858 WEED FLORA OP IOWA 



Kienitz, M. Ueber Ausfiihrung von Keimproben. Forst. Fl. 6. 



Abs. in Bot. Cent. 1:52-53. 1880. 

 Kinzel, W. Concerning the germination of dodder seed. Naturw. 



Ztschr. Han.- u. Forstw. 1903: 104-110. 



On the germination of half-ripe dodder seed. Landw. Vers. 



Stat. 55:255-256. Abs. in Exp. Sta. Rec. 13:658. 

 Kolkwitz, R. Ueber die Athmung ruhenden Samen. Ber. Deutsch. 



Bot. Gesells. 19:285-287. 1901. 

 Korsmo, E. On the viability of weed seeds after passing through 



the digestive tract of farm animals. Tidskr. Norske. handbr. 



18 :223-230. 



Kuntze, R. E. Germination and vitality of seeds. Torrey Bot. 



Club. 1901. 

 Lehmann, Ernst. Ueber die Beeinflussung der Keimung lichtemp- 



findlicher Samen durch die Temperatur. Zeits. f. Bot. 4:465- 



529. 

 Laschke, W. Einige vergleichende Untersuchungen iiber den Ein- 



fluss des Keimbettes, sowie des Lichtes auf die Keimung ver- 



schiedener Samereien. Landw. Vers. 65:295. 

 McCarthy, Gerald. Seed-testing; its uses and methods. Bull. 



N. C. Agr. Exp. Sta. 108:349-415. 

 Munerati, O., & Zapparoli, T. V. On investigations on the ger- 

 mination of seeds of some weeds. Staz. Sper. Agr. Ital. 



44:40-50 (1911). 

 Nobbe, F. Handbuch der Samenkunde. 631. Berlin. 1876. On 



viability of seeds, see Landw. Vers. Stat. 13 :233. 

 Pammel. L. H., Buchanan, R. E., & King, C. M. The vitality, 



adulteration and impurities of clover, alfalfa, and timothy 



seed in Iowa in 1906. Bull. la. Agr. Exp. Sta. 88:69. 

 Pammel, L. H., and King, C. M. Delayed germination. Proc. la. 



Acad. Sci. 18:20-33. 



Results of seed investigations for 1907. Bull. la. Agr. Exp. 



Sta. 99:71-91. 



Results of seed investigation for 1908 and 1909. Bull. la. 



Agr. Exp. Sta. 115:156-177. 

 Pammel, L. H., & Lummis, G. M. The germination of weed seeds. 



Proc. Soc. Prom. Agr. Sci. 1903: 89-92. 

 Panton, J. H. Impurities in clover seed. Bull. Ontario Agr. Coll. 



98 :8 ; 10 f. 



Weeds of Ontario. Rept. Ont. Agr. Coll. & Exp. Farm. 



19 :27-32. 



