INDEX OF SUBJECTS 



873 



Bacterium radiobacter, 119, 120, 126, 

 447, 642 

 solanacearum, 806, 814 

 stutzeri, 186, 187, 204, 212, 549, 637, 



762; 

 tumefacier 806 

 typhi, 805 



typhosum, 777, 803, 806 

 ulpiani, 187 

 umbilicatum, 154 

 ureae, 209, 211 

 violaceum, 154 

 viscosum, 201 



vulgare, 121, 154, 155, 163, 181, 182, 

 184, 209, 212, 368, 485, 489, 490, 

 492, 507, 508, 612, 613, 614, 637, 

 663, 762 

 vulpinus, 186 

 zopfii, 154 

 Bacterized peat, 831 

 Bacteroids, 126, 130, 140 

 Bactridium butyricum, 161 

 Balantiophorus, 335 

 Baptisia tinctoria, nodule formation 



by, 136 

 Barber pipette method, for isolation of 

 actinomyces, 305 

 for isolation of algae, 218, 220 

 for isolation of bacteria, 55 

 for isolation of protozoa, 320 

 for isolation of spores of s fungi, 246 

 Basidiomycetes in soil, 3, 243, 257, 



260, 277, 278, 282, 459 

 Bastiana, 350 

 Beaker method, 687 

 Beetles in soil, 361 



Beggiatoa, 79, 80, 81, 100, 397, 398, 606 



Benzene ring compounds, as a source 



of humus in soil, 692 



decomposition of, by bacteria, 204, 



465 



Benzoic acid, formation from hippuric 



acid, 212 

 Benzol, oxidation of, 97, 205 

 Bersem clover, nodule bacteria of, 136 

 Betaine, 486 

 Bibionidae, 358 

 Biochemical activities of algae, 230 



Biomyxa vagans, 331 



Biotypes in nodule bacteria, 137, 824 



Bispora, 256 



Black locust, nodule bacteria of, 137 



Black medick, nodule bacteria of, 136 



Blaniulus, 355 



Blepharisma, 336 



Blue-green algae (see Cyanophyceae) 



Bodo, 330, 333 



Boletus, 257, 276, 278 



Boron, influence of, on Azotobacter, 581 



Botrydium, 229 



Botryosporium, 229, 253 



Botrytis, 3, 244, 254, 258, 264, 266, 779 



Brackydesmus, 355 



Braconidae, 361 



Broad bean, nodule bacteria of, 136 



Buffer content of soil, 635 



Bumilleria, 225, 229 



Bunonema, 347, 350 



Bur clover, nodule bacteria of, 136 



Butyl alcohol, formation of, by bac- 

 teria, 178 



Butyric acid bacteria, 106, 108, 155, 

 172, 175 

 in manure, 30 

 numbers of, in soil, 38 



Butyric acid, formation of, by bacteria, 

 178,204,412,439 



Caconema radicicola, 348, 349 

 Caffeine, use of, for stimulation of 



bacteroid formation, 131 

 Calcium, accumulation of, by bacteria, 

 663 

 as a bacterial nutrient, 664 

 influence of, on biological activities 



in soil, 689 (see also Lime) 

 cyanamide, decomposition of, 211 

 influence of, on nitrogen-fixation, 576 

 oxide as an agent of partial steriliza- 

 tion, 743 

 transformation of, in soil, 662-664 

 Callidina, 351 

 Calluna vulgaris, mycorrhiza formation 



by, 276, 277, 281,283 

 Calothrix, 227 



