Apr. 7-June 30, 1923 
Index 
1059 
Page 
Waksman, Selman A., Wark, C. H., Joflfe, J., 
and Starkey, R. !♦.; Oxidation ol Sulphur 
by Microorganisms in Black Alkali Soils.. 297-305 
Walker. J. C.; Disease Resistance to Onion 
Smudge. 1019-1040 
Wark, Clara H.. Waksman, S. A., Joffe, J., 
Starkey, R. D.: Oxidation of Sulphur by 
Microorganisms in Black Alkali Soils_297-305 
Water— 
efifect on wheat growth, and nitrogen con¬ 
tent and location.. 943”944; 946-948 
requirements for conifers, studies.... 114,124,126 
Watery-Rot of Tomato Fruits: Fred J. Prit¬ 
chard and W. S. Porte.895-906 
Webworm— 
silver-striped, history, distribution, and 
habits. 415-426 
striped sod, distribution, description, life 
history, and control. 399-414 
Weimcr, J. T., and Harter, T. T.: 
Influence of the Substrate and its Hydro¬ 
gen-ion Concentration on Pectinase Pro¬ 
duction. 861-877 
Temi^rature relation of Eleven Species of 
Rhizopus: J. L. Weimer and h. E. Harter 1-40 
West Indies, citrus trees, injury by giunmo- 
sis. 193 
Weston, William H., jr.: A Method of Treat¬ 
ing Maize Seed to Destroy Adherent Spores 
of Downy Mildew. 853-860 
Wheat- 
Breeding for rust-resistance experiments. 457-470 
literature cited...995-996, loia 
studies. 980,994 
changes during development, factors affect¬ 
ing . 944-950 
composition of crops grown in different 
localities. 1047 
growth— 
effect of alkali salts in soil, experiments. 319-335 
habit, inheritance mode.461-463 
infection by stripe rust, studies.... 612-614,619 
ialmy hy Helminthosporinm spp . 642, 
694-700, 704 
Marquis-Kota cross, rust resistance, study.. 997- 
1012 
nitrogen content, factors affecting, and 
changes during development. 939-953 
study; historical review and litera¬ 
ture.939^41,951-952 
Wheat—Continued Page 
plants— 
food demands, experiments with nutrient 
solutions.41-50 
growing in nutrient solutions, experi¬ 
ments. 41-50 
protein percentage, effect of respiration. 1041-1048 
resistance to Puccmia graminis, inheritance 
mode, etc... 979-996 
rust resistance, inheritance mode_464-466, 467 
seed, transmission of stripe rust, investiga¬ 
tions and results. 615-618,619 
spacing, effect on nitrogen content.941-943 
stem rust— 
resistance in a cross of common wheat,. 457-470 
study of biologic form. 539-568 
Wheats, inoculation with stem rust for testing 
variety resistance.984-985 
White blast, com, cause, description, and 
control.643,712-718 
Willis, E. G., and Carrero, J. O.: Influence of 
Some Nitrogenous Fertilizers on the Devel¬ 
opment of Chlorosis in Rice.62X-640 
W'^ilt— 
bean, moisture effect. 749-752 
plum, relation to gum formation, notes., 227, 229 
Wiltir^, coefficients for forest soils and tree 
species. i4S-rs* 
Winkler, A. J.: A Study of the Internal 
Browning of the Yellow Newtown Apple. 165-184 
Winogradsky, S.: Experiments in Nitrogen 
Fixation, Medium Used. 185,190 
Winterkilling, resistance of conifers, compari¬ 
son of species. 154-160 
Wisconsin, peat soils, studies.474-483-485, 
^ 488-489 ,497 
Wounds— 
citrus bark, relation to gum formation... 224-226 
fruit trees, relation to injury by arsenical 
sprays. 531 
Wounds, sweet potato, relation to rots, ex¬ 
periments. 441,444-454 
Yeasts, protein content and food value, dis¬ 
cussion. 263 
Yellow— 
rust. See Rust, stripe, 
cabbage, cause and relation to soil tempera¬ 
ture and moisture. 55-86 
Zinc arsenite, preparation, and use as insecti¬ 
cide. 507-508,519 
Zones, forest, tree types and sites, study, ob¬ 
jects, and methods. 97-102 
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