SOME PROPERTIES OF SOLONETZIC (SODIC) SOILS IN WESTERN NORTH DAKOTA
[摘要] TheRhoadesandWadeseriesoftwoSolonetzic(Sodic)soilassociationsintheChestnutgreatsoilgroup(Mollisols)inwesternNorthDakotawerecharacterizedwithrespecttochemicalandphysicalproperties.InfiltrationandvegetativegrowthweredirectlyproportionaltothicknessofAhorizonsandinverselyrelatedtoexchangeableNapercentage(ESP)oftheclaypan.TheimperviousclaypaninRhoadesfrequentlyhadlt; 15ESPbutlowerhorizonshadhigherESPvalues.TheclaypanandlowerhorizonsofWadeusuallyhadESP'sgt; 15.ConcentrationofadsorbedcationsinclaypanlayersofbothassociationswereMggt;Cagt;Nagt;H.TheHwaspresentonlyintheupperfewcentimeters.TheprincipalsolublesaltsoftheRhoadesassociationweresulfatesofNa,Mg,andCalistedindecreasingorderofoccurrence,withtotalconcentrationusuallylt; 120 meq/literofsaturationextract.SolublesaltsoftheWadeassociationgreatlyexceededthosefoundinRhoades;theWadeseriescontainednearlyequalconcentrationso...
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[效力级别] [学科分类] 农业科学（综合）
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