1210 
Journal of Agricultural * Research 
Vol. XXXI 
Seed— p age 
corn, advantage of large kernels. 1043-1044 
cowpea, transmission of bacterial spot... 860-862 
germination- 
delay in white pine, cause.. 899 
tests, freezing in air and snow. 895 
selection in control of bacterial spot_ 862 
stratification, western white pine- 890-891 
tomato, infection with leaf mold, and 
transmission. 534-540 
western yellow pine, sowing..1101-1112, 
1116,1117,1120 
wheat, study, review.1179-1180 
Seedlings— 
corn- 
etiolated, acidity of the aqueous ex¬ 
tracts. 1156-1157 
Etiolated, Nitrogen Metabolism: S. L. 
Jodidi_ 1149-1164 
partition of water-soluble nitrogen. _. 1159-1160 
maize, age as a factor in resistance to 
sodium chloride.... 633-640 
pine, measurements and transplanting 
data, western yellow pine.1115-1116 
transplanting, western yellow pine nurs¬ 
eries. 1104 
wheat- 
chemical and physical changes- 727-744 
freezing, effects. 728,729 
Translocation of the Food Materials: 
L. Edwin Yocum.. 727-744 
yellow pine, selection for analysis..^- 1122 
Seeds— 
afterripening and period of rest, tests- 897-899 
corn, proteolytic enzymes present-1162-1163 
date palm, limit of production. 450-451 
Enemy, Bruchus obtectus, Say, Effect of 
Low Temperatures on: Walter Carter. 165-182 
Noble and Silver Fir, Western White 
Pine, and Douglas Fir, Effect of Heat, 
Laboratory Tests: J. V. Hofmann.197-199 
Septoria apii Chester, cause of leaf spot in 
celery, and effect. 289 
Sex— 
Genetics in Hemp: Hugh C. McPhee... 935-943 
Relation to Weight of Eggs and Weight 
of Chicks: M. A. Jull and J. P. Quinn. 223-226 
Shade- 
influence of different degrees on germi¬ 
nation in the seed bed, western yellow 
pine_ 1113-1115 
usefulness in nursery, experiments-1110-1116 
Sharp, Paul Francis, and Whitcomb, W. 
O.: Germination of Frozen and Non- 
frozen Wheat Harvested at Various 
Stages of Maturity..1179-1188 
Shaw, William T.: Observations on the 
Hibernation of Ground Squirrels- 761-769 
Shorthorns, two-line pedigree samples. 379-380 
Show, S. B.: Yield Capacities of the Pure 
Yellow Pine Type on the East Slope of 
the Sierra Nevada Mountains in Cali¬ 
fornia.. 1121-1135 
Sida carpinifolia L., natural host of Dysder- 
cus obscuratus . 1138,1139,1141,1147 
Sierra Nevada Mountains, California, Yield 
Capacities of the Pure Yellow Pine 
Type on the East Slope: S. B. Show. 1121-1135 
Silage, Mineral Composition of Sunflowers 
in: Ray E. Neidig..1165-1171 
Silica- 
colloidal— 
effect on phosphate as millet fertilizer.. 249-254 
effect on rock phosphate decomposition 254-256 
Relation to Efficiency of Phosphates: 
P. L. Gile and J. G. Smith. 247-260 
gel, relation to phosphate as fertilizer- 256-258 
Silicon, presence and need in plants.. 256 
Sinclair, W. B., Johnson, A. H., Evans, 
R. D., Harris, J. Arthur, and Hoffman, 
W. F.: The Leaf-tissue Fluids of Egyp¬ 
tian Cottons_____ 1027-1033 
Silver fir. See Fir. 
Skim Milk and Cream, Bacterial Count Re¬ 
lated to Bacterial Count of the Whole 
Milk: C. S. Leete..... 695-699 
Smith— 
Clayton O.: Crown-gall Studies of Resist¬ 
ant Stocks for Prunus. 957-971 
J. G., and Gile, P. L.: Colloidal Silica 
and the Efficiency of Phosphates. 247-260 
N. R., and Worden, S.: Plate Counts of 
Soil Microorganisms. ..501517 
Smut, onion, study of susceptibility.. 275-286 
Smuts, corn, relation of resistance to num¬ 
ber of kernel rows. 94-97 
Snider, George G., and Hoagland, Ralph: 
Vitamin A in Beef, Pork, and Lamb.. 201-221 
Snyder, Robert S.— 
and Neidig, Ray E.: Mineral Composi¬ 
tion of Sunflowers Grown for Silage.. 1165-1171 
and Nordby, J. E.: Influence of Field-pea 
Rations on the Quality of Pork.1173-1178 
Soap emulsions, notes on.. 59-60 
Sodium- 
Chloride— 
Resistance of Maize Seedlings, Age as a 
Factor: G. J. Harrison and C. J. 
King. 633-640 
use in potato wart control .. 317 
Variation in a Wheat Ration, Effect: 
George A. Olson and J. L. St. John... 365-375 
Soil- 
Ammonia Content and Its Relation to 
Total Nitrogen, Nitrates, and Soil Re¬ 
action: Horace J. Harper. 549-553 
Disinfection, Steam and Chemical, with 
Special Reference to Potato Wart: N. 
Rex Hunt, F. G. O "Donnell, and Rush 
P. Marshall... 301-363 
heterogeneity, Student’s method not ap¬ 
plicable.. 949-956 
homogeneity, Student’s method appli¬ 
cable_ 949-956 
Microorganisms, Plate Counts: N. R. 
Smith and S. Worden.501-517 
Moisture— 
and Temperature, Influence on Infec¬ 
tion of Young Wheat Plants by 
Ophiobolus graminis: H. H. McKin¬ 
ney and R. J. Davis... 827-840 
determination. 332-333 
relation to yields and protein content 
of wheat. 1193-1196,1198 
nitrates, relation to yields and protein 
content of wheat....1193-1196 
particles, relation to penetration of chem¬ 
icals_ 345-347 
penetration by- 
copper sulphate, alcohol, Qua-Sul, for¬ 
maldehyde, mercuric chloride.335-342,343-358 
fungicides...- 329-357 
relation to experiments made by Stu¬ 
dent’s method__- 950-955 
Temperature and Moisture, Influence on 
Infection of Young Wheat Plants by 
Ophiobolus graminis: H. H. McKinney 
and R. J. Davis..... 827-840 
tests. See Student’s method. 
tubes, preparation. 331-332 
water, effect on soil temperature. 442-443,445-446 
Soils— 
alkali. See Sodium chloride, 
disinfection— 
by chemical treatment- 308-321 
by steam-pan treatment- 302-308,321-329 
cost__- 318-321 
review of work_ 301-302 
moisture effect on pine nurseries... 1101 
penetration— 
by chemicals_ 335-338 
by fungicides_ 329-358 
by mercury, effect of high water table. 347-348 
laterally, by mercuric solutions. 348-349 
percolation by solutions- 335-337 
relationship to phosphate as fertilizer- 247-249 
temperature changes under steam pan... 321-329 
temperatures at Indio, Calif—. 442-443 
olutions, Surface Tension, Relations to 
Their Spreading Qualities in Spreaders 
for Spray Materials: R. H. Robinson.. 71-81 
