mohr circle of stressmohr envelopemohs scale of hardnessmoisture equivalentmoisture mass percentagemoisture pressuremoisture ratiomoisture release curvemoisture retention curvemoisture tensionmoisture volume percentagemoldboard tillagemollic epipedonmollisolsmonomorphic materialmontmorillonitemontmorillonite saponite groupmontmorilloniticmormorainemosaicmosepic plasmic fabricmost probable numbermottled zonemottlesmountain soilsmucigelmuckmuck soilmucky peatmudflowmudflow slidemulchmulch farmingmulch tillagemultilevel samplingmultispectralmunsell color systemmuscovitemutualismmyceliummycomycorrhizann valuenarrow row plantingnatric horizonnatural erosionnatural leveeneocutan