DISTRIBUTION OF IRON, CLAY AND EXTRACTABLE IRON AND ALUMINUM IN SOME SASKATCHEWAN SOILS
[摘要] Thevariabilityofoxalate-anddithionite-extractableironandaluminumthroughoutthesoilprofileandtheirrelationshiptototalironandclaycontentswereinvestigatedforsoilsrepresentativeoftheChernozemic,Solonetzic,LuvisolicandGleysolicsoilordersofSaskatchewan.ThesedistributionsandrelationshipsaresimilarforChernozemic,SolonetzicandLuvisolicsoils.Theyindicatecomigrationofironandclay.Oxalate-extractableironislowandrelativelyconstantthroughoutthedepthofthesoil.Dithionite-extractableironissomewhathigherandalwaysexhibitsamaximumintheBhorizons.InallbuttheLuvisolicsoils,theratiosofdithionite-extractableirontoclayaresignificantlyhigherintheAehorizonthanintheBhorizons.Thisreflectsahighercontentofdithionite-extractableironinthecoarseclayfractionthaninthefineclayfractionofthesesoils.Gleysolicsoilsshowdifferentrelationshipsinsomerespects;oxalate-extractableironequalsthatextractedbydithioni...
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[效力级别] [学科分类] 农业科学（综合）
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