101 lines
3.4 KiB
Plaintext
101 lines
3.4 KiB
Plaintext
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Chapter 9
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EARTHWORKING
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AND EARTH RESOURCES
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Moving pi uie emi-i hnnga Ml’ml and {em
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Men ieelwu Whal ii did and menni
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aui uepidaiion oi me epneree
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muuyi genie: {an is Innocent
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Uplin annel
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And did me euiui move roi you?
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91
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INTRODUCTION
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Few pajpk |oday inuek amuiid m eanli, and whm an
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inieinaiional Him, I uiien llnd I have inc unly
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deeenily diny lineeniaile
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Fur ine soil seiemiei, soll has endless ciasaiiieaiiuna,
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(o engineers, ii is d maienaii lo peiiieis, ineir basu
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iesuuiee; and lo nausekeepeis, lmlpnnls on ilie llodi,
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in pan uf ilie eienial dim However we look npun
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euein, we will all ieiuin in ii. and lieip eieaie ilie soils
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our IMQSWIS nude, niined, ui (in-in pan ui ciiuiaie,
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mam, znllmls, and soil aie iniinuiely canneaed.
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and each will have inlluenees on the aim. ii 11 a gut
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enuieci, like iliai oi waiei, and lhls enupiei will
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muceuiiaie moieon in use in menial design iiian on
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nus as a mowing medium
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People, and pinei aiuinal species, have mined soils
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and eaiili deposfls [or speciiic iaiiii ieeuuiees since
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iiieii incepim, examples aie a iiul "ligation: lo 53“
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“ch, and speeilie dushng sues in whlch eiiiii md
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mammls ml) in bath! k: nd iiuinselyee ui parasites
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reople have used ica miueiale Lubsldnn, enen,
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chaicedunyl as lonls, and have ground iicm nxldrs iii
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gnipliiies as pipinenie (oi inauy \housands ol yeais
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Sells neii in Hull oxldzs nave lung been mixed wiin
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amm meals m in ilie blHer iannins as insaluble I2m(
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iannnies 1"blark” bieadsl, Dl’ lo Supply mie up
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eieinenis ui KM diet
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nieie aie sevenil clays iiiliie, niieliiie, kaolin, ienpui
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and: ”red“ ciaysl iiaiiiiionully used by tribal and
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modern peopla iu lbsmb poisuus (lidin Sullmml nip,
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yams), id ieduie diai-iiipea and digesnvr upsets, iii |o
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ielieve leelings ol nausea ikaulin day). Nth-ugh liiue
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woik liai been cnmed on! on inis lncipi, we shm-ld
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mid all uses when $pmh< (lays aie mused, and MM
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iney aie combined wiin ipeeilic iood iii «duct or
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eliminnie Poxscncus oi unpalmule minis lmm lddds
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sdine eanhs my be emu! |o supply nace eiemeiiie, as
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clay and clay—salt licks aie (ammonly vuiied by deer,
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kangpipe, caiile, and anielope Farm—calm; [seeping/D
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)5 a mdespl-ud and seemingly mlunl mil olciuldieii
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and mini peuples As well as days, inc whilri
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iiuneiaiaidi asn ul (Res is Widely used as a mod dip a|
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campliies by Aush‘allan Abo nei kamg loud in
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clay is pimieni Xhmughaul iiie wmld
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Eanhworkmg loi agnculniie and monumenis has
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eiiieied iiii ai leasi mm yeais. Mineml smelung,
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poiieiiy, and peel pi cm) ininuig loi liiels ineieused iiie
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scope of eaiiliwoike, iinci inu was quickly lolliiwed by
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iiie deyelupmeni ul large mac ' eiy iuiendad iii
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iemcve mi ainuunis ul pies and iueis ici modem
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luduslry, which laiiili quickly lium I800 on, so iiui iiie
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laii me years 0! our ekiiience has seen ine gienesi
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dwelupmzm of eaflhworkmg and mining,
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The (vmlel use at selfrmnsporting munines ieally
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dalu iiuin iiie poskwar yells now and pni, lnlluwlng
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ilie waniine developmenl ol iiacked iauks, eaiin
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umps used iui aiiiield msmlmun, and large piieu.
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inane iyies lei 1M; iype ui equipmeni wnile civil
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engineers have |o some ekieni kepi pace wiili (has!
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develppinenis, iieiiiiei ilie public at III-5e npi iiiiase in
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anhiiecniial oi nsncuhuml fields have inily ieilued
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ilie poieniiul ul caiiiiwoikinp iiiaeiiuies iii ilie mpdem
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sense
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mi pcwei iii move me eaun wiin mndein mirhines
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Is now almnsl unliiniied, we can, it we wuii, mix new
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127
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