103 lines
3.5 KiB
Plaintext
103 lines
3.5 KiB
Plaintext
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Chapter 8
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SOILS
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me hear lenlllser ls ure rooms)» ol uro gardenu.
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(chi-roe vartb)
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8 1
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INTRODUCHON
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The propemrs and lreannenrs ol eornrnon soil rypes ln
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speerrrscllrronr areas are summed "I larer thaplcli,
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so do: in Ihls elrsprer we deal snore wuth sod Is a
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malerral, (“flaming some ol rhe ways lo slabrlise and
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sssisr smli in relalnrng [hell produelrvlly lsod
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oorrservalrorr and sod mndihumng)
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Soils dely pmse lmlrneru, as llrerr srruelure land
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pennea yl, organlz eonlenl, gaseous eomponenra
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lsorne derwed lrom llre .rrnospnere, some lrorn pro-
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cesses wnlrln lne sorl, and some exhaled lrorn lne
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seolnrenrs beluw), minerals, pH, and waler (or rallrer
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solrde slams» changes lrorn lroor lo haul wllh sod
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depllr and rrearrnenr, and in response ro mlcro-
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elevanona. Added lo llns is llre Ian llrar many sorls are
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urignufly eornplek snornm derived hum a var-lery at
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lucktypesaxldthaluwynuymvemdavzrykmgmd
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vaned lrlsrory.
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A film lunar Is our dtsplhe all uur knnwledgl. ln
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splle ol soil semees and sail uulytis, and despite lh:
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heel aneanprs ol people to ease lor land, we In losrnn
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lopsoll ar an evrr-incmsmg rare Australia, where l
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live and write, has perhaps 30% ol its ongmal soil n
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lair eondrrron. nre ml are washed at blown away, or
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sadly depleled lr. smut-are and ylelo; ads is me ol
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rnosr eoonlrles ol me world where errraerlve
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:ykulmn and 10m oecurs.
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me closer solls are defined, it seems, llre less lalrely
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we are ro know llreor Nolwirhsnndxng, Ihli specrlre
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nnremlmy, llrese are some sdsralnaple .pproaelres lo
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soll malnoenanee and nasal] .elraoi canon Ills m rnaoe
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areas mar we ml] onrlrne scralegres Keep n mind,
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182
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Imwcvel’, Ihal we are always dalmg a lulu-Ax or
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mauil; mar rs m cor-scan: vananor. in puke and nose.
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Nobody ean b: dagnullt aborn any mlunl sysreor.
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Soil solenee eoneenrrales very much on what .s ”In:
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lelasrrnsauonsl, bu| nol on hour In ruoloe sall Ohm n ls
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len lo anuleurs—yndtnus and lirmers—(o ereale
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good soll by wlhu eon-ml, modest aeralaon, and plan!
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and anima| management. Fannrts and prdmls seem
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lo be so uhen rlre praoleal, Inmvzhvz, rxprnmemzl,
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sueeessldl gmup (wnrle olren xgnomd by araderrd-sl
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rlral l despalr ol esorerle knowledge ever precedlng
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ellrellve arlron. Very lew lanners ean persuade a
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gmp olserenoss oo assess rlrelrspparenrly sneeessinl
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sod rrlala H is pas! orne am we assessed wlrellrer more
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"scum” :5 ml bung done by orndoo. people man by
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scienusrs whu (mm mysom more ollen eolloel llre
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resulrs ol orners mar. g nerare cherr- by eximpl:
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Selenee r; good al exp ng why mlng work, and
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rlnla making skllls luchable, ll rs nor so good ar
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milianng lleld work, or In rrallnns people already In
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rlre neld lo work eflemvdy.
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II as hard may ifsuznhsb lackme mun: lo gel inns
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the real work or 11!th choose sdcm Io eseape lrorn
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field pmhlem! ll u hard on in “14le or esp-ion
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landlords, loreelosnees, paverty, greed, malnumllon,
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and erplolunon, but rlrars where all llre action Is, A
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lield approael. means (hocsmg values, gellmg
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involved wrnr people, 2nd impiring broad reale
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change» Fanners' lreld day: advanee knowledge lar
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more elleenvely rlran scientmt szI", and local
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edneanonal sessrons more lnar. ellhu ol than,
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l-lowever, bolh selennsls and lanners have much lo
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"pm and lake. mssorr oreoalnron .s slowly stifling
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Ia happen as a rewllomlrn conoernon a pnvahe level
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Sorls oar. be xzsmuAl. (mslmg in pleeo ove. the"
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presenl rock) or mmsromn by waler, ,gravrry,
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and wind. ln Iheil lomranorr KM key hero-s are Mk
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lype, elrmave, Ind mpoguphy (or landloonl, me... his
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a lrey role in nxlr bu-kduwn, nomb’inlng will. such
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