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DESCRIPTION OF THE STUDY AREA
MATERIALS AND METHODS
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alluvial soils alluvium approved road 89 approximately Atriplex canescens bulk density clay compacted and decompacted compacted soil Cosmetic Spray creosote bush Creosote Germination Creosote transplants cryptogamic crust decompacted gypsum desert pavement desert varnish Elvidge and Iverson Ephedra viridis erosional damage exclosure Figure Figure Figure g/cc Germination and Cosmetic germination rate gypsic gypsophile gypsum deposit gypsum soil Halophytic infiltration rate infiltrometer Lake Mead National Lake Mead Recreation Larrea tridentata Mead National Recreation Mead Recreation Area mechanical decompaction mesokurtic moisture content Mojave Desert mulch application mulch area Na0H National Recreation Area off-road vehicle off-road vehicle traffic ORV traffic pair-wise comparison Particle-Size Analysis penetration resistance Penetrometer readings Photograph of view pristine gypsum pristine soil Reclamation recontoured revegetation rock mulch seedlings seeds significantly different soil crust soil moisture southern Nevada square meters study area surface trail type of damage view of study water erosion Webb and Wilshire