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MBROC UTC LI Geyer ee ee ee oO eon Me ne LUN eee 2 i 
Methods employed in bacteriological investigations of the soil at Fallon, Nev. 8 
NequinemrentstO; be Mets s: seer ce eee emma son ee ai Vee BS 8 
COMMESTOlsDAClerlae ee era en aa rene pimp 7. BR NEN SRR RY Re ag 1 9 
ANTOTU TN OVO EXCH DVOIO Uy eerste ree Rr peeR AES a) aa ee Ce aa eee a PRR CE 9 
INGUIN DYER ND TOYO aes Riese ns ae tie oe gn La is J a JA BSR Rens a ile i aS 10 
TD XETOWU RTH IKGEN A101 0. eR Ss teary eMart ec Semin its 1G J Ld iA 0 Ie ae cr ee iu 
INGIEROR CMphia LOH eas oy ape Rc, ON Rn a EG ie mien nba OOS omg ee et lat 
Miirrinyine nower olsols at ditterentidepthss.- oss. 4455) soe 12 
Niertircationsol samples ime solmtOnec: Som sce nee nee tee ects Oe cyanosis ei 19 
Shlondsrandisulphateses: som ace oe a te See on he Wen tee UNO ea ee ei 21 
iD YSTAMUTETN EY CEN AYO) As Ss Mages ah ae lesiek bs er pu Sa Bape We SCA ae rl aN SA en ra RES be ati UR Ren 22 
Relative numbers, ot bacteria im different soils. - 222255. soc) sees te 24 
Detailed study otsoil typiealioi extensive areas... 2.4.22. 21222. 225. 222. £. 2 
COVINGIUSTIOV IR BES eas ea ok ee pcr a Ns aR alata Ue co Ae ae 
TINS Oi aid as MR OS Aa ce AN SC as OR a 3 
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Or ppd O1 
PE EUS PRAT TO NS: 
Fig. 1. Location of sampling plats in the experimental fields of the Truckee- 
Carson Experiment Farm, south of Fallon, Nev.. aut 8 
2. Diagram showing the sania of ammonium siree: in somnyelen a 
soil from different depths from De 100 and 110, Truckee-Carson 
Expermient, Barminsc 2. 2a. oece-- 12 
3. Diagram showing the nitrification ate ammonium emlonaie dt in : enmales of 
soil from different depths from plat 120, Truckee-Carson Experiment. 
I LEU ere tess Sie ee saa Co a eee Was aid is eee Vieeekos 
4. Diagram showing the nitrification of ammonium sulphate in samples of 
soil from different depths from plat 130, Truckee- Carson Experiment 
EE TIEEN wheter ste Re Waa Se eta feet a A Che SAAS So PS Re Ses See cea 13 
5. Diagram showing the nitrification of ammonium sulphate in samples of 
soil from different depths from plats 160 and 170, Truckee-Carson 
IPE HEC HMR LUATIN Ae eee tow te oe sa ots at aoa wie Lh a Ore ete 14 
6. Diagram showing the nitrification of ammonium sulphate in samples of 
soil from different depths from plat 180 (poor soil) and plat 190 (good 
Soluce erickee-Carson Hxperiment Parm 22.220... 260 5 cola s ee 15 
7. Diagram showing the nitrification of ammonium sulphate in samples of 
soil from different depths from plat 200, Truckee-Carson Experiment 
IE Tuer red opr et Oye Vek ee og Nee iarene Sten Aspe tue, hers Sn dt agra Re a 16 
8. Diagram showing the nitrification of ammonium sulphate in Anis of 
soil from different depths from plat 210, Truckee-Carson Experiment. 
