ustoxustultsvvadose watervadose zonevadozevalley terrainvalue colorvapor flowvariable chargevariantvarvevegetative cellventifactventilated cellvermiculitevertical mulchingvertical shrinkagevertical zonationvertisolsvery coarse sandvery finevery fine sandvery fine sandy loamvesiclesvesicular arbuscularvitrandsvo masepic plasmic fabricvoid ratiovolcanic ash landvolcaniclasticvolume weightvolumetric water content soilvosepic plasmic fabricvughswwastelandwater conductivitywater contentwater drop penetration timewater mass contentwater release curvewater repellent soilwater retention curvewater soluble phosphatewater stable aggregatewater tablewater table perchedwater tensionwater use efficiency