Soil function in context.
QB Solum integrates soil chemistry and properties with climatic, geographic and management information to characterise the conditions governing soil biological function. The report identifies potential constraints and states the limits of the supporting evidence.
The living record
The soils
26,138
soils in the engine
5,201
soils with at least three properties measured on the same core as their DNA
60
countries
The biology
2,917
bacterial and archaeal genera
14
soil functions reported
The knowledge
59
soil, climate and management variables
848
scientific references
Updated 2026-10-08 from the record store.
How it works
Complete the short intake form.
Upload a photo or PDF of your most recent soil test from any laboratory.
Receive your soil report with the integrated view of your soil as a system.
Two report editions are available: the Practice Edition for crop advisers, agronomists, agrologists, and farmers; and the Research Edition for university researchers, government institutions, and R&D teams.
QB Solum does not replace soil testing or professional agronomic assessment.
Interactive preview
Explore the conditions governing soil function.
Adjust soil chemistry, management and climate conditions to examine the relative responses of the reported trait groups. Responses indicate direction and relative magnitude, not measured biological activity. Combinations outside the supported range are identified.
Interactive preview. Values are indicative and are not a measurement of your soil.
Plans and prices
Your first soil sample is free.
Agronomists, crop advisors, agrologists and farmers
First sample free · US$22 each additional sample
Send the soil analysis you already have. The first sample is free, once per farm; every further sample is US$22.
Soil testing laboratories
Packages for your clients' samples
Add a Solum report to the soil analyses you return to growers. Priced as a package, by the volume of samples you analyse.
Universities and research institutions
Free in Ontario
Free for universities and research institutions in Ontario. Elsewhere, packages are quoted for your project.
Our approach
Reading soil as a living system, from measurements that already exist.
QB Solum characterises the living soil by integrating the whole system: soil chemistry, texture, land management, land-use history, climate, and geographic setting. From these it determines which factors govern the soil's biological processes and where those processes are constrained. Because no single factor governs a living community, the variables are evaluated jointly.
Behind it is a curated evidence base linking these factors to measured soil biology across regions, in which the origin of every value is retained. Every figure Solum reports is stated with the conditions under which it holds, and where the evidence does not support a figure, none is given and the reason is stated. Solum is independent by principle and tied to no manufacturer.
Original work
QB Solum is an original system conceived and developed by Quadros Bio Inc. © 2026 Quadros Bio Inc. QB SOLUM™ is a trademark of Quadros Bio Inc. USA Patent pending. Its methodology, models and curated database are proprietary.
Data sources
- Climate: NASA POWER, power.larc.nasa.gov, CC BY 4.0. The data was obtained from National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division. The data was obtained from the POWER Project's Climatology API v2.10.0, accessed July to October 2026.
- Monthly climate and water balance: TerraClimate, Climatology Lab, University of Idaho. Abatzoglou JT, Dobrowski SZ, Parks SA, Hegewisch KC (2018). TerraClimate, a high-resolution global dataset of monthly climate and climatic water balance from 1958-2015. Scientific Data 5:170191. doi:10.1038/sdata.2017.191
- Mapped soil properties: SoilGrids 2.0, ISRIC World Soil Information, CC BY 4.0. Poggio L. et al. (2021). SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty. SOIL 7:217-240. doi:10.5194/soil-7-217-2021
- Soil survey, United States: Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Soil Survey Geographic (SSURGO) Database, via Soil Data Access.
- Soil landscape grids, Canada: Agriculture and Agri-Food Canada, Canadian Soil Information Service. Contains information licensed under the Open Government Licence – Canada. Geng X., He J., Grima V. et al. (2025). 100 m soil landscape grids of Canada. Scientific Data 12:1178. doi:10.1038/s41597-025-05460-4
- Terrain slope: produced using Copernicus WorldDEM-90 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.
- Ontario chemistry guidance: Ontario Ministry of Agriculture, Food and Rural Affairs (2017). Agronomy Guide for Field Crops, Publication 811. Queen's Printer for Ontario.
- Soil microbiome records: public sequencing datasets and the published studies behind them, each cited in Solum's reference library.