972 
Journal of Agricultural Research 
Vol. XXVII 
Smut, flag, wheat— Page 
bibliography.448-449,486-489 
physiological studies.425-450 
parasitism of causal organism.451-490 
Sodium— 
cause of impermeability of soils.687,690 
determination in soil solutions. 641 
hydrate, use in hydrolysis of straws. *48-251 
hydroxid— 
action on fiber. 247-248 
effect on grain hulls and other fibrous 
materials. 245-265 
nitrate, effect on wheat stem rust, experi¬ 
ments. 346-369 
removal from the soil.687-690 
Soil- 
constituents, solubility in water.648-651 
heterogeneity, corr ction discussion. 79"90 
infection with rootrot, studies.960-961 
wheat nematodes.941-944 
irrigated, water movement in.617-693 
leaching experiments.655-660,669-670 
permeability, relation to basis elements.. 663-668 
saline, leaching in the field.665-668 
solution— 
composition, important constituents... 639-644 
determination of constituents.640-644 
dilution, effect.651-660 
exchange reactions.660-663 
extraction methods.636-639 
relation to salts in soil.635-636 
sorghum, treatment with nitrates, experi¬ 
ments. 718-722 
type, relation to availability of water.624-626 
water, conditions relating to irrigation... 624-626 
water-holding capacity.618-621 
Solanin, occurrence in potato, and accumula¬ 
tion. 824-825 
Solutions, nutrient, acidity changes caused by 
growing seedlings. 207-217 
Sorghum— 
analysis method. 719 
grain, crosses, seed-color inheritance.53-64 
hydrocyanic-acid content, effect of nitrate 
solutions. 717-723 
indicator of nitrogen available in soils. 722 
leaves, carbohydrates, daily variation... 785-808 
South Africa, wheat flag smut,occurrence and 
importance.427,452 
Soybean, Mosaic; Seed Transmission and 
Effect on Yield: James B. Kendrick and 
Max W. Gardner. 91-98 
Soybeans— 
Biloxi; exposure to long-day and short-day 
light, results... I 35 “ I 39 .148 
Mosaic, symptoms and injuries.91.98 
varietal response to length of daylight. 119 
varieties susceptible to mosaic disease.91-94 
Sprit, nematode infection from wheat galls.... 934 
Spikelets, wheat, nematode galls, number 
and arrangement. 937-938 
Spores— 
Urocystis tritici, germination, viability, and 
overwintering.430-435,455-470,479-484 
walls in fungi, studies. 749-756 
Sporobolus airoides, physicochemical con¬ 
stants.911,9*2 
Stakman, E. C., and Aamodt, O. S.: The 
Effect of Fertilizers on the Development of 
Stem Rust of Wheat.341-380 
Stansbury Mountains, Utah, typical vege¬ 
tation.896-898,914 
Starch, determination in sheep feed. 253 
potato, varietal character. 829 
Stem rust— 
development, relation to nutrient salts... 394-401 
germ tubes, entrance to wheat, factors influ¬ 
encing.384-390,404 
infection, effect on Marquis wheat, experi¬ 
ments. 113 
resistance, relation to wheat acidity.725-735 
wheat, relation to fertilizers.341-380 
resistance, studies.381-4*2 
Stems— 
com, elemental composition and weight. .848-858 
wheat, structure, relation to rust resis¬ 
tance.390^-394.404-406 
Stem tumor, apple— Page 
caused by woolly aphis. 696 
comparison with crowngall.695-698 
Stevens, Neil E., and Jenkins, Anna E.: Oc¬ 
currence of the Current Cane Blight Fungus 
on Other Hosts.837-844 
Stolon, potato, structure and functions. 809- 
813,825-826 
Stone cells, potato, varietal differences.828-829 
Storage— 
apples, physiological studies. 1-38 
sweet potatoes, internal breakdown. 164-166 
Stove gas— 
constituents, removal by absorbents. 759-760 
effect on lemon coloration, analysis data, 
experiments. 758, 761-767 
Strawberry root louse, life history, notes. 513. 
516,517, 5 * 9 , 521 
Straw pulp, prepared feed, value. 249 
Straws, cooked, feed value.248-251 
Studies on the Parasitism of Urocystis tritici 
Koem., the Organism Causing Flag Smut of 
Wheat: Robert J. Noble.45*-49o 
Studies on the Potato Tuber: Ernst 
Artseh wager. 809-836 
Study of the Effects of Pumpkin Seeds on the 
Growth of Rats: Benjamin Masurovsky... 39-4* 
Subsoil, water-holding capacity.621-623 
Suckering, excessive, symptom of black- 
bundle disease of corn. 177,184-186,195-200 
Sugar, reducing, determination method, 
Munson-Walker-Bertrand. 599-603 
Sugars— 
determination in sap of wheat varieties.. 402-403 
in com and sorghum leaves. 790-801,805-806 
Sulphate, determination in soil solutions .... 641 
Sulphur, com plant, determination and dis¬ 
tribution. 850-858 
Sulphuric acid, effects on alkali soils.687-689 
Sunflowers, planting at two-week intervals, 
experiments and results.. 145-147 
Sunrise kafir, crosses with other sorghums, 
seed color of progeny. 55, 57- 58, 61,63 
Sweat room atmosphere, affect on lemon 
coloration, analysis data. 758 
Sweet potato— 
injury by Argus tortoise beetle.43.46,48.49 
root, anatomy, and internal breakdown 
of. 157-166 
Tannin, in potato cells. 824 
Temperature— 
effect on lemon coloration rate.. 762 
low, effect on eggs of A scaris lumbricoides . 167-175 
Tents, lemon, coloration experiments. 763 
Teosinte-maize hybrids, inheritance of char¬ 
acters. 537-596 
Tissue Fluids of Egyptian and Upland Cot¬ 
tons and Their Fi Hybrid: J. Arthur Har¬ 
ris, Zonji Wallen Lawrence, W. F. Hoff¬ 
man, John V. Lawrence, and A. T. Valen¬ 
tine . 267-328 
Titkonia rotundifolia, response to length of 
day. i 39 -* 4 <> 
Tissue fluids. See Sap 
Tobacco, Maryland Mammoth, response to 
daylight, length, experiments. *39 
Tomatoes, manganese in. 423 
Toxascaris limbata — 
effect of disinfectants on. 170 
eggs, exposure to low temperatures, re¬ 
sults. 167 
Transpiration, plants, effect of parasitic in¬ 
fection. 108-no 
Triumph potato, structural characters.. 827,8*8,830 
Tubers, potato, description, structure, 
growth, and chemical constitution. 809, 
813-819,823-825 
Tylenchus tritici — 
cause of nematode disease of cereals.925-956 
description and life history, longevity, 
etc. 939 - 941 , 949 ^ 952.954 
Upland cottons, comparison with Egyptian 
and hybrid cottons. 277-320 
Up-to-Date potato, structural characters..... 827, 
828,833 
