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    • Data from: Depth Matters: Soil pH and Dilution Effects in the Northern Great Plains

    Metadata Updated: June 5, 2025

    Near-surface soil acidification is becoming prevalent in dryland cropping systems throughout the northern Great Plains. To ensure management recommendations are optimized for crop production, soil sampling guidelines are needed that account for depth stratification of soil pH in surface horizons. Soil pH data from two long-term dryland cropping system experiments were evaluated to document outcomes from three depth increments: 0-7.6 cm, 0-15.2 cm, and 0-30.5 cm. The experiments were established in 1984 and 1993 on the Area IV Soil Conservation Districts Cooperative Research Farm near Mandan, North Dakota USA. Soil cores were collected from the surface 30.5-cm depth near the middle of each experimental plot using a hydraulic probe. Collected soil cores were carefully split into 0-7.6, 7.6-15.2, and 15.2-30.5-cm increments and composited by depth. Samples were dried, mechanically ground, and analyzed within 6 wk of collection. Soil pH was measured in a 1:1 soil/water mixture (by mass) with an ion-selective glass electrode. From the sampled depths, weighted averages were used to calculate soil pH at 0-15.2 and 0-30.5 cm. Data may be used to better understand depth effects on soil pH under dryland cropping systems within a semiarid continental climate. Applicable USDA soil types include Temvik, Wilton, Grassna, Linton, Mandan, and Williams.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: Creative Commons CCZero

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    Dates

    Metadata Created Date January 31, 2025
    Metadata Updated Date June 5, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from USDA JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 31, 2025
    Metadata Updated Date June 5, 2025
    Publisher Agricultural Research Service
    Maintainer
    Identifier 10.15482/USDA.ADC/28143170.v1
    Data Last Modified 2025-05-02
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 005:18
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 0511a582-ac09-41fa-9e35-e4bffbbfeb07
    Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
    Harvest Source Title USDA JSON
    License https://creativecommons.org/publicdomain/zero/1.0/
    Program Code 005:040
    Source Datajson Identifier True
    Source Hash 3aea17e44011cc73b34b81a705b00bbbd48dd4ba245a3f59a054d5377afd04df
    Source Schema Version 1.1
    Temporal 1983-04-01/2012-04-01

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