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  • soil and water conservation

  • How to Use This PamphletThe secret to successfully earning a merit badge is for you to use both the pamphlet and the suggestions of your counselor.

    Your counselor can be as important to you as a coach is to an athlete. Use all of the resources your counselor can make available to you. This may be the best chance you will have to learn about this particular subject. Make it count.

    If you or your counselor feels that any information in this pamphlet is incorrect, please let us know. Please state your source of information.

    Merit badge pamphlets are reprinted annually and requirements updated regularly. Your suggestions for improvement are welcome.

    Send comments along with a brief statement about yourself to Youth Development, S209 Boy Scouts of America 1325 West Walnut Hill Lane P.O. Box 152079 Irving, TX 75015-2079.

    Who Pays for This Pamphlet?This merit badge pamphlet is one in a series of more than 100 covering all kinds of hobby and career subjects. It is made available for you to buy as a service of the national and local councils, Boy Scouts of America. The costs of the development, writing, and editing of the merit badge pamphlets are paid for by the Boy Scouts of America in order to bring you the best book at a reasonable price.

  • Soil And WAter ConServAtion

    BoY SCoUtS oF AMeriCAMerit BAdGe SerieS

  • 35952ISBN 978-0-8395-3291-02004 Boy Scouts of America2010 Revision of the 2004 Edition

    BANG/Brainerd, MN4-2010/056818

  • Soil And WAter ConServAtion 3

    Requirements1. Dothefollowing:

    a. Tellwhatsoilis.Tellhowitisformed.

    b. Describethreekindsofsoil.Tellhowtheyaredifferent.

    c. Namethethreemainplantnutrientsinfertilesoil.Tellhowtheycanbeputbackwhenusedup.

    2. Dothefollowing:

    a. Definesoilerosion.

    b. Tellwhysoilerosionisimportant.Tellhowitaffectsyou.

    c. Namethreekindsofsoilerosion.Describeeach.

    d. Takepicturesofordrawtwokindsofsoilerosion.

    3. Dothefollowing:

    a. Tellwhatismeantbyconservationpractices.

    b. Describetheeffectofthreekindsoferosion-controlpractices.

    c. Takepicturesofordrawthreekindsoferosion-controlpractices.

    4. Dothefollowing:

    a. Explainwhatawatershedis.

    b. Outlinethesmallestwatershedthatyoucanfindonacontourmap.

    c. Outline,asfarasthemapwillallow,thenextlargerwatershedthatalsohasthesmalleroneinit.

  • 4 Soil And WAter ConServAtion

    d. Explainwhatariverbasinis.Tellwhyallpeoplelivinginariverbasinshouldbeconcernedaboutlandandwateruseinthebasin.

    5. Dothefollowing:

    a. Makeadrawingtoshowthehydrologiccycle.

    b. Demonstrateatleasttwoofthefollowingactionsofwaterinrelationtosoil:percolation,capillaryaction,precipitation,evaporation,transpiration.

    c. Explainhowremovalofvegetationwillaffectthewaywaterrunsoffawatershed.

    d. Tellhowusesofforest,range,andfarmlandaffectusablewatersupply.

    e. Explainhowindustrialuseaffectswatersupply.

    6. Dothefollowing:

    a. Tellwhatismeantbywaterpollution.

    b. Describecommonsourcesofwaterpollutionandexplaintheeffectsofeach.

    c. Tellwhatismeantbyprimarywatertreatment,secondarywastetreatment,andbiochemicaloxygendemand.

    d. Makeadrawingshowingtheprinciplesofcompletewastetreatment.

    7. DoTWOofthefollowing:

    a. Makeatriptotwoofthefollowingplaces.Writeareportofmorethan500wordsaboutthesoilandwaterandenergyconservationpracticesyousaw.

    (1) Anagriculturalexperiment

    (2) Amanagedforestorawoodlot,range,orpasture

    (3) Awildliferefugeorafishorgame managementarea

    (4) Aconservation-managedfarmorranch

    (5) Amanagedwatershed

  • Soil And WAter ConServAtion 5

    (6) Awaste-treatmentplant

    (7) Apublicdrinking-watertreatmentplant

    (8) Anindustrywater-useinstallation

    (9) Adesalinizationplant

    b. Plant100trees,bushes,and/orvinesforagoodpurpose.

    c. Seedanareaofatleastone-fifthacreforsomeworthwhileconservationpurposes,usingsuitablegrassesorlegumesaloneorinamixture.

    d. Studyasoilsurveyreport.Describethethingsinit.Usingtracingpaperandpen,traceoveranyofthesoilmapsandoutlineanareawiththreeormoredifferentkindsofsoil.Listeachkindofsoilbyfullnameandmapsymbol.

    e. Makealistofplacesinyourneighborhood,camps,schoolground,orparkthathaveerosion,sedimentation,orpollutionproblems.Describehowthesecouldbecorrectedthroughindividualorgroupaction.

    f. Carryoutanyothersoilandwaterconservationprojectapprovedbyyourmeritbadgecounselor.

  • Soil And WAter ConServAtion 7

    Contents

    Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

    WhatIsSoil?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

    HowWaterBehaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

    CausesandEffectsofErosion . . . . . . . . . . . . . . . . . . . . . . . 35

    ConservationontheLand. . . . . . . . . . . . . . . . . . . . . . . . . . 45

    ConservationinWatersheds. . . . . . . . . . . . . . . . . . . . . . . . . 53

    WaterPollution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

    ConservationandAgriculture........................79

    HowYouCanHelp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

    Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

  • Soil And WAter ConServAtion 9

    .introduction

    IntroductionOnEarth,alllivingthingshavemovedthroughself-renewinglifecycles,havedependedonairandwater,havegrownanddied.Alltheselife-formsaretiedtogether.Tosurvive,theyallplants,animals,birds,insects,andorganismstoosmalltobeseenwithoutamicroscopeneedair,water,soil,andsunlightinsomeform.

    Alllife-formsarecloselylinkedanddependononeanotherfortheirexistence;thisiscalledthewebofnature.Ifonestrandofthewebisdamagedordestroyed,theotherstrandswillfeeltheresultinsomeway.Ifthewebisstrong,withallpartsworkingwell,awholesomeenvironmentonEarthwillflourishforpeopleandallotherlivingthings.

    IttakestheattentionandhelpofmanypeopletokeepEarthsenvironmentingoodworkingordertosupportitsgrowingpopulation,whichmusthaveair,water,food,clothing,shelter,andlivingspace.

  • 10 Soil And WAter ConServAtion

    introduction.

    our responsibility to learnWeallhaveaplaceinthegreatwebofnatureandshouldbeconcernedaboutwhathappenstothesoil,water,andallthingswecallnatural resources.Weallhaveadutytolearnmoreaboutthenaturalresourcesonwhichourlivesdependsothatwecanhelpmakesurethattheseresourcesareusedintelligentlyandcaredforproperly.

    Conservationisntjusttheresponsibilityofsoilandplantscientists,hydrologists,wildlifemanagers,landowners,andtheforestormineowneralone.Itmustbeyourduty,too.Toenjoywoods,wildlife,andflowers;cleanwater;naturalopenspacesnearourhomes;andagoodfoodsupply,thenyou,too,mustbeaconservationist.

  • Soil And WAter ConServAtion 11

    .introduction

    Tobeanaturalresourceconservationist,youmusthaveagoodknowledgeofthosenaturalresources.TheSoilandWaterConservationmeritbadgewillintroduceyoutothefascinatingworldofsoilandwaterandtotheplantsandanimalsthatshareEarthwithus.Tounderstandsoilandwaterconservationasawhole,wemustfirststudypartsofit.Thisiswhysoilandwaterarediscussedseparatelyfirst,beforetheyareconsideredasaninseparablewhole.Asyoulearnmoreaboutsoilandwaterconservationandcarryoutyourconservationprojects,youwillbegintoseethatitisnearlyimpossibletoseparatesoilandwateraspartsofEarthsnaturalresources.

    AsyoubeginworkonyourSoilandWaterConservationmeritbadge,discusstherequirementswithyourcounselor.Yourcounselorcanhelpyouchooseprojectsthatyoucandoreadilyandfromwhichyoucanlearnthemost,dependingonwhereyoulive.

  • Soil And WAter ConServAtion 13

    .What is Soil?

    WhatIsSoil?Soilisnotliving,butitsupportslife.Wewalk,play,travel,andbuildonit.Youcallitdirtanddontthinkmuchaboutit,butyourlifeandthatofallothercreaturesdependcompletelyontherelativelythinlayerofsoilthathasdevelopedonmostofthelandsurfaceofEarth.Ifyoulookcloselyatsomesoil,youllseemanybitsofrock,mineralcrystals,plantroots,decayedleavesandothermaterials,worms,tinylivinganddeadplantsandanimals,water,andair.Thoughtheproportionsvary,allsoilconsistsofmineralandorganicmatter,water,andair.

    Understandinghowsoilsform,howsoilsdiffer,andhowplantsusesoilwillhelpyoubetterunderstandandappreciatetheimportanceofsoilforlife.

    Physical and Chemical ChangesMostsoilsdevelopedlargelyfromvariouskindsofrocks.Overthousandsofyears,theforcesofnaturesun,wind,rain,frost,glacialice,chemicalandbiologicalreactionsbreakrocksintosmallerandsmallerpieces.Thesunwarmstherockandtherockexpands;atnighttherockcoolsandcontracts.Thisexpan-sionandcontractionopenstinycracksintherock.Moisturefromrainorsnowgetsintothecracksandhelpsforcetherockpiecesfartherapart.Morewaterenterstorepeatthecycle.

    soil. A self-

    renewing

    compound of

    rock and mineral

    particles, organic

    material, living

    organisms, air,

    and moisture.Recognizinghowimportantsoilisinthewebofnature,CharlesE.Kellogg,asoilscientistandchiefoftheSoilSurveyforalmost40years,wrotethatessentially,alllifedependsuponthesoil....Therecanbenolifewithoutsoilandnosoilwithoutlife;theyhaveevolvedtogether.

  • 14 Soil And WAter ConServAtion

    What is Soil?.

    Aftersomepieceshavebrokenofftherock,thewindblowsthem,orrunningwatergrindsthem,againstotherrocks.HugeglaciersthatoncemovedacrossthenorthernUnitedStatestwistedandshiftedandgrounduptremendousquantitiesofrock,greatlychangingthelandscape.

    Chemicalreactionsalsohelpadvancethealterationofrocks.Fallingrainpicksupalittlecarbondioxidefromtheatmospherethat,whenjoinedwithhydrogen,formsaweakacidyetonepowerfulenoughtodissolvecertainmineralsalts.Thesedissolvedsubstancescauseotherchemicalchangestooccurintherocks.

    Soil FormationThecrumblingofrockisaprocessthatleadstosoilformation.Finelygroundorsplinteredrockwillnotbecomesoiluntilitbeginstosurgewithlife.Livingandonce-livingplantsandanimalsorganicmatterhelpgivesoilaphysicalstructurethatadmitsmoistureandairandhelpsthesoilretainthem.Tobeuseful,soilmustkeepitsstructure.

    Natures forces

    slowly crumble

    rocks into mineral

    particles of clay,

    sand, and silt.

    the forces of nature helped shape these rock formations in eastern Utah.

  • Soil And WAter ConServAtion 15

    .What is Soil?

    Asbitsofcrumbledmaterialandmoisturecollectonarock,simpleplantscalledlichensbegintogrow.Aftersometime,water,decayinglichens,andmorebitsofmineralmattercollectintherockcrevices.Soon,microscopicformsofplantandani-mallifebegintomakethecrevicestheirhome.Mossesbegintogrowontherock,andlatertheseedsoflargerplantsgerminateinthislooseearthymaterial;theseweeds,grasses,andotherplantsgrow,die,anddecay,therebysupplyingorganicmatter.

    Theshape,ortopography,ofthelandonwhichsoildevelopshelpsdeterminethesoilsquality.Thetopographysteepnessofslope,directionofslope,elevationdeterminesthepatternsofwatermovementandaccumulationaswellastheamountofthesunsheatthatreachesthesurfaceoftheland.

    Plants are the

    real makers of

    soil. At the same

    time, chemical

    reactions are

    happening, and

    bacteria, fungi,

    worms, tunneling

    and burrowing

    insects, and other

    organisms are

    active. Thus the

    formation of a

    simple soil begins.

    Entirely different

    soils can

    come from the

    same rocks.

    rub two pieces of rough rock together vigorously to get an idea of how long it would take for physical forces to break down rocks into the material from which soil develops. You have to rub a long time to get even a spoonful of tiny particles!

    Tobuildjust1inchofthesurfacesoilcouldtake100years.Inplaceswheretheclimateisdryandcold,aninchofsurfacesoilmightnotdevelopin1,000years.Leftunprotected,thissoilcouldbelostinonerainstorm.Thisiswhyitissoimportanttocareforthesoilwehave.

  • 16 Soil And WAter ConServAtion

    What is Soil?.

    the Many Kinds of SoilSoilscientistshaveidentifiedmorethan70,000kindsofsoilintheUnitedStates.Climate,parentrocks,plantandanimallife,topography,andtimeallaffectthedevelopmentofsoilsandcausesoilstobedifferent.Particularlyimportantistheclimate,especiallytemperatureandtheamountofrainfall.Climatedeterminesnotonlyhowfastandinwhatwayrocksarebrokenintofragments,but,moreimportantly,whatkindsofplantsgrowinaparticularplace.Inturn,thekindofplantsthatgrow,aswellashowfastdeadonesdecay,andthekindandactivityofsoilorganismsdeterminethekindofsoilthatdevelops.

    BylookingatacrosssectionofEarth,wewouldseethattheouterlayerthesoilisverythincomparedwiththediam-eterofthewholeplanet.Soildepthactuallyrangesfrommanyfeet,wherewindandwaterhavedepositedsoilmaterialsovertime,tolessthananinchinplaceswheretheclimateandotherfactorshavehinderedsoildevelopmentorwheresoillosshasoccurredbecauseoferosionornaturaldisasters.

    the Soil ProfileSoilhasthreedimensions.Itisboundedonthetopbythesur-faceoftheland(andsometimesiceorwater),onthebottombyrockmaterial,andonthesidesbyothersoils.Acrosssectionofsoilinanewlycutroadortheexcavationforthebasementofanewbuildingwillshowdefinitelayers.Thissuccessionoflayersfromthesoilsurfacedowntobroken,weatheredrockiscalledasoil profile.Thedifferentlayersareknownashorizons.

    Upper Mantle

    lower Mantle

    D-DoUble-priMe layer

    oUter Core(Molten)

    inner Core(SoliD)

    CrUSt

    0 to 31 MileS250 MileS406 MileS

    1,688 MileS1,806 MileS

    3,219 MileS

    3,981 MileS

    Peat is a kind of

    soil that consists

    almost entirely of

    organic matter.

    You will usually

    find it where

    there were once

    lakes, ponds,

    or marshes.

    Each horizon

    differs in one or

    more properties,

    such as color,

    texture, structure,

    porosity (how

    many pores

    tiny holes that let

    in moisture

    it has), and

    chemical content.

  • Soil And WAter ConServAtion 17

    .What is Soil?

    Thesoilprofilecarriesthesoilshistory.Forinstance,theprofileoftheparticulartypeofsoilthatdevelopsinaforestlooksmuchdifferentfromtheprofileofsoilwhereonlygrassesgreworwheredesertconditionsexist.

    Soillayersdifferinthicknessandincolorsurfacesoilscanbeblackordarkbrown,gray,orred.Organicmatterusuallymakesasoildark.Otherlayersinthesoilprofileusuallyarelighterincolorthanthesurfacesoil.Theircolorsyellow,red,white,ormaybeevensomewhatbluecomefromrockandfromchemicalreactionsthathavehappenedoveralongtime.

    Soilsmaylookthesameonthesurface,theycanbequitedifferentunderneath.Tobetterunderstandthedifferences,lookatseveraldifferentsoilprofilesexposedalongsteeproadbanksorinconstructionexcava-tionsorgradingactivities.ExplainsomeofthethingsyouseeandhavelearnedaboutsoiltootherScouts,yourleaders,friends,orfamilymembers.

    Mostsoilprofilesincludethreemaster horizons.Thetoplayertheoneweusuallythinkofwhenweusethewordsoiliscalledsurface soil.Fromit,manyplantsgetmostofthemoistureandnutrientstheyneedtosurvive.Belowthesurfacesoilisalayercalledsubsoil,andthenanotherlayercalledsoil parent material,whichislargelylooseandpartlydecayedrockthatmightsomedaydevelopintosoil.

    SUrfaCe Soil

    SUbSoil

    beDroCk

    parent Material

    Soil profile

    A soil profile can tell a great deal about the past climate of an area and about the plants that grew there many years ago.

    In some places,

    if the cut for the

    soil profile is deep

    enough, you can

    see solid rock

    called bedrock

    below the soils

    parent material.

  • 18 Soil And WAter ConServAtion

    What is Soil?.

    three Sizes of ParticlesAnothercharacteristicofasoilisthesizeofthesolidparticlesitcontains.Indescribingsoils,thedifferent-sizedparticlesarecalledsand, silt,andclay.

    Takesomesoilbetweenyourfingers.Ifitfeelscoarseandgrittyandyoucanjustbarelyseeindividualparticles,itmustcontainalargeproportionofsandparticlesthatrangefrom0.05to2.0millimeters...

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