YOUR LAND. A LITTLE MORE UNDERSTOOD.

A clearer next step
for your land.

Understand your soil. Work with your water.
Make a plan that fits your farm.

Start with my field

Free to explore. No account needed.

Grounded in public soil data
UC DAVIS · USDA · FAO
Regional insight. Field-level follow-up.

LET’S START HERE

Where is your field?

Zoom in and click your field. We’ll look up the soil around it.

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California farmland

Click the map to choose a location. Soil estimates cover a wider area than one field.

⌖ 800 m soil survey estimatesMapped values are a starting point, not a soil test.

KNOW WHAT’S BEHIND THE ADVICE

Real sources.
Clear limits.

SoilLens brings public soil surveys and established agricultural guidance into one place. Regional maps help you decide what to investigate. Your soil test and local adviser help you decide what to do.

See our sources & references ↗
TRANSPARENT BY DESIGN

Data & methods

Source: six FAO GSOCseq v1.1 GeoTIFFs clipped to California by the hackathon organizers. The site reads converted Float32 values, preserving the original 1260 × 1140 grid and -999 no-data values. The coordinate system is EPSG:4326, with approximately 1 km cells. The bounding box also includes parts of neighboring states.

The baseline is modeled soil organic carbon in the top 0–30 cm in 2020; future values are model outputs for 2040. SSM1, SSM2 and SSM3 assume carbon inputs increase by 5%, 10% and 20%, respectively. Additional carbon = SSM − BAU, rather than SSM − 2020. Stocks are in t C/ha. Multiply by hectares for t C, then by 44/12 for the CO₂ equivalent.

Uncertainty is shown only as the raw source value. The supplied README does not define its units, statistic or confidence level, so it is not interpreted as a percentage or prediction interval. Missing values are excluded from calculations. Map placement shows regional source cells; it does not establish field boundaries or jurisdiction.

This tool supports regional screening and cannot replace field soil testing. Mapped surface pH and organic matter come from the California Soil Resource Lab’s 800 m soil grids, aggregated from USDA soil surveys. Surface pH uses ph_05.tif, representing 0–5 cm. Organic matter uses om_kg_sq_m.tif in kg/m²; its depth still needs confirmation. Values are sampled from the source cell containing the center of the selected carbon cell after transforming EPSG:4326 coordinates to EPSG:5070; they are not field measurements. pH reaction classes follow the source map legend (6.6–7.4 is neutral). Organic matter and organic carbon are different quantities and are not interchanged. The source maps represent regional patterns, not field-level accuracy. Mapped EC and available water storage for 0–25 cm are also provided. EC is a screening indicator; water storage is capacity, not current moisture or an irrigation schedule. Field action priorities use explicit rules and user context, with source links. Farm inputs and lab results are unverified; no nutrient or amendment rates, crop yield predictions or carbon credits are calculated. Farm drafts are stored only in the visitor’s browser when explicitly saved. Street maps are provided by OpenStreetMap; external map requests are required to show the basemap. Scenarios cannot be directly attributed to practices such as cover cropping or no-till. Field guidance is generated by transparent, reproducible rules rather than a generative language model.

FAO source ↗ · License ↗ · Carbon metadata ↗ · Soil property metadata ↗ · UC Davis soil source ↗