122, 



;-:o:.l thru is poor in its physics is apt to get poor in its 

 che; - : ;. one :,h'\t is poor on its chemistry is poor in ite physics 

 and io hnrci to mnk'.> r:ood. 



cK Ability of forestur to remedy soil tiia.tia chemically poor. 



The forester does not fertilize or do anything with the che- 

 mic^l concition of the soil ,-: n .ral tiling. He affects the physical 

 condition; he .keeps a good stanu of timber and humus, ana thiM results 

 also in _cai condition, besiucs proviuin^ pro uoc Lion to 



. and soil oovc . . 



/: natural be I mt oi c . and ^oil by protection, increas- 

 ing -nipility of timber, , ,..., ..udei^i-ov/t^, resulting in the so- 

 called "C1.L orcat . 



. d by soil a. ^.nd plants. 



e :"ollov_ .. ;ur* ftrti ^iven for northern countries (Not 



the trox i c : 



O.v j-jiniiii'ajfl for upel'ajL agriculture. 



. . " " ; Oil " 



Ich are wet, c^n uu witli leba A; such are Hawaii, 

 the , udii, and ^JLC ^0^1.. cm r*, of 



1,- is alkali lands. 



iO'jpliorio aciu: minimum lor j0a results 



..1 ,. nitrogen: minimum for good farming. 



: rjaxi;:iuw , rich. 



0.1 ; iirne: ininimmu for sandy land. 



0. : clay 



f. /ffects of alts on :,oil. \v7aat do the salt a do fot the soil 



Lime- c-..rooriai*c it- -"h..".uiiy uiaGolveu by wiiter cont4ining ^1/2, and 

 Is readily distributee: thru the soil. Lime produces floccula- 

 tion of ,1 bo tii produces and assists in tlie conuition of tilth., 



.ice. In dry lands it also acta as a cement to hold the 



particles together. It helps to form crumbs of soil, making larger open- 



ings and helping the movements of wvter .in a nir. It makes the soil mellow 



PS aeration anil water movement. About 2, of lime is sufficient for th< 



9 O x 1 . 



riiicrl lime helps to maintain the neutrality of soil by binding 

 the acicia which form in the soil; it uelps bacterial life ana the devel- 

 opment of hurr.us. It is a necessary ingredient of soil with direct nitro- 

 ring by bacteria; this is rlso true of tubercle bacteria. Otlier- 

 v/ise t'nerc v;oulc. be no ^ork. It helps to make plant food available, espe- 

 1 ly if: i to pctPs>: and phucphoric acid, it offsets the injurious 

 effects of r.n^nesia anu. the aiAiilios; g>peur. iy ruuch usea in this respecl 



;j: j ;;i; .ount of l,i:;.e for ^ood effect ie 8/. ; above this point lime 

 itself beco;r,efj injurious to the soil. 



nesia is one of our import'int incredients in Uie soil; it is 

 more i.op- in the eastern United States than in the v/est. It acts in 

 the soil as lirce d.)o, in looner.i/i.^ it for air and water. It enters as 



