P availability data for samples across parent material, landform, and vegetation collected at Jornada Experimental Range

This dataset contains biogeochemical measurements collected from the Jornada Experimental Range dryland soils during the 2022 growing season (mid-September). A KMZ file is provided to visualize sampling locations and site characteristics. Soil cores (0-10 cm) were collected from three desert landforms with varying parent materials and two microhabitats (under-plant and interspace). Samples from the cores were reacted with citrate, oxalate, and malate (10 –10,000 µM). The extracts were analyzed for PO43- (inorganic P) concentrations via the malachite green colorimetric method, total P, and cations (Ca, K, Mg, Fe, and Mn) by hydraulic press/x-ray fluorescence (XRF), dissolved cations (Ca, K, Mg, Fe, and Mn), and total dissolved P by inductively coupled plasma–optical emission spectroscopy (ICP-OES), organic P (the difference between total dissolved P and inorganic P), and in situ concentrations of organic acids by gas chromatography-mass spectrometry (GC-MS). These datasets support analyses to determine the threshold concentration range of organic acids that mobilize phosphorus across parent material/landforms/vegetation in Chihuahuan Desert soils.