Soils were sampled under Prosopis at four sites and under Larrea at one site on the Jornada Desert Site on October 1, 1986. Samples were taken from two depths (0-15cm, 15-30cm) for three canopy positions and one interzone position for each tree or shrub. Four trees or shrubs were sampled at each site.
The soils were analyzed for Total Kjeldahl Nitrogen (TKN), and inorganic N-- nitrate-N and ammonium-N.
Data file information for the following Jornada data set: Surface Soil Canopy Position Nutrients