140 lines
4.5 KiB
Plaintext
140 lines
4.5 KiB
Plaintext
ptuttestteet |ayer30rm below the surtaeedt garners.
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tn suits that heeotne waterlogged, we ran reset! to
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raised beds or deep dratns tu reduee r ttrated water
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bulld-np, or plant trees to keq) aetrye transpirattarr
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gurng and so reduee salt water tables and Vehnmldlr’y
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the arr
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Two taeturs at least alien sell wa|er avattatatttty-
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. The strength at moteeutar pondtng et water |u
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partretes tn the sort tranre bondst Planl rout narrs
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eannot remote thts pound-water at pmsum above ts
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atmospheres
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- The salt edntertt ot the water Tm many salts, and
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the 50' water exerts reverse nsmollc pressures ml plant
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mots, and will take Mam horn the roots,
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811
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GASEDUS CONTENT AND
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PROCESSES IN SOIL
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So are penneated, wnm not watertagged, by the
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gaseaus eornpdnens u! the atmosphere tsawt nttmgrert
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mt oxygenl. Thrs enters the sort vta pore spares,
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Hacks, and antrrrat burrows, and dtttttses yta pore
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spaces to plant roots The enrhange ol gases, .trna.
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sphere ttr sort and sort to ammsphenhlhz breathing ot
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unhils aehteyed try a set 0! physreal and brotogreat
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pmcuses, some otw eh are
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- EARTH TKDES. The moon ttdes, rnueh subdued on
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eontrnentat masses. neyerthetess attest greundwaters
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tn eotrtrtes ur boulders, the earth ttselt labour zs em use
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and tall aeross the eonnnetttal USN, and ot eourse the
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sorts tat estuattes and mud ttats twhere atr ean tse seer.
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lsutshttng up tor hours as the min nsest
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Ever/what, low at htgh pressure eellsand mrbulem
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wmd new creates atr pressure dttterenttats that draw
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out or Inyed atr \‘la ereyrees and trssures, or bumws
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These same etterts a or retard the dtttuston or
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water yapaur icwss sell surtates, and rust as the wtnd
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dru- out audaee snlls so u aka, by last new, draws out
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other gases tram sort The gases at wil res ‘ than
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trartrerrr dtdxtdet, uxldilion, aerotne and anaerohte
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rtwtapotte preeesses, radon hum radroaettye deny, and
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simple or complex hydmoaxbuns trorn earth depostts
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or humus deeay pass to an
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Mudl at the ammonta and carbon dloxlde tn the
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atmosphere, and at least we at the methane, is
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supplted by sot]
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. ptoLoctcAL EXCHANGE A stngle large
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broadleal tree, amyely teansptrlng. may rnerease the
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area ot tramptratron ot orre aere at start by a laclor ot
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tony, a torest may do su by hundrrd) ot ttmes. 5o
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oxygen, eartran xidc, water vapunx, metallte
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yapaurs, :mn'wnll, and hydrogen or ehlortne 332: are
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transpired by algae, rushes. erops, trees, and hubs or
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mm mm groups yary mendously tn the volume
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ardeornposttran at gases transptred, Although we owe
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trtueh atottr aernospherte oxygtn to uees,a gmt many
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Mil-woody plant speetrs eorrsume more oxygen than
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204
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they prudure.
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Thus, the plant rs a gaseous translator, tradtng both
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ways wtth arr and sort game speethes ttt thr trade are
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gtvert tn the seettrtn below an oxvgznruhvlene
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pluczsscs
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Annuals, km, are yery aetne tn upemng up sorts
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wtth small ur large hurnrws, these at as pump ptstons
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{Ilka a tram tn a tunnett |u draw In and exhaust txtth
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thetr waste gases and atmospnme gaseous elements,
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whreh are then drttttsed ta mnk tta sol! pores Marty
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out-rowers «ants, crabs. terrnrtes, pratrra dogs. wttrms,
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land eraytrsht rarse trp mounds rtr Chlmncys whteh
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then act as ntdt mm tnratr ttttw ttr ttt ereats- pwssure
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dtllarenttals whlch draw arr acllvzlv thrnugh thetr
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nurrows Or they (led large surtaee struetures rtt
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penneatrte sedtmerrts aerttss whteh waste gases dttluse
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leg tenrttte moundst. fly a great many wdt dettees,
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ann-ttals eentt-tve In true tn aerated er atmtndrttoned
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undergmunds, and tnerease gaseous exchange tn the
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Salk.
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FIG"!!! I 5
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lel WEE DONSWUCVED av A LAND auxanwm
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All Haw trntttnes sorrow and "mum waste gases
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GAst MANUFAUURED IN sons
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By way tat tttanrum ar ruttte mm, amenrrnta ts
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manutaetured tn sands tr. the presente ot sunttght By
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way at teemus imn, ethylene tcyttyt ts mantrtaatured
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tn anaerotatc srnt mternsrtes tn anaemhre sruls and
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waters, esrtson drprtde, methane, sutptturetted
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hydrogen. ethylene. and sulphur dturtde are termed.
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and eseape ta arr as tnogas or marsh gas The same
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products are present tn the muted sotts ot
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hydrophobtt elays tn winter, soils where Numb
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stauemre has been destroyed by mtsttse. where salt has
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dzflocnlhlzd clays and eaused sttrt rattapse, or where
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water penedreally floods the sort Many at [hm gaats
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are totrnd as a result at humus decay and thtuhaetlltts
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tsutphur paeteetat action
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Ammoma is released tram aetryety nudutattng
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legumes thees and turost. and ts used in unptaughed
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sorts as a plant nutetent.1hus.gaseons mmponnds are
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eonttnually made tn the sotl ttselt by proeess ot
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autumn: growth and deeay tn the presenee at metattre
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