128. 



3.. Forest *=md Soil Physics. 



The forent ns a tall shelter protects the soil against 

 sun, wind and r*.in; against rn.pid changes in temperature, ana 



2} The forest effects the entrance of water into the 

 soil, water contents, and percolation, *nd therefore it affects le 

 solution of ealts and the movement of those salts. 



^} TV,- for^ft protects t: a ~ir in the forest. It shades 

 it, and modofiee i -' nt > r * nd "umidity, ana tins 



reacts u^on tr.e soil. 



forest evapo* I trennpir-- l".rse amounts of 

 wp; reduce* so ture* but it nlao cools the M air 



ant ' ' d 



51 The for I s organic matter which may ce worked 

 ov-- into mulch ind cover to soil, ond thereby aids in its protection 

 inrt evV .-ion nnd in maintaining its rnellownese and permeability. 



forr^t furniehea materipl for humus, vfcich aifectg 



th ng cnpncity of the soil, both in regard to hygroscopic 



?l!^ry wn tcr. 



7> ?orrnt rootr^ prrrr.-epte the roil nt various depths; ge- 

 they till the noil deeper than is the c*ee in ^rftculture. 



e i* ?)'- for^Bt a* t^ll shelter: t*;e forest air is shadec 

 Bll . terially affecting plant and animal M th 



-.ntoriPlly Tflodafied. A -wind 



- 



plsn t., 



tree, 



V Summer mins do not ntrilcn Die ground, hut the trees 

 .refSre^ greater portion of the precipitation comes in th 

 /dr4in;:s from the foliage Heavy raine tena to har 

 '. -.* o-r tl c^ ^I'.en evppor f! o, oo. .- -s mucn as AU 



7" -iior^e: this seeming loee a<Jd fi to tlin humiflity * t ^.^ Bt 



, Hiep/thft "tree-, flomp. wid le^ ? en the tmnanirntion, ana this in 

 turn reacts on the soil. 



4) The Profit is less deep in/ the fore^. -his *tt**** 

 M..1 nd slant life and especially the entrance rind movements of wat 

 In tho w?l! S ii &ortt in regard to s,rin,r thawe. open lanas have 

 flood ' frozen -ro;.n . 



,~ f tflBmePa ture of Oil is mor" uniform, r.no. generally lowei 



ir er in^the forest, th< thout the forest. Therefore all P'ocee 



I 



