CONTENTS 
PAGE 
Ree VMONG@INUER ALTE: vec fog nee wees wg ashe aes bins Sia ee eeeea A 371 
xperments with water cultures... 2.22.00 20. t ee ioe eee 371 
Pxpermentcs with soil cultures... 0.5. ee 374 
Experiments with soil fungi and bacteria......:.............. 377 
STOUTDITDDIA 6 oc. Stet Eee IR a EME Peeper geese eter 378 
ET SECTUDT UGA! WO TS ESS a an ea uc et eee 379 
SC OPEROMORE SENG SUUCYr «fais as ius Savas eles eats aap aah, be ee Ae 379 
Effect of manganese compounds on wheat seedlings grown in 
TENGCI CUUUNG URES ones oe Ste ei eI aR a re Ra ee Ri ear 379 
Effect of manganese compounds on wheat grown in soil........ 383 
Manganese content of yellow leaves......................0... 387 
Relation of manganese to the oxidizing power of soils.......... 388 
SUI OMCOLMANGANCSEs 2 es cl ee ene yee ees 390 
Macanionmbye plant TOOtS sci F hes A eels ee cae eles ae 393 
Effect of manganese sulfate on soil bacteria................... 395 
FMEVMEMT ORO CALTON Gay ole ues as EAL ree tone, Go ane Ul eet ceeeneel aioe 396 
Repcauiitesr GOT ye rs te anne Ch te th eres Se Au ar 397 
SO Grito STOM Spe tari Gh kes, Comite gM Wa Cia yee a sin gan we ct ara 398 
MS TETNGOMOLEC OR So evae SAE he Ee is Nes et OS te aS, oe teat 399 
