WNIVeRSILY SIrUDIES 
VoL. XVI JANUARY-APRIL 10916 NOS ie 
T—ECOLOGICAL INVESTIGATIONS UPON THE 
GERMINATION AND EARLY GROWTH 
Ono LOR St kisi 
BY RICHARD H. BOERKER 
CONTENTS 
PacE 
JES aren HONe Ye INOUE 5 Shai es Gib see etna suscelec coneites ces Orato Te ce oaeyrpich bia ERI Rene canner I 
IPreliinammamy ComenGlkarennoms “oascascdsuecccusdoodoudocusouseodnbacncet WI 
USES Govt Coulltyaaeapae ec cersich ncn Atnarats Cresent Oats eve eptinner cy a Gaul Arasrh Sap mcitepen st aahe nice tots 7 
Classinicaiion ame IReswiamé oie Ielelouiane [CHOIRS sooooscgooussaduusede II 
Ainer GerminaommsroOCeSSirs cermin sok tenic ca coca mae meena mince ts 15 
Mieiaod of Attacking Iiroplem ae Isle! 5occ0ccb0ndeonecscnsoac 708 19 
Metaods amel Appareils WSCC sonnenscoccnn0sd0cdcvsadacconsanesGN 21 
Wine Comiroll Ou Islan IPACWORS ocoococdoagscnscccaoauocovenKba06 24 
IN@WES. Chale Devenyonbavemvonncen eye nes 6 erties eicniclole Catlcle) aie ec\reneiia cieien cn wegen Peace 32 
The Effect of Habitat Factors upon Germination ..................-- 34 
The Effect of Habitat Factors upon Stem and Root Development .... . 64 
The Relation of Size and Weight of Seed to Germination Per Cent. 
ayanGl Beielhy -1Deyeleyorsneiols sya geile Udo oaks ood a ecmmemoncad > aatoe 70 
Sunamaray Oi) Conclusions, oasdeecouont cosmos ooene en coos aE oes asa oo 82 
A Lo Salechs DMV AMER TRE A oe cyte) Ged cu cntncldie Ghee ctalcal abctsSrateue lapstete Ceares cet lads 88 
PREFATORY NOTE 
Almost every national industry makes provision for investiga- 
tive work. Millions of dollars are spent annually to develop both 
human and mechanical efficiency. It is immaterial whether the 
investigations are for the purpose of utilizing certain products 
hitherto considered waste, or to make workmen more efficient, 
or to employ the latest processes and inventions to better survive 
in the competitive struggle—the results of this class of work are 
I 
