Jan. 6-Mar. 31, 1923 
Index 
1019 
Page 
Seed-Continued. 
Johnson grass, pericarp and integument 
structure, characteristics and composi¬ 
tion. 193-222 
potato, treatment for control of Cortidum 
vagum . 764-768 
Seeding date, wheat, relation to rosette 
disease. 795~797 
Seedling blight, com and wheat, develop¬ 
ment, influence of soil temperature and 
moisture.837-870 
Seeds— 
apple— 
after-ripening and germination. 153-161 
removal of seed coats, effect on germina¬ 
tion. 157-159 
respiration. 117-130 
crop, iron and manganese content.395-399 
germination, use of alternating tempera¬ 
tures. *95-332 
grass— 
bleaching with Javelle water, compari¬ 
sons. 206-208 
coat structures, comparisons... 203-206,215-218 
respirometer, directions for use. 101-116 
Shapovalov, M., and Edson, H. A.: Parasit¬ 
ism of Sclerotium rolfsii on Irish Potatoes.. 41-46 
Shapovalov, Michael: Relation of Potato 
Skin Spot to Powdery Scab. 285-294 
Sheep, anthelmintics, tests of carbon tetra- 
chlorid. 180-182 
Shillinger, Jacob E., and Hall, Maurice C.: 
Miscellaneous Tests of Carbon Tetrachlorid 
as an Anthelmintic. 163-192 
Siegler, Eugene A., and Jenkins, Anna E.: 
Sclerotinia carunculoides, the Cause of a 
Serious Disease of the Mulberry (Morus 
alba) .833-836 
Silver nitrate, use in sterilization of seed grain 85-86 
Skinner, J. J., and Allison, F. E.: Influence 
of Fertilizers Containing Borax on the 
Growth and Fruiting of Cotton.433-444 
Skinspot, potato, relation to powdery scab. 285-294 
Smartweed, growing, experiments with day¬ 
light of different lengths. 876 
Smith, N. R„ and Lohnis. F.: Studies upon 
the Life Cycles of the Bacteria—Part II: 
Life History of the Azotobacter.401-432 
Smut, wheat. See also Bunt. 
Smuts, grain, history and infection meth- 
ods... 453-456 
Snails, infestation with nema parasites. 923 
Sodium nitrate, effect on wheat at different 
stages of growth. 56-62 
Soil- 
bacteria studies.401-432 
conditions, relation to wheat rosette dis¬ 
ease. 779^782 
disinfection, for control of wheat rosette, 
experiments.... 782-783 
infestation, relation to com diseases.. 587,591-625 
infested, cause of seedling blight of com and 
wheat.840,868 
moisture— 
influence on development of blights 
caused by Gibberella saubinetii .837-870 
presevation, by mulches. 727-742 
pastures, relation of burning to tempera¬ 
ture. 638-639 
temperature, influence on development of 
blights caused by Gibberella saubinetii. . 837-870 
temperatures, relation to pathogenicity of 
Cortidum vagum on the potato. 761-770 
treatment, effect on destructiveness of root- 
rots. 806-807 
Soils— 
greenhouse, treatment for lettuce drop. 645, .652-653 
inoculation with Cortidum vagum t experi¬ 
ments. 762-764 
Sorghums, growing, experiments with day¬ 
light of different lenths. 874,875 
Sorrel, growing, experiments with daylight 
of different length.876,899 
Soybeans— 
growing and fruiting relation to daylight 
length.880,881-883,884,885,896,900,905-906 
seed, content of iron and manganese. 397,399 
Sphaeropsis malorum t pycinidia, studies. 744 
Page 
Spicaria spp., action on potato skin. 286,287 
Spondylocladium atrovirens , action on potato 
skin. 285 
Spongospora subterranea, cause of potato skin- 
spot. 287-289,292-293 
Spraying castor beans, for control of gray 
mold. 707-711 
Squirrel com, poisonous properties. 69-78 
Staggerweeds, little, botanical classification, 
and common names. 70 
Stalks, com, pentosan content.657,658 
Starch, determination in presence of inter¬ 
fering polysaccharids.995-1006 
Steiner, G., Cobb, N. A., and Christie, J. R.: 
Agameris decaudata Cobb, Steiner, and 
Christie; a Nema Parasite of Grasshoppers 
and Other Insects.921-926 
Stemrot, potato, origin in Sclerotium roll - 
sii .41,42,43,44 
Stem rust, wheat- 
infection of Baart and Kanred wheats, eco¬ 
logical studies. 131-152 
varietal resistance, relation to hydrogen-ion 
concentration...373-386 
Stimulating the Growth of Azotobacter by 
Aeration: O. W. Hunter.665-677 
Straw, wheat, ash and silica content, effect of 
fertilizers. 67 
Strawberry, rot- 
caused by Schizoparme straminea, study of 
the fungus. 75<>-757 
fungus, pycnidium cavities, origin. 748-750 
Strongyles, control by carbon tetrachlorid, 
notes. 179.181,182,184,189 
Structure, Physical Characteristics, and Com¬ 
position of the Pericarp and Integument of 
Johnson Grass Seed in Relation to its 
Physiology: George T. Harrington and 
William Crocker. 193-222 
Studies Upon the Life Cycles of the Bacteria— 
Part II. Life History of Azotobacter: F. 
Lohnis and N. R. Smith.401-432 
Sudan grass seed, comparison with Johnson 
grass seed. 193,202-2^9 
Sugar cane, infection with downy mildew in 
Philippines, notes.. 245,246,252,253,257,272,273 
Sulphate, potassium, relation to sand drown 
of tobacco. 28-29,30-35 
Sulphuric acid, effect on wheat at different 
stages of growth.57-6* 
Summer Irrigation of Pima Cotton: R. D. 
Martin and H. F. Loomis.927-946 
Sunflower, seed, content of iron and man¬ 
ganese.398,399 
Swine, heredity studies. 557-582 
Swingle, Walter T., and Robinson, T. Ralph: 
Two Important New Types of Citrous 
Hybrids for the Home Garden—Citrange- 
quats and Limequats.229-239 
Take-all disease, wheat, distinction from 
rosette disease, cause, etc. 771,772, 777 
Temperature— 
effect on development of Aphis pomi .984-986 
soil— 
influence on development of seedling 
blights of com and wheat.837-870 
relation to pathogenicity of Cortidum 
vagum on the potato. 761-770 
Temperatures, alternating, use in germina¬ 
tion of seeds...'.295-332 
Teosinte, infection with downy mildew in 
Philippines, notes... 245,246,252,253,257,272,273 
Texas, castor bean, gray mold outbreak... 681,682 
Texas rootrot (cotton rootrot). 525 
Tillering, excessive, symptoms of wheat 
rosette disease. 775-777.787 
TiUetia tritid (bunt).445-480 
Time Required for Food to Pass Through 
the Intestinal Tract of Fowls: B. F. Kaupp 
and J. E. Ivey. 721-725 
Tithonia rotundifolia, growing, experiments 
with daylight of different lengths. 876 
Tobacco— 
increase in height, relation to daylight 
length. 887 
injury by sand drown, description.27-28 
inoculation with Bacterium melleum, ex¬ 
periments. 485-486 
