CIRCULAR 421, U. S. DEPARTMENT OF AGRICULTURE 





.s g |.s 



II 





za £ 



oo co <N «# to 

 oo t^ »d i-i oo 



OS C5 OS «5 

 i>: ' CM' © CM - 



OOCCH0 9 N00O>ON!DCCCO)N'* 



£ ! 



ooooooo 



Sogooi 



CO OS tC CO Oi 



COP4.-I CM 



«OnON»m«MOMOOOWNOgNM 

 Si •*C»O'*O'<PM'*iON'<tl00(NNNOOCQI 



3 



CO CN i-< <N i-i CS >-l i 



t^.00 



"W 00NM6l0NSopiQOi0ONOi0O'0> 

 e ^NiOOii-lrlrtO>NNlO'*N'0'0'M'V 



§ rjTcs^-T-<-rr-re<rr-rr-rc<f eovfr-r 



oog^oogooooooogoo 

 to co" to eo •<* tjT V t> e<f co" co o? co cm" co i-T 



^»N0005>OOOTl<O!C<CN00C0rtNOINiOlOCS 

 ^NrttONHrtlNCCNOOONHM^COiOOWO 



SoiO!ooifHioeo;»toooaii(iO)iorio« 



§ i-T CO CO i-Tcfi-TrH'i-r.-J' CM"r-T pif *-* COrHCfW 



i2 oo i-i o cm ca co as oo io rt< o >o io -*i —. «c <M ic 



^ooaidMiN'oJc)JN'*oiNMH'tddd«i ' o 



i-l CM nHMCSH 



45 O 00 ■tl O C^ t^ 00 CO i-l "<JI CM iO 00 CM CO < 

 ^ .-I O CO' SO CO' SO <N «d «3 O r-i O CM i-i C5 «* i-i rH O 



42 "* oi -^ co oi to i-i ^ »o cm co to oo t- OS r- »o co 



^HONMiQoiwid^OMi-iNoddNNW'CJQC 



•S »OCM CO CO rt ^rHMHlONiHN 1-H 



I 



42« <N 00 «^l i-H •*■ 00 >0 rHCOtOI 



42-* CM CO CM -V CO t- O ^MINlllOlOiCNtOO 



^i4owT-it^o>o6«dtd©»>05©'*o6oo5aSN** 



s5 COCO ,-HrH(M,-H i-H i-l i-H ?5 



4» O 00 t-h CM O to i-H tO ■"*< OS i-H CM tO »C •«< <N Ol 00 



"S ,*M MHNH^NHH C0lM.-H,-H ,-H 



»S3S5328SScM , 8c38&S8SN.«Seoeo 



