Iiulcx 



.355 



St.il)!.' iiiaimus, 107, .■M).?-;M2; .scf 



(iImi Manure 

 Stachyhiytnj.s, 115 

 Stainod soil preparations, 41 

 Staphylococcus alhtts. 2fi8 

 S. aureus, 268 

 S. cUrcus, 26<S 

 S. enter it idis, 268 

 Starch decomposition, 110 

 Steam sterilization, 255 

 Stemphylium, 167, 328 

 Stercuni ru^osuin, 121 

 Stcri^ntatocystis, 278 

 Sterilization of soil, 297-299 

 Stinuilation of organisms, 93 

 Strains ot nodule bacteria, 213-214 

 Straw, composition ot, 314 



efFect of, 139 

 Streptococcus pyogenes, 270 

 Streptomyces, 35, 78, 79, 82, 264 

 S. coelicolor, 119 

 S. griseus, 78, 82, 277, 279 

 S. lavendulae, 278 

 S. sca/;/c*, 289, 292, 294 

 S. viridochromogenus, 120 

 Struggle for existence, 264 

 Stubble, 131 



Sugar and nitrogen fixation, 206 

 Sugar fungi, 84 

 Sulfate-reducing bacteria, 72 

 Sulfur, effect of, 230-235, 296 



transformation of, 62-63 

 Sulfur bacteria, 66-68, 232 

 Sulfur composts, 231, 240 

 Sweet-potato scurf, 296 

 Symbiotic nitrogen fixation, 52, 61, 



208-229 

 Symbiotic nitrogen-fixing bacteria, 



193 

 Synchytrium endobioticum, 287 

 Systematic bacteriology, 9 



Taurine, 232 



Temperature, effect of, 49, 52, 53, 



219, 316 

 Terrestrial fungi, 83 

 Terricolous fungi, 83 

 Thamnidiuni elegans, 278 

 Thecamoebae, 91 



Tlicrniodclinoniyccs, 7 I 



Thermogenic bacteria, 70 



Tliernioniyces, 71 



Thermopiiilic bacteria, 53, 70-71, 73 



Thermophilic microorganisms, 73 



Thiclavia, 291 



Thiohacillus, 66 



Th. denitrificans, 71 



Th. novellus, 66 



Til. tliiooxidans, 66, 67, 233, 238 



Th. thioparus, 18, 66 



Thiotlirix, 67 



Thorn, C, 23 



Tillage, effect of, 332 



Torula ammoniacale, 72 



T. .sphaerica, 268 



T. .suganii, 278 



ToruJopsis, 278 



Toxic substances, 280 



Toxins in soil, 254 



Trametes pini, 120 



Transient microbes, 59 



Trichoderma, 39, 83, 86, 112, 175, 



178, 239, 264, 292 

 T. koningi, 120, 289 

 r. lignorum, 271, 278, 289, 293, 294, 



329 

 Trichok)nia aUnitu, 86 

 Trichothecium, 278 

 T. roseum, 293 

 True humus, 125 

 Tuber mycorrhiza, 87 

 Tumbler method, 19, 33 

 Turf, 134 



Tylenchus dipsaci, 290 

 T. dipsae, 290 

 r. tritici, 290 



Urea bacteria, 72-73 



Urea, decomposition of, 119, 170- 



171 

 Uric acid, decomposition of, 168 

 Urine, decomposition of, 139 

 UrohaciUus duclauxii, 73 

 Ur. maddoxii, 73 

 Ur. pesteurii, 73 

 Ustilago, 278 



