No. 2, March, 1921] AGRONOMY 99 



667. Ure, Ruby, and Beatrice, Larson. Single vs. double blotters in germination 

 testing. Seed World. 7^: 17. 1920. 



66S. Uyeda, Y. The proximate composition of Korean hemp and ramie. Jour. Indust. 

 Eng. Chem. 12: 573-576. 1920. — The pro.ximate composition of Korean hemp and ramie are 

 given as determined by the modifications of the analytical method proposed by Dore. — 

 Henry Schmitz. 



GG9. VoGEL, Prof. Dr. Die Impffrage der Nichtleguminosen. [Inoculation of non- 

 legumes.] Mittheil. Deutsch. Landw. Ges. 35:529-532. 1920. — The author reviews the 

 experiments that have been made with such substances as "U" cultures, "Nitrogen kompost," 

 "Biostickstoff," "Azogenin," "Agranit," and others, and finds them without value. How- 

 ever, a preparation known as "Guanol," a bacterized turf, has given good results. The same 

 quantity of nitrogen in Guanol has produced larger yields than when used as nitrate of soda. 

 The author states that Guanol acts through its relatively high nitrogen and potash content 

 and its content of water soluble organic substances which stimulate soil bacteria to increased 

 activity. — A. J. Pietcrs. 



670. Waldron, C. H. Notes on the germination of Kentucky bluegrass. Seed World 

 76:22. 1920. 



671. Warburg, Otto. Ueber die Fasern liefernden Boehmeria-Arten. [Species of 

 Boehmeria producing fiber.] Notizbl. Bot. Gart. Berlin 7^^:1-7. 1920. — The economic species 

 are Boehmeria nivea (L.) Hook. Am, and B. tenacissima (Roxb.) Gaud.— //. A. Gleason. 



672. Wenholz, H. Sunflowers as silage. Agric. Gaz. New South Wales 31 : 721-723. 

 1920. — This article summarizes results secured in United States and Canada. — L. R. Waldron. 



673. Wenholz, H. Cuzco maize. Agric. Gaz. New South Wales 31:701-702. 1920.— 

 This varietj' was not found adapted to New South Wales. The amount of fodder produced 

 was not up to the standard, and it produced ripe seed with difficulty. Silk did not develop 

 until 6 weeks after tassels appeared. — L. R. Waldron. 



674. Whipple, O. B. Thinning as a possible substitute for seed pieces of uniform size 

 in potato tests. Proc. Amer. Soc. Hort. Sci. 16: 179-181. (1919)— 1920.— By thinning potatoes 

 to a single stem, size and uniformity of size were improved. The author suggests "that varia- 

 tions in yields resulting from planting large and small seed pieces may be purely a matter 

 of stand.' The increased yield resulting from planting larger seed pieces may be largely due 

 to increased number of plants per hill. Field counts showed that plots of Russet Burbank 

 potatoes planted with 1.3-ounce seed-pieces average 2.27, 1.04-ounce seed-pieces averaged 

 2.22, and 1.3-ounce seed-pieces averaged 1.47 plants per hill. — H. A. Jones. 



675. Whipple, O. B. Correlation between depths of eyes and degeneration among potatoes. 

 Proc. Amer. Soc. Hort. Sci. 16 : 181-183. (1919)— 1920.— Results of field experiments show that 

 there is a correlation between shallowness of potato eyes and degeneracy. The writer is 

 convinced that there is no surer way of bringing about deterioration within these varieties 

 inclined to degeneration than by continual selection of shallow-eyed types. The Howard 

 Elliot, a deep-eyed, high-yielding variety was selected three years for shallowness of eyes. 

 At end of this time 90 per cent of the plants showed degenerate tendencies. — H. A. Jones. 



676. Will AM an, J. J., R. M. West, and C. P. Bull. Sorghum and sorghimi sirup manu- 

 facture. Minnesota Agric. Exp. Sta. Bull. 187:1-55. 17 fig. 1919.— The growing of sor- 

 ghum, preparation for the mill and the manufacture of the sirup are discussed. — A. C. Arny. 



677. Williams, C. B. Report of the Division of Agronomy, North Carolina Agricultural 

 Exp. Sta. North Carolina Agric. Exp. Sta. Ann. Rept. 42: 21-39. 1920.— Brief summary of 

 investigational work on soil fertility and fertilizer tests, on crop rotation and on crop improve- 

 ment by breeding and selection. — F. A. Wolf. 



