SGS-LTER Playa Coring on the Central Plains Experimental Range, Nunn, Colorado, USA 1992- 1993

CPER Deep Playa Cores - This study was initiated by Dr. Carolyn Olson, Staff Leader, Field Investigations, National Soil Survey Laboratory. Four soils were sampled at landscape positions associated with the most prominent playa on the CPER: playa, playa rim, backslope above playa, and playa outlet. The soils were sampled by genetic horizon to depths of 14 m, 18 m, 6 m and 17 m, respectively. Pedons were analyzed at the National Soil Survey Laboratory, Lincoln, Nebraska. Analyses included: particle size (including fractionation of sand, silt and clay); organic C; dithionate-citrate extractable Fe, Mn and Al; NH4OAC extractable bases; exchangeable Na; water-extracted cations and anions; CEC.