Apr. 7-June 30, 1923 
Index 
1057 
Seed—Continued. Page 
com, treatment for control of downy 
mildew.853-860 
grain, treatment to control disease. 662, 
667, 704, 727 
mosaic transmission, experiments....... 260-261 
wheat— 
color relation to rust reaction.986-987,994 
transmission of stripe rust, investigations 
and results.615-618,619 
Seedlings— 
cabbage, Fusarium disease, relation to soil 
temperature and soil moisture.55-86 
conifer, root growth habits, comparisons.. 157-160 
nursery, protection against snow mold, 
results. 744-746 
onion, susceptibility varieties to smudge. 1022 
Shade, tolerance of conifer species, compar> 
isons. 156-160 
Shedd, O. M.; An Improved Method for the 
Determination oi Nicotine in Tobacco and 
Tobacco Extracts.961-970 
Silage- 
preparation in small quantities, method.. 770, 796 
simjdower— 
acidity, relation to time of cutting.. 775-776, 779 
composition tables and discussion. 771-776 
sweet clover, composition and acidity... 797-799 
SiHcotungstic acid, use in determination of 
nicotine. 965-970 
Silver-Striped Webworm, Crambtis praefec- 
tuUus Zincken: George G. Ainslie.415-426 
Smudge, onion- 
relation to acidity of cell sap. 1033-1036 
resistance, by varieties. 1019-1040 
Smut— 
dimate rdations, temperature and mois¬ 
ture.— 578-589 
com, spore germination, influence of tem¬ 
perature. S 93 -S 97 
loose— 
growth, temperature range.S7x»S74>S7S 
oats, iuiection, rdation to soil factors... 56^575 
Snow mdd, control on coniferous nursery 
stock. 74I-748 
Snyder, Robert S., and Nddig, Ray E.: 
Sweet Clover Investi|»tions. 795^799 
Sunflower Investigations. 76^780 
Soap- 
action upon lead arsenates.87-D5 
addition to arsenical sprays.S 2 i> 524-5251 535 
. kinds used with lead arsenate sprays. 89 
Sodium— 
and caldum, dilute solutkms, pseudo¬ 
antagonism. 753-758 
Arsenate, effect on plant growth in black 
alkali soil. 332 - 334>337 
carbonate— 
presence in soil, treatment with various 
salts.320-335 
effect an Azotobacter content. 293-294 
effect an plant growth. 297-298 
salts, effect on plant growth in presence of 
otheri^ts.320-335 
Sod webworm, striped. 399-4*4 
Soft rot, sweet ix)tato, caused by Rhizopus 
spp. 455-456 
Soil- 
acid, destructive to Azotobacter growth... 767 
al^li salts, toxicity and antagonism.3*7-338 
bacteria, sulphur oxidation in alkaline 
soils. 299^304 
black alkali— 
sulphur oxidation.. 297-305 
transformation to white alkali. 29^299 
calcareous, rdation to rice chlorosis.626-631 
colloids, microscopic estimation. 879-883 
decomposition, ^ect on concrete drain- 
tile. 47 *- 5 oo 
effect on wheat composition study, review. 941 
examination for Azotobacter, methods and 
results. 908-932 
experiments with manganese as plant nu¬ 
trient. 784-792 
factors, rdation to loose smut of oats— 56^575 
forest, wilting coeflEldents for conifer 
spedes. i45-*52 
Soil^—Continued. Page 
mixing alkali and acid, effect on Azoto¬ 
bacter content. 390-292 
moisture— 
distribution, rdation to freezing.429-431 
movement upon freezing.427-432 
rdation to oats infection, by loose smut. 572-575 
reaction- 
effect of— 
changing on Azotobacter content.... 289-296 
on Azotobacter flora and nitrogen-fixing 
ability. 907-938 
temperature— 
influence on Fusarium disease in cabbage 
seedlings. 55-86 
rdation to oats infection by loose smut. 572-575 
Utah, sodium carbonate control experi¬ 
ments. 322-326 
Wisconsin and Miimesota, studies in regard 
to failure of tiles.474-497 
Soils, analysis methods, literature dted_937-938 
Solutions, nutrient, in orange culture experi¬ 
ments, composition. 804-806 
Some Graminicolous Spedes of Hdmintho- 
sponun—I; Charles Drechsler. 641-739 
Sorghum seed, mosaic transmission, experi¬ 
ments. 261 
Sorghums, susceptibility to mosaic disease. 259-260 
Soy bean- 
flour with com, feeding experiments.975-977 
growing in soils with and without manga¬ 
nese ... . 784,787,788,790-792 
oil m cow feed, effect on aads m butterfat, 
notes.382-392 
Spedes of Rhizopus Responsible for the 
Decay of Sweet Potatoes in the Storage 
House and at Different Temperatures in 
Infection Chambers: J. I. Eauritzen and 
L. E. Harter.441-456 
Spore— 
formation in Pucdnia. 891 
germination of— 
com smut, influence <rf temperature_593-597 
loose smut of oats, factors controlling... 577-597 
Spores in the Upper Air: Elvin C Stakman, 
Arthur W. Henry, Gordon C. Curran and 
Warren N. Christopher.599-606 
Spores— 
downy mildew, destmction by seed treat¬ 
ment. 853-860 
Rhizopus, temperature relations to germina- 
tiop.3-7.33-34 
upper air. 599-606 
Sporobolus spp., smut-grass caused by Heir 
mintkosporium raveneli . 643,688-690 
Spraying- 
experiments, tests of arsenical mixtures, 
and others. 508-534 
iron salts for control of chlorosis.. 625-626,630-632 
repeated, effect on injury by sprays__ 527-528 
Sprays^ 
arsenical— 
effects of adding other insectiddes, lime. 
etc.5**“526,533 
injury to foliage. 501-538 
lead arsenate, action of soap.87-95 
Spmce— 
Engelmann, physiological studies. 106-160 
Norway, susceptibility to snow mold. 741-744,748 
Spmce, nursery stodc, protection from Her- 
Potrichia nigra . 745 
seed germination and growth habits, 
notes. *57-*59 
Stakman, E. C., Eevine, M. N., and Bailey, D. 
E.: Biologic Forms of Pucdnia graminis on 
Varieties of Avena spp. 1013-1018 
Stakman, E. C., Henry, A. W., Curran, G. 
C., and Christopher, W. N.: Spores in the 
Upper Air. 599-606 
Starkey, Robert E., Waksman, S. A., Wark, 
C. H., and Joffe, J.: Oxidation of Sulphur by 
Microorganisms in Black Alkali Soils.297-305 
Statistical Study of the Comparative Mor¬ 
phology of Biologic Forms of Pucdnia 
graminis: M. N. Eevine. 539-568 
Stearic add, butterfat, analyses and notes.. 366-396 
