. Barteldes & Co.; Agrost. No. 1305, T. W. 

 Wood & Sons; Agrost. No. 1307, "Southern," T. W. Wood & Sons; Agrost. No. 1308, 

 Iowa Seed Co.; Agrost. No. 1309, Johnson & Stokes; Agrost. No. 1310, Plant Seed Co.; 

 Agrost. No. 1311, C. J. McCullough; Agrost. No. 1314, "Late Yellow," Peter Hen- 

 derson & Co.; Agrost. No. 1315, Northrup, King & Co.; Agrost. No. 1465, "Yellow," 

 Breck & Sons; Agrost. No. 1466," Yellow," Texas Seed and Floral Co.; Agrost. No. 1472, 

 "Southern," J. M. Thorhuru & Co.; Agrost. No. 1477, Hammond Seed Co.; Agrost. 



98 



