Geoderma

These data present soil profile descriptions and photographs of transects through termite mounds known as heuweltjies the semi-arid to arid Namaqualand region in the Northern Cape Province of South Africa. Two heuweltjie mounds near the town of Buffelsrivier in the Buffels River valley, approximately 43 km west of Springbok, were excavated with a 220 PC Komatsu excavator. These heuweltjies were labelled H1 and H4. Location H1: -29.766540° 17.636620°. Location H4: -29.762680° 17.639690° Chemistry data is included for H1 and H4 The sample numbers for H1 and H4 are in the form: HX-Y-Z where HX refers to which specific heuweltjie the sample is taken from and can be either H1 or H4; Y is the cross section distance from the west end of the heuweltjie, in metres, at which the sample was taken (1 – 58 m), and Z refers to the depth, in cm, down the specific sediment profile at that point. For example, if a sample was taken for H1 at a cross section distance of 4 m and a depth of 30 cm, the sample is called H1-4-30. If only HX-Y is mentioned, with no Z, this refers to the entire soil profile at that distance from the west end. A third heuweltjie was sampled in the open face of a mining excavation on the farm Nuttabooi. Location: -29.576843°; 17.362836°. Sample name prefix NB. Location Kleinzee: Termite nests and activity in the sidewalls of mining excavations on the coast north of the Buffels River mouth near the town of Kleinzee (Kleinsee). Co-ordinates given in file at each location. Location Koingnaas: Termite nests and activity in the sidewalls of mining excavations on the coast south of the Buffels River mouth near the town of Koingnaas. Co-ordinates given in file at each location. The folder named termite pictures includes pictures and descriptions all the termites identified in the field areas.

Soil columns permeated by roots with and without root hairs to assess the contribution of root hairs to soil reinforcement under shear stress.

Distribution of added glucose- and corn-C in different soil C pools.

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Raw data

Bulk soil phosphorus speciation in two Swedish forest soil profiles. Carbon and nitrogen contents, pH, oxalate extractable Si, Al, Fe, P and organic P datasets for two Swedish soil profiles.

Used in the article "Challenges and lessons for measuring soil metrics in household surveys"

The dataset contains soil X-ray powder diffraction (XRPD) data and associated soil properties for subsoil samples from the AfSIS Sentinel Site survey. As such it represents data from 60 Sentiel sites across sub-Saharan Africa, acconting for a wide range of agro-ecological environments. The 'xrd.zip' file contains the 935 soil XRPD patterns. Each XRPD file is in space separated ASCII format. The first column is 2theta (i.e. x-axis) and second column is the counts (i.e y axis). The 'clusters_and_properties.csv' contains the associated site and soil information for each XRPD measurement, including: -SSN: a unique identifier used to link the soil property and XRPD data -Sentinel_site: The name of the Sentinel site -Latitude: latitude in decimal degrees -Longitude: longitude in decimal degrees -xrpd_cluster: A numeric factor of 1 to 9 denoting the mineralogical cluster of the soil, defined from cluster analysis of the XRPD data -xrpd_cluster_subset: A logical column denoting whether the data are included in the subset clusters of the associated manuscript -pH: soil pH -TOC: Total organic carbon concentration (mg/kg) -K, Ca, Mn, Fe, Ni, Cu and Zn: Total element concentrations analysed by total X-ray fluorescence spectroscopy (mg/kg) -m3.B, m3.Mg, m3.K, m3.Ca, m3.Mn, m3.Fe, m3.Cu and m3.Zn: Extractable element concentrations determined via Mehlich 3 extraction (mg/kg)

Data include predictors (OM and texture) besides water contents and hydraulic conductivity for Danish soils

Raw data set of soil analyses (carbon, nitrogen, stable isotopes, texture, CEC, nutrients), records of woody cover, NDVI,