CONTENTS 
PAGE 
« LSINCERL GB! (REALS OSS Ae ee ee ee cee eel nee 319 
Importance of the carbon dioxide in the soil.................. 319 
Factors affecting the amount of carbon dioxide in the soil air.... 321 
SMO AMISING sh pos Hee Mee we eneeriirnne ate came 321 
OMEGA ONS sy srsees Hats sis eames ar can ah ne bac Eee 321 
SE TSOMAIECOMGIIOMS ms aun ee Neal Toa gt ioe eo 1, 321 
"TUNEYS) GHRGYD ISR eg NINN ae Rr: COE ae eer aen a22, 
Wiremaile Asia ChOESa\ yo re ame ee terete Ne oe a hs 323 
*S TOMO ENTE glee Re Re mt a ps ce ate 323 
SSRIS LL ype eet ca eal TO ANRC on a 324 
‘ EDEJOSTFIA CAST J LS me ae a Sage 0 re RP ne 324 
Re stiltisper: Sis. da eile ocr ee Si wipibean ta oma a grape Wee ew OU IGS Ve 328 
We CiOl CEOP). cee. woe sts ED cere sn ate sd Cope eee 328 
Carbon-dioxide and water relationships............... 331 
_ Effect of temperature and atmospheric pressure. ...... 335 
SMA Ole XPCTIMEeMb. [es M5 PIs rhe ae 2 gd eke a es 337 
Rima MILNE Lhe ieee ees s Meek en wine cris te ean Th gee aie 337 
TERS, ty Seatac AAT Sr SO cal eee Ey eh ager aaa ira 339 
SMH ALVA Ol <EXPCTIMCNt, 2).05%5 0 sa hares foe ieee a ance 8 344 
ESTO SIM WON SIONG. Bot gee ee Roe eRe nein Ni ei Se A a ee men an 344 
{ECE a PS Se A ae Dac eC oeeeeane NScieereh  ER A 345 
Summary of experiment 3........ AS Se CM fate, MEL ap REN 347 
EUG] SIOUEDIRTI TEN a ieee ian ak aes rem nC rt ee meal ed a Aa 347 
ESD CsLSPR Oa Ts, 5 RO Se cee Ee nay te Leta aR ere ee 349 
Peopenoixn(convaming tables). 02.0 eg ee ae AEE 353 
315 
