Title: Comprehensive soil analysis data across 75 farms from the grain-growing regions of Australia
Creator/s: Bishop T.F.A, Filippi P, Hoskin N, Whelan B, Pozza L
Contributor/s: Collyer B, Wright J
Licence: Licence upon request
Date data collected or created: 2023-2025
Software/hardware needed to access/use data: Microsoft Excel
File formats the data is saved in: .csv
Geographical coverage: Australia

This collection includes soil analysis data from 75 farms across Australia's dryland cropping regions sampled in the '3D PAWC and constraint mapping' project. Sampling and analysis was compiled from several campaigns between 2023 and 2025.
This data was collected to be used as one of the inputs to digital 3D soil maps that can describe the constraints and PAWC in a given area and can be used to inform management decisions. Using many sites across Australia gives an idea of how this approach works in different environments and soil types.
Sites were selected using a stratified sampling approach where variation in spatial data layers was considered.
Soil analysis of 25 datapoints at 4 depth intervals to 1 m, resulting in 100 samples taken per farm. Unless otherwise stated, depth intervals are 0 - 15 cm, 15 - 30 cm, 30 - 60 cm and 60 - 100cm.
Soil cores were dried at 40 degrees Celsius before being ground to < 2mm, weighed, and sent for analysis.
All analysis was conducted by CSBP labs, aside from gravel content (determined in-house by USyd staff).
Variables: PSA texture (MIR), OC (Walkley-Black), electrical conductivity (1:5), pH (H20), pH (CaCl2), exchangeable cations (without prewash), Ammonium, Nitrate, Phosphorous, PBI and Gravel, Coordinates, Depth, Date, Sample ID.
Coordinates are present in 'EPSG:4326' projection.
Farms were sampled in 3 different campaigns, with 30 farms sampled in 2023, 42 sampled in 2024, and the last 3 sampled in 2025. The date of sampling is available for all farms.

The datasets are stored on the USYD-RDS at \\shared.sydney.edu.au\research-data\PRJ-MLCons. Data access is restricted as the data contains information about private properties and any third-parties seeking use must request access from GRDC and the University of Sydney.

For further enquiries, please contact Dr Patrick Filippi at patrick.filippi@sydney.edu.au