614 
Journal of Agricultural Research 
Vol. XIV 
4 
Azotobacter— Page 
effect of hydrogen-ion concentration on- 332 
relation of soil reaction to growth. 265-271 
Bacteria— 
alfalfa, effect of hydrogen-ion concentration 
on. 329 
legume- 
effect of hydrogen-ion concentration on 330-331 
formation of nodules by. 320 
identification.319-323 
influence of— 
acidity on growth of. 319 
alkalinity on growth of. 319 
sodium hydroxid on reproduction of.. 323 
sulphuric acid on. 323-328 
lupine, effect of concentration of hydrogen- 
ion. 328-329 
nitrogen-assimilating— 
influence of— 
sodium hydroxid on. 228-332 
sulphuric acid on. 328-332 
nitrogen-fixing, reproduction of.323-333 
Bark, tan, use as bedding material. 187-190 
Barley. See Hordeum spp. 
Beet leafhopper. See Eutettix tenella. 
Beet, sugar. See Beta vulgaris. 
Berg, W. N. (paper): Concentration of Symp¬ 
tomatic Anthrax (Blackleg) Toxin. 263-264 
Beta vulgaris, curly-top infection through 
Eutettix tenella . 393~394 
Bethel, E., et al. (paper): Pinon Blister 
Rust. 411-424 
Beyer, A. H., and Luginbill, P. (paper): 
Contribution to the Knowledge of Toxop- 
tere graminum in the South. 97-110 
Biotite, availability of potash in. 297-316 
Black myrobalan. See Terminalia chebula. 
Blackleg— 
improved methods of immunization 
against. 253-262 
toxin, concentration of. 263-264 
Blister-rust, pifion, caused by Cronartium 
ocddentale . 411-424 
Blood, rat, recovery of trypanosomes from.. 573-576 
Bluegrass, Kentucky. See Poa pratensis. 
Botrytis sp., casual organism of stem lesions of 
Solanum tuberosum . 213-220 
Brassica — 
napus, food-plant of Pemphigus populi- 
transversus . 585 
nigra, food plant of Pemphigus populi - 
transversus . 585 
oleracea — 
botrytis, food plant of Pemphigus populi- 
transversus . 585 
capit at a, food plant of Pemphigus populi- 
transversus . 577“594 
gemmifera , food-plant of Pemphigus 
populi-transversus . 585 
host of Plasmodiophora brassicae . 543-572 
tissue invasion of by Plasmodiophora 
brassicae . 543-572 
rapa, food plant of Pemphigus populi- 
transversus . 578 
Broccoli. See Brassica oleracea botrytis . 
Broom com. See Andropogon sorghum. 
Brussels sprouts. See Brassica oleracea 
gemmifera. 
Buckwheat. See Fagopyrum esculentum. Page 
Butter fat, percentage in cow’s milk. 67-96 
Butyric acid. See Add, butyric. 
Cabbage. See Brassica oleracea. 
Caenurgia — 
crassiuscula, female, at light traps. 136-142 
erechtea, female, at light traps. 136-142 
Calcium— 
carbonate, effect on solubility of potash in 
soil-forming minerals. 297-316 
effect on potash absorption by different 
crops. 297-316 
nitrate, requirement for buckwheat in cul¬ 
ture solutions. 151-175 
Calophyllum inophyllum, food plant of 
Cerotitis capitata . 606-608 
Can Biologic Forms of Stemrust on Wheat 
Change Rapidly Enough to Interfere with 
Breeding for Rust Resistance? (paper).. 111-124 
Carambola. See Averrhoa carambola. 
Carpocapsa pomonella, female, at light traps 146,148 
Carruth, F. E., and Withers, W. A. (paper): 
Comparative Toxidty of Cottonseed Prod¬ 
ucts. 425-45* 
Carsner, E., and Stahl, C. F. (paper): Obtain¬ 
ing Beet Eeafhoppers Noli virulent as to 
Curly-Top... 393-394 
Casimiroa edulis — 
food plant of Ceratitis capitata . 606-608 
resistance to Citrus-canker. 340 
Cattle— 
occurrence of cocddioidal granuloma in. 533-54* 
value of Sudan-grass hay as feed for. 176-185 
Cauliflower. See Brassica oleracea botrytis. 
Ceratitis capitata, parasitism in Hawaii in 
1917. 605-610 
Chaetospermum glutinosa, resistance to Citrus- 
canker. 34r 
Chaleos exotica, resistance to Citrus-canker... 340 
Cherry- 
French. See Eugenia uniflora. 
wild. See Prunus spp. 
Chilcott, E. C., and Cole, J. S. (paper): Sub¬ 
soiling, Deep Tilling, and Soil Dynamiting 
in the Great Plains. 481-521 
Chinese orange. See Citrus japonica. 
Ckloridea obsoleta, female, at light traps.... 147/148 
Chrysophyllum olivaeforme, food plant of 
Ceratitis capitata . 606-608 
Cidtrange, resistance to Citrus-canker. 350 
Cirphis unipuncta, female, at light traps... 136-143 
Citradia, resistance to Citrus-canker. 349- 
Citrandarin— 
overwintering of Citrus-canker organism 
in. 523-524 
resistance to Citrus-canker. 350 
Citrange— 
resistance to Citrus-canker.348-349* 
Rusk, overwintering of Citrus-canker organ¬ 
ism in. 523-524 
Savage, overwintering of Citrus-canker or¬ 
ganism in. 523-524 
Citrangequat, resistance to Citrus-canker_ 350 
Citranguma, resistance to Citrus-canker. 350 
Citreae, susceptibility to Citrus-canker.340-341 
Citrinae, susceptibility to Citrus-canker. 341 
Citropsis Schweinfurthii , resistance to Citrus- 
canker. 341 
