Germination of Forest Trees 43 
a higher per cent. in the medium shade, and six a higher per 
cent. in the dense shade than in the other cultures. 
On page 42 are given the germination curves of Pseudotsuga 
taxifolia (Wash.), and Picea sitkensis. Both sets of curves show 
that germination begins sooner, the curve rises more rapidly and 
the final germination per cent. is higher in the case of seeds 
germinated in the shade as compared to light. 
TABLE IV 
Tue Errect or Soil Moisture oN GERMINATION 
Eastern Species 
Dry Soil Medium Wet Soil Wet Soil 
ecies gu l|Uoa aot fa] Tn ess an |Ton as 
aA las eS aR | eA Fe eA laR Ee 
JW GIS SUR OIS Wee deo bea abhor alo obi eed — | — | —] 30 | 34 | 8.0] 22 | 50 | 10.7 
IPGLNS WBCTHUCHUB 56s s0050ccd00ea0% AG) | BA | TOO} 1A |) GO 1 FH) Ba Ba | S405 
IPOS GeaCHUCOH® (V8 Sh) 50000000000 BX | ral Fos 223 |) 3 | ALO) ial |) BO) |) BonS; 
IRAWUS GESUIOSE Rs A eh aie acon isan aveiaatie te 68 — | 2.5) 24 | 40 | 40.0) 24 || 16 | 30.5 
2U USD QUUSETES ty ete En heise tes | — | — | — | 36 | 50 6.0} 31 | 53 | 10.5 
UPC USEEC CDG) yor Ao cays Ruteisie lees ear criel oi: SN icy 6 | 19.0 
INES WONSHUMADBs 66.5 obo 66086 ooo eo — | — | —| 22 | 22 | 12.0] 18 | 30 | II.o 
(CONMDD, SVACIOSWs 45550000000 KG 008 — | — | — | — | — | — | 18 I I.0 
Catalpa speciosa (Neb.)........... ——) | —— | | 22 6 | 4.0] 16 | 12 | 91.0 
OWEy, GUSSET ULC. Oe or a ee on eee — | — | — | — | — | — } 4o | 28 | 28.0 
Robinia pseudacacia.............. 1) | SO-| weno & | se. |aexol) 13 ae Paes 
LEAH: WOM Gln e oeonsaceonocone — 34 it |, LO 
EMCEE. PVT TOTE SOOO Ge ee a hee 24 LT!) 3.0) 24 || 26 |'12.0) 18 | 30 | 17.0 
Tables IV, V, and VI consider the same species as the three 
preceding tables from the standpoint of soil moisture instead of 
light. 
In Table IV in practically every case where a comparison is 
possible germination started in the wet soil culture, and was de- 
layed as the soil moisture content was reduced. Also the germi- 
nation period is shortened with decrease in soil moisture. The 
final germination per cent. in every case but one was highest in 
the wet soil. Pinus resinosa showed the highest per cent. in the 
medium wet soil. 
This table separates the species into classes based upon their 
ability to germinate in dry soil, medium wet soil, or wet soil. 
