147 lines
5.6 KiB
Plaintext
147 lines
5.6 KiB
Plaintext
on riie inieiaeiions berween lire bniad ionsiionai ymups
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oi organisms, or a slzhfand eominuniry i-ieie, be
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iarnenrs, "we knuw so lurle aboui so mueii
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large animals iearibwoi-rns io wombaisl ean ereaie
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mayor enanges in soils locally, by burrowing, soil
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rurnover, iaeeai piodueiion irom Vegelihan, wasie
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produeis. and even alieraiions lo ioiesi sueeessrons
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ailer iire in general, ginss disiurbanres by rolonies oi
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larger iauna as in desens iwlrere iodeni biomass ean
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reaeli moo-lama kg/hi) siriii lire balanee iiom soil
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lung. in baeieiia
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We can irrinlr oi lire soil bioia as a reserye oi oiner-
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rnise easily leaened nuinoiiis lniiiogen, sulpruiii, ooiii
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oi wiiieii elemeurs iney gariiei. sioie, or (omenlmie
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T r ryeie oi liie and deaiii. wiiirii in mm depends on
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soil iemperaiure and season, u‘lcases small or large
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amounis oi iliese esseniial elemenis ai rnuliiple
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mreiosiies 1ermries. in addiiion, may sioir eaieium
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irom subsoils in riieir monnds. and barieria sroie a
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number oi soil minerals, These are iieid in iire mobile
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living resents oi iiie soil bioia, and are released by
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ineir dearln ior sioa upiaiie by planr rooi associaies
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Many planr iorrns direeily eai baeieda ialgae in warer,
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iungii or inseeis and nemaiodes, so iiiai planis are
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earner direei piadaiois oi irie soil iauni, or seayengers
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oi "14 bodies oi no soil organisms
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A useiul elassiiiearion oi soil bioia based on size is as
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ioilowsi New sererrirsi, boo 'az
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. MICROFLORA and Mlckonum; size range
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I—IW miliimieions, e g. baeieria, iungi, aemaiodes.
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pioiosoa, roiiieis
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. MESOFAUNA sieeiange loll mllllmimnklmm,
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e.g miles, springlaiis, small myriapods. onenyiiaeid
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worms, iaise srorpions, ienniies,
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. MACROFAUNA- siee range Ho mm, e g
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woodeiiee. iraiirssirnan, ampiiipods, eeniipedes,
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millipedes. eariirwoiins, beeiles, spiders. slugs. snails.
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anis, large rnynapods
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- MEGAFAUNA sise range zu min upwards. e, g
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mrkeis, moles. iodenis, wombais. rabbiis. ere
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in ierrns oi sneer numbers per squire meiee,
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ireinaiodes iizii millionl, miles “00,000), spnngraiis
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145.com, eueiiyiraeid woi-ms izuoiiiil, and molluses
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liaimm grearly our—number any oiiier species in
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remperare grasslands Fungi, iioweyei. may be 597a oi
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iiie roial liiiiog biomass
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wniie iiie iiadiiion oi soil science has been re near
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and analyse soils as mineral rnairei iiire iiying
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eomponenr belngtirbcmsed or burni oil in analyses as
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~c~ oi numus eonienri, lire pieoeeuparion oi sound
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iarrners, biodynamie groups, mnkh gardeners, and
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“no—d g ' cioppers iias been me nuanriiy arid ouaiiiy oi
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soil liie. born as indiralois oi soil liealiir and as oeiaiors
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and eondiiioaers oi soil Anoiiier iaeior wnieii deserves
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more irearmeni in seienee is rbe mass, dis urion,
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migraiion, and iiineiion oi mois and roor assneiaies,
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and rise role oi burrowers inoi only unliwar‘ms, our
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larger mammals, repiiles. and a boar oi inseeisl
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Tire so i noi sierilised, overwmked, or sprayed
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inio liielessriessl is a (umpllx oi mineral and aciiye
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biologieal maierials in proeess. No soil seieniisi myseii,
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l rely on soil live and lie irealiir oi planrs io indieare
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problems Diseases and psi inupoons ran be rbe way
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we are alaried io sueii problems as nvtrsgnlmg,
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erosion, and mineral deiieieney. Remoying iiie esi
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rnay noi sure riie underlying problem oi suseeprioiiuy
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Ceriainly, sriong planrs resisi mosi normal levels oi
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inseerariaek.
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Soil analysis, irielpiui iiiougir ii is, an neip us very
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lurie wiiii soil processes Unlll yery reeeni years. we
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iraye underesiimared rile eoniiibunon oi nirrogen by
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legumes or soil mieroiauiia in adduion. iiie measures
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oi soil (albon nas rarely been reiared ro mo soil bioia.
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whose iiyes and lulldwns are noi iully known. ii
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seems Cunaus ilrar we know so murii aboui siieep, so
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liiile abour inose animals wiiieri ouiweigii mm per
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neoare by laciois oi ien or a hundred rims. and riiai
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we do noi inyesrigaie rhese rnaiiers iae more seriously.
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Our mosi susrainable yields may be grubs or
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eaieipiiiars iarber iban sireep, we ean eonyeri inese
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inyeriebrares ro use by ieeding iaem io pouliry or iisii
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We ain‘t go wrong in mouragsng a eomplex oi liie in
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soils, iiom ioois and mycorrhln lo moles and
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unhworms, and m ininiung oi ways in wiiieii soil liie
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assisisus io produce erop, ii uselibeeoruesa rrop,
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EAR’I‘HWORMS
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Worms hav: played a more impnnanr pan in
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me i-ilaiory oi me world iiian mosi persons
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would ar ilrsi suppose iu almosi all iiumid
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eouniries riiey are exiiaordiriariiy numerous.
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and lor loeir sire possess greni muscular
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power in many pans or England a wewu oi
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more uian ren Ions Home by oi dry eaeil-i
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annually passes lhmugh riieir bodies and is
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brought io nie euiiaee on each aere oi land: so
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ii-iar riie whole superficial bed oi vegeiable
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mould passes lhrough inelr bodies iii rrie
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course oreiieiy rein years... virus are panieles
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oi eann. rormirig lire supeeneiai mould. are
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subieored ro ooridliione enunerrily iayounbie
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ioe meir demmposlrion ai-rd dislnleyalmn..
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-nre plnugh is one oi uie rnoar arioieni and
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moss valuable oi mn‘s invenrlons, bur long
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beiore ire eidaied nie land was in iaor regulariy
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piougned, and siiil eoniinuea la be iiius
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ploughed by earuiwuru-is ir may be doubled
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wiieriier mere are many ouier animals wiiieii
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have played so lmparlalll a pan in me liisiory
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oi rne world. as have riieee luwly organised
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ereaiuies.
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icbailes Darwin, rbr rniirraiiun oi Vtxcllble
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Mould Through uremia" oi Worms, lsalr
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me ibe iiiue oi Darwin land probably long beiornl,
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(uplous worm liie in soils has been raken as a irealilry
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sign, and indeed more modern ieyiews iiaye noi
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reversed iliis beliei lSaicbeli, I934). Wonns rapidly and
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eiiiereiirly reeyele riianuie and leaves io ibe soil, iieep
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207
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