Oct. 4. 1915-Mar. 27, 1916 
Index 
1205 
Soil—Continued. Page 
conditions, effect of, on protozoa. 479-485 
effect of— 
alkali salts in, on germination and growth 
of crops. 1-53 
Vigna sinensis on properties of. 443-447 
heterogeneity of, in variety tests, method 
of correcting for. 1039-1050 
North Carolina— 
mineralogical composition of..571-580 
relation of petrography of, to fertilizer re¬ 
quirements. 569-582 
yields of Gossypium spp. on. 578-580 
Utah, analysis of. 14 
protozoa— 
activity of. 477-488 
separation of.. 13 7-140 
properties of, influence of growth of Vigna 
sinensis on. 439^448 
type of, effect on germination. 1167 
Soil Temperatures as Influenced by Cultural 
Methods (paper). 173-1 79 
Soilstain— 
causal organism of. 998 
effect of, on Ipomoea batatas . 996 
factors favorable to development of. 996 
symptoms of. 996 
Soilstain, or Scurf, of the Sweet Potato 
(paper). 995-1002 
Sofa max . See Glycine. 
Solanum — 
jasminoides , host plant of LePtinoiarsa de- 
cemlineata . 917 
tuberosum — 
absorption of boron by.879-884 
analysis of.45 7-458 
growth of mycelium of Phytophthora in- 
festans in. 74-80 
hibernation of Phytophthora infestans in. 71-102 
host plant of— 
Fusarium spp. 183-203 
Leptinotarsa decemlineata . 917-926 
Phytophthora infestans ... 59,66,67,71-102,183 
Rhizopus nigricans . 183 
Sporotrichum fiavissimum . 186 
Verticillium albo-atrum . 186 
infection of, by conidia of Phytophthora 
infestans . 85-87 
inoculation of, with Fusarium spp. 201-203 
relation of progeny of, to Phytophthora in- 
festans in parent tuber. 93-96 
translocation of mineral constituents of. 457-458 
Solar radiation, relation of, to transpiration. 631-63 4 
Solidago — 
bicolor , host plant of Comandra umbellata .. 134 
caesia, host of plant of Comandra umbellata, 134 
juncea, host plant of Comandra umbellata .. 134 
nemoralis, host plant of Comandra umbellata. 134 
speciosa , host plant of Comandra umbellata. 134 
Some Potato Tuber-Rots Caused by Species 
of Fusarium (paper). 183-210 
Sorghum. See A ndropogon sorghum. 
Soybean. See Glycine. 
Species, new. 204,466 
Sphaeropsis motorum, effect of low tempera¬ 
ture on. 652 
Spinacia oleracea , host plant oi Peronospora 
efiusa. . 59*67 
Spiraea salicifolia, host plant of Comandra 
umbellata . 134 
Page 
Spore, resting, of Phytophthora infestans .98-99 
Sporotrichum fiavissimum, parasite of Sola¬ 
num tuberosum . 186,201-203 
Spray- 
advantage of fineness in. 1179-1180 
advantage of uniformity in. 1179-1180 
flat, advantages of. 1179 
production of. 1177-1179 
variations in fineness of. 1180 
nozzle, new. 1177-1182 
adjustment of. 1181 
use of. 1181 
Stakman, E. C., and Jensen, E- (paper) Infec¬ 
tion Experiments with Timothy Rust... 211-216 
Star-apple. See Ckrysophyllum cainto. 
Steenbock, H. (paper), Diuresis and Milk 
Flow. 561-568 
Stellaria media , host plant of Peronospora 
alsinearum . 59,67,68 
Stereum subpileatum — 
causal organism of honeycomb heartrot.. 421-428 
description of sporophore of. 426 
distribution of. 427-428 
Stizolobium — 
dee/ingianum, effect of crossing on length of 
pod.405-420 
niveum, effect of crossing on length of pod. 405-420 
Stoma, movement of— 
factors influencing... 1012-1029 
relation of, to infection by Cercospora beti- 
cola . 1011-1038 
Sugar- 
beet. See Beta vulgaris. 
effect of— 
on ammonification. 1169 
on carbon-dioxid evolution. 1169-1170 
maple. See Acer saccharum. 
Sulphur- 
effect of, on growth of plants. 771-780 
compounds, relation of, to plant nutri¬ 
tion. 233-250 
Sunflower. See Helianthus annuus. 
Surface, F. M., and Pearl, R. (paper), A 
Method of Correcting for Soil Heterogeneity 
in Variety Tests. 1039-1050 
Surface floats, measurement of water velocity 
with. 222-226 
Sweet potato. See Ipomoea batatas. 
Sweet-Potato Scurf (paper). 787-791 
Swine- 
deviations per generation in size of litter 
in. 1150,1154 
fertility in, nongenetic factors affecting. 1146-1148 
value of herdbook data. 1148-1149 
individual evidences of segregation in. 1154-1155 
inheritance of fertility in... 1145-1160 
litter frequency in. 1149-1158 
Tannase, determination of, in Malus sylves- 
tris .-. hi 
Taubenhaus, J. J. (paper), Soilstain, or Scurf, 
of the Sweet Potato... 995-1002 
Temperature— 
cold-storage, effect of, on Ceratitis capitata. 657-666 
effect of, on movement of water and vapor, 
and capillary moisture in soils. 141-172 
effective, in insect development.1185-1198 
