22 



CIRCULAR 912, U. S. DEPARTMENT OF AGRICULTURE 



© X 



fl o 



1— 1 -^ 



tent of 

 win- 

 ter in- 

 jury 2 



c^i^^T^c^^^coco^^c^coc^cocscoc^ccc^coco^-ir-ieoco 



© © 



£ ° 



ting of 

 termi- 

 nal 

 buds J 







i 



rS 



'© 



o 



rH OS 



^ NiOOOMOO i iO to i i to O i CO 



* idri'dicdooio lodd lodeo i« 



Ct, i(N r^ <N CM i (M i- i i i i i i i i i i KMH-: ih 



03 c3 

 ^ °<+h 



^ > iCOCDN^CC'*0 0:»ONCOCCOCOWNO'D©iON»ON^(N 



ttCOffiHMfflOONOOM^OOO^HHOMOlHNCOOMOO 



fe, rH ^H CN TH t-H CM rH (M rHrHrHrH(MN^rH 



"> 



O 



c ^ 



l-t OS 



SJOLO^^fMOiO^OLOOCOOOOOOOCOCO-HOO 



g co i> Ci cr. iCTf i>io o^o 



Oh 



At 10 

 years 

 of age 



gHN^rJt^TfiOLOMtOOiONMHMCOOCT-N'tiOOONC 

 ^O2C01>G5C;cC>tO^C:t^L0C0^(NiO^r^iO^ MCOOC^C^C 

 K i— 1 rH 



At 5 

 years 

 of age 



gWcO^^cOLOCOW'tiCOOCCOCOM'+ONNiOiOOrHOOO 

 WOJNNOSGffliO^CNOOiOOaMHCOONMMCNNO 

 J, ^ r ~ l rH rH rH 



■jig* 



g^H^fflcDfNO-ftCOOHO^-fOOHOCffiOr-CC 

 »05 0>00 05©NNOCT>OOONONOONOOlNCOWON(MO 



rH r^ rH rH H rH rH 



Num- 

 ber 

 planted 



OOOOCOOOC-tNXO^OOOOCOOOCNOOM 



73 

 Ph © 



COH©iOMOCCCCCO^^OOrt-CCCC'+CCCCDii:cCCLO 



rH(MCOCOCO^^N--COCO(M-N-^-r-M--^^COrirHCO 



o3 



- 1 02 H ~ 



2 <u b o 



03 



rn N CO s - CO iMO-tOOCOCD^iOOlNXHTjiCS^IOIN'HCOH/ 

 "tf 1> CO CO CO i N O N O O C N C C -t N CO C N N X rf C N t 



O rf cC 0C CO . h rH WCOCOXCO'tO't^lO-t'tH/N't'>tN 



r- t^ Cr. CT: CT- i r- N r. cr. CT. N ifJ N *tf t^ CM OJ a: 





£ 



PI 

 o 



'-+3 



'3 

 go 



Pinus banksiana 



Pinus contorta var. latifolia 



Pinus edulis 



Pinus flexilis 



Pinus nigra 



Pinus ponderosa 



Do 



Pinus resinosa 



Pinus sylvestris 



Do 



Pinus tabulaeforrnis 



Populus acuminata 



Populus alba var. nivea__ 



Populus angustifolia 



Populus balsamifera 



Do 



Populus berolinensis 



Do 



Populus canadensis var. eugenei _ _ 



Populus candicans 



Populus deltoides 



Do 



Populus generosa 



Populus nigra _ 



Do 



Populus nigra var. betulifolia 



