The forcf-t regulateo the aor;...tio;i of lands. There is ;nore GU2 in 

 the ^ir of forert soils than in the air cf open or br.re lands. The 

 follcvan; table l:)e number of cubic feet of c?>r-on dioxide in 

 1000 cubic feet cf air in soil in Lhe first $Q n of soil for spruce woods 

 of 2^ t 60, and 120 . respectively, and in bare land: 



. co*.if..rs; 

 y. 1 / Ctt.ft.G p v iw^o cu.ft. air. 



cu.ft.Cv>2 per 1000 cu.ft. air. 



The Fiitiyun >IA Uae soil air is in a certain pro- 



port Lor, to i .* less itaj^am anu others have called 



atti--.- to 1 vuwoodQ )iave more fertile land ^&4^fclyc 



ir ti( . ;iiore; Uiis aeration is better under hard- 



woods than un-.' : % ruce , KinuL- of land, iro&ac'ly much of this 



cor) tent ion ia tr .--.. cunt of soil life depends closely on the amount 



_e. ire of coil in tilth. 



..^.v^iiiii soil from puddlin ( ; r?nd frum pounding by 



. jcion of the mulch ia not to <**&& 



: - i;">; -y* condi tion I* a ciean*cuc forest vvjiere the 



. .* .. jet is iroPai on ciay wian on sand. Prairie 



. .in tiiwh li^.u tlia forest. 



. 



ri.. Vue -production of or^iiiic Material by the forest in usually 

 oi t-.. of salta *ii.ic>i the forest must take 



fro 



^e I : oc'U produced 



-jecji : >'>00# wo co : Spruce outgrew 



.;ruce r 65 i pine nd beech. 



; 



It uao often been buggested that site be clppsifind by the amount 



II or^nic matter produced by the forest: 

 Conifers: 



line twigs produce 25~3^/ or -^-1/3 of totfi. 



ood H 75 



rd woods: 



and t^igs over -nore thnn 



l(Rr5 thn 5' 



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