1204 
Journal of Agricultural Research 
Vol. V 
Page 
Riperot, occurrence of, in Prunus spp.388-389 
Road, concrete, apparatus for measuring the 
wear °f. 95 *“954 
Roasting-ear worm. See Heliothis obsoleta. 
Rock, road-building— 
relation between the properties of hardness 
and toughness of. 903-907 
tests of. 903—907 
Roestelia — 
koreaensis — 
occurrence of— 
in America. 1004-1006 
in Japan. 1004 
in Oregon. 1005-1006 
parasite of— 
Cydonia vulgaris . 1005 
Pyrus sinensis . 1003-1006 
relation oi,toGymnosporangium koreaense. 1004- 
1006 
pkotiniae , syn. Gymnosporangium photiniae. 
Rommel, G. M., and Vedder, E. B. (paper), 
Beriberi and Cottonseed Poisoning in Pigs. 489- 
493 
Rootrot, occurrence of, in Panax quinquefo- 
Hum . 181-182 
Rosa — 
blanda, host plant of Comandra umbellate ... 134 
canina, host plant of Comandra umbellate ,.. 134 
Rosenbaum, J. (paper), Pathogenicity and 
Identity of Sclerotinia libertiana and Sclero- 
tinia smilacina on Ginseng. 291-298 
Rosenbaum, J., and Zinnsmeister, C. L. (pa¬ 
per), Altemaria panax, the Cause of a Root- . 
rot of Ginseng. 181-182 
Rot— 
brown, varietal resistance of plums to ,.. 365-396 
dry, caused by Fusarium spp. 195-201 
field and storage, occurrence of, in Solanum 
tuberosum . 187-201 
heart— 
honeycomb— 
distribution of.427-428 
occurrence of, in Quercus spp.421-42S 
resemblance to other rots.424-425 
pocketed. See Honeycomb heartrot. 
jelly-end, caused by Fusarium radicicola. 194-195 
ripe, occurrence of, in Prunus spp.388-389 
root, occurrence of, in Panax quinquefolium. 1 81- 
182 
white, occurrence of, in Panax quinque¬ 
folium .. 291—294 
Rubus — 
canadensis, host plant of Comandra umbel¬ 
late . 134 
procumbens, host plant of Comandra um¬ 
bellate . 134 
villosus, host plant of Comandra umbellata .. 134 
Rumax acetosa, host plant of Peronospora 
rumicis . 67 
Rust, timothy. See Puccinia phleipratense. 
Rye. See Secale cereale. 
Salt, alkali, in soils, effect of, on germination 
and growth of crops. 1-53 
Sawfly leaf miner. See Profenusa collaris. 
Scale, automatic transpiration, description 
of. 117-132 
Sclerotinia — Page 
cinerea — 
effect of low temperature on... 652 
parasite of Prunus spp.365-366 
toxicity of fruit adds to. 388 
fruciigena, parasite of Prunus spp. 366 
laxa, parasite of Prunus spp.365-366 
libertiana — 
identity of. 291-298 
pathogenicity of. 291-298 
smilacina — 
identity of. 291-298 
pathogenicity of. 291-298 
spp — 
parasite of Malus spp. 365 
pathological relations of. 374-390 
physiological relations.374-383 
relation of tannin content of, to resistance 
of Prunus spp.389-390 
taxonomy of.370-374 
Scurf of Ipomoea batatas — 
appearance of. 787 
injury caused by. 787-788 
occurrence of. 995-1002 
distribution of. 787 
Secale cereale — 
host plant of Puccinia phleipratensis .211-2x2 
occurrence of manganese in. 353 
transpiration of. 602-607 
Seed- 
effect of green manures on germination of.. 1161- 
1165 
oil, relation of green manure to injury of_ 1174 
Separation of Soil Protozoa (paper). 137-140 
Serious Disease in Forest Nurseries Caused 
by Peridermium filamentosum, A (pa¬ 
per). 781-785 
Shantz, H. L., and Briggs, I#. J. (paper)— 
An Automatic Transpiration Scale of 
Large Capadty for Use with Freely Ex¬ 
posed Plants. 117-13 2 
Hourly Transpiration Rate on Clear Days 
as Determined by Cyclic Environmental 
Factors. 583-650 
Shedd, O. M. (paper). Variations in Mineral 
Composition of Sap, Leaves, and Stems of 
the Wild-Grape Vine and Sugar-Maple 
Tree. 529-542 
Sisymbrium officinale , host plant of Cystopus 
candidus . 63 
Smilacina raccmosa, results of inoculation 
with Sclerotinia smilacina . 295-296 
Smith, E. F., and Bryan, M. K. (paper), 
Angular Leafspot of Cucumbers.465-476 
Sodium— 
effect of, on milk flow. 562-563,565-566 
arsenite, effect of, on plant growth.459-460 
salts, effect of, on plant growth. 5,10, isff 
Soil— 
. arid, nitrogen content of humus of. 909-916 
bacteria— 
effect of caldum sulphate on. 772-774 
effect of sulphur on. 772-774 
factors influencing longevity of.927-942 
non-spore-forming. 939 
relation of, to crop-producing power... 855-869 
slime-forming. 940 
moisture, description of apparatus for de¬ 
termining translocation of. 142-144 
