REVIEW OF THE LITERATURE. 15 



early ripening one. The amount of hu-k- i- greater in the starch- 

 poor grains than in full, plump grains, and there is a tendency toward 

 an increase of hu-k- a- tin- weight per 1,000 grains decreases. The 

 hu-k content doe- not seem to be influenced by the soil, fertilizers, or 

 width of drill-. It i- more a varietal characteristic and depends much 

 upon the length of the growing |x'riod. 



In their paper- on condition- affecting the quality of barley Munro 

 and Beaven" found that the amount of nitrogen in the grain depend- 

 more on tin- character of tl: than upon -oil condition-, and 



that the application of phosphates as a fort di/er improve- the quality 

 of barley to a greater extent than doe- the u-e of pota.-h, soda, or 

 magnc-ia. while l.aniyard manure increases the yield, but lowers the 

 general quality. They al-o found that the lack of color in a barley, 

 which i- often due to bad weather condition-, can be remedied by 

 artificial drying. Schneidewind ' -houed that with the -ame condi- 

 tion- of manuring. crop> which \\ere high in yield were gene rally low 

 in protein content. \Vein'- experiment- |M>inted out that nitrogen 

 and |>ho-phate- promoted protein formation and that potash in- 

 fluenced the yield and the percentage of -larch, thu- improving the 

 quality <>f the crop. II.- al-o -h.. \\.-d that the l.arl.-y plant required a 

 large amount of plant food at the early -tag''- of growth. 



Yoelcher ' -howed that the application of nitrogermn- fert il i/<-r- 

 alone gives a barle\ of l..\\ \\.-ight per lu-hel and of low valuation 

 for Invuing purpo-c-, hut of high quality from a dutUtaft -land- 

 point. He quotes Hall a- -living that the variety of the barley, 

 rather than the manure used, exerts the chief influence on the nitro- 

 gen content. Manuring ezertfl no influence on the thickne>s of 

 husks. In thi- connection Kckenluvcher ha- conclusively .-hown 

 that climatic condition- and -oil exert a far- greater influence on the 

 amount of nitrogen, the \\eight per l.ooo. jmd the weight per bushel 

 than doe- variety or -pecie-. Thi- author grew ', different varietie- 

 of barley in l*j different localitie- and found that every variety 

 grown in any one locality had very nearly the -ame percentage of 

 nitrogen, weight per 1,000, and weight per bushel, but that any one 

 variety when grown in the lij localitie- -howed a marked differ- 

 ence in compo-ition. in -i/e. and in weight of berry : in fact, whereas 

 in one locality a certain tyjn* of barley contained 9 per cent of pro- 

 tein, in another locality the protein cont-ent was over 14 per cent. 

 Tedin al-o ha- -hown that the protein content is not a race char- 

 acteristic, and Kiessling" has demonstrated that the nitrogen con- 

 tent of barley is more dependent on the weather conditions and 



".I. K..y. Apr. Soc., 1900, 11: 185. Wochenschr. Krau.. l!M7. 24: 491. 



chenschr. Brau., 1905. 2*2: L".I. f Bot. Centrbl., 1907, 104: 383. 



gesam. Brauw., 1906, 20: 141. o Zts. gesam. Brauw., 1908, 81: 84. 



* J. Inst. Brew., 1906, 12: 4v 



7-JL'W Bull. 12409 2 



