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MessagePosté le: Dim 25 Sep - 14:10 (2016)    Sujet du message: Drip Irrigation Advantages Pdf Free Répondre en citant




Drip Irrigation Advantages Pdf Free > bit.ly/2dturhm















































Drip Irrigation Advantages Pdf Free

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Drip...irrigation...may...also...use...devices...called...micro-spray...heads,...which...spray...water...in...a...small...area,...instead...of...dripping...emitters....This...is...not...true....(April.2014).(Learn.how.and.when.to.remove.this.template.message)...Modern.drip.irrigation.has.arguably.become.the.world's.most.valued.innovation.in.agriculture.since.the.invention.of.the.impact.sprinkler.in.the.1930s,.which.offered.the.first.practical.alternative.to.surface.irrigation..6.1.1...Suitable...crops...6.1.2...Suitable...slopes...6.1.3...Suitable...soils...6.1.4...Suitable...irrigation...water.......These..are..generally..used..on..tree..and..vine..crops..with..wider..root..zones...On.the.other.hand,.drip.irrigation.avoids.the.high.capillary.potential.of.traditional.surface-applied.irrigation,.which.can.draw.salt.deposits.up.from.deposits.below..This..may..lead..to..the..farmer..either..applying..too..much..water..(low..efficiency)..or..an..insufficient..amount..of..water,..this..is..particularly..common..for..those..with..less..experience..with..drip..irrigation...The...disadvantages...of...drip...irrigation...are:....Pump..or..pressurized..water..source..Water..filter(s)..or..filtration..systems:..sand..separator,..Fertigation..systems..(Venturi..injector)..and..chemigation..equipment..(optional)..Backwash..controller..(Backflow..prevention..device)..Pressure..Control..Valve..(pressure..regulator)..Main..line..(larger..diameter..pipe..and..pipe..fittings)..Hand-operated,..electronic,..or..hydraulic..control..valves..and..safety..valves..Smaller..diameter..polytube..(often..referred..to..as.."laterals")..Poly..fittings..and..accessories..(to..make..connections)..Emitting..devices..at..plants..(emitter..or..dripper,..micro..spray..head,..inline..dripper..or..inline..driptube).....

The.basis.of.design.is.to.produce.an.emitter.which.will.provide.a.specified.constant.discharge.which.does.not.vary.much.with.pressure.changes,.and.does.not.block.easily..Thus..it..is..essential..for..irrigation..water..to..be..free..of..sediments...Pulsed..irrigation..is..sometimes..used..to..decrease..the..amount..of..water..delivered..to..the..plant..at..any..one..time,..thus..reducing..runoff..or..deep..percolation...Water...is...applied...close...to...plants...so...that...only...part...of...the...soil...in...which...the...roots...grow...is...wetted...(Figure...60),...unlike...surface...and...sprinkler...irrigation,...which...involves...wetting...the...whole...soil...profile....With..many..types..of..plastic,..when..the..sun..degrades..the..plastic,..causing..it..to..become..brittle,..the..estrogenic..chemicals..(that..is,..chemicals..replicating..female..hormones)..which..would..cause..the..plastic..to..retain..flexibility..have..been..released..into..the..surrounding..environment.)[7]..If..the..water..is..not..properly..filtered..and..the..equipment..not..properly..maintained,..it..can..result..in..clogging...An.emitting.pipe.is.a.type.of.drip.irrigation.tubing.with.emitters.pre-installed.at.the.factory.with.specific.distance.and.flow.per.hour.as.per.crop.distance..6.1..When..to..Use..Drip..Irrigation..6.2..Drip..System..Layout..6.3..Operating..Drip..Systems..6.1..When..to..Use..Drip..Irrigation.....Finally,...in...regions...where...water...supplies...are...severely...limited,...there...may...be...no...actual...water...savings,...but...rather...simply...an...increase...in...production...while...using...the...same...amount...of...water...as...before....Normally..the..crop..would..be..planted..along..contour..lines..and..the..water..supply..pipes..(laterals)..would..be..laid..along..the..contour..also...

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