Learn what data Regrow needs from your soil sampling lab to model carbon outcomes on your fields.
After you've taken soil samples from your fields and sent them to the lab for analysis, you can share the results with Regrow so they can be applied to predict the soil properties needed to initialize DNDC for the remaining, non-sampled fields.
The following sections explain the data needed by Regrow and how it's used to model soil properties on remaining fields.
Pro tip: Provide the attached template for soil sample results to the lab analyzing your samples to ensure all required data is collected and formatted correctly.
Any required data that is not provided to Regrow, or ambiguous data (for example: missing units) will result in delays processing samples and running the Predictive Model, as back-and-forth will the lab will be needed to get clarity.
Unique identifiers
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MD5: This is the unique field identifier from Regrow, which ensures that each sample is correctly linked to the corresponding MRV field.
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Sample ID: A unique ID for each requested sample, allowing for accurate tracking and reference. This value was provided as part of the original Sample Design Plan and should be retained with the sample results to ensure actual sampled locations can be matched back to the originally suggested point.
Sample location & depths
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Sample x-coordinate & y-coordinates: Sometimes the actual location the sample was taken from is different than what was suggested by the original Sample Design Plan. This can happen if the spot is inaccessible due to rocks, roads, landmarks, etc. Please include the coordinates for the precise location where the sample was taken, as this is important for spatial analysis & predictive modeling, especially if the actual sampled point is more than 30m away from the suggested location.
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Planned sample depth: Indicates the intended depth for sampling, ensuring consistency in data collection.
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Actual sample depth: Reflects the real depth at which the sample was taken, essential for validating data accuracy.
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Core diameter: The diameter of the soil core affects bulk density calculations and helps in normalizing sample results.
Timing of sample processing
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Date sample was extracted: This is the date the sample was taken from the field.
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Date sample was analyzed by the lab
Mass & density measurements
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Total dry mass (g): The total mass of the dried sample.
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Carbon Stock (t/ha): Indicates the total amount of carbon stored in the soil per hectare.
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Total carbon %: The percentage of total carbon present in the sample, useful for understanding soil organic matter content.
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SOC % (Soil Organic Carbon): The proportion of organic carbon or the total carbon in the sample.
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Inorganic carbon %: The proportion of inorganic carbon or the total carbon in the sample.
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Total Dry Bulk Density (g/cm³).
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Fine Bulk Density (g/cm³)
Soil composition & properties
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Needs clay & pH sampled?: Indicates whether additional testing for clay content and pH was required. Fields requiring pH and clay samples would have been denoted in the original Sample Design Plan provided by Regrow.
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Clay fraction: The proportion of soil particles that are classified as clay.
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pH
Additional Data
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Notes: Any additional observations or special conditions noted during sampling, or lab analysis. Optional.
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Images: Photos of the sample site or extracted cores. Optional (but may be required for CAR SEP projects).