新しい2026年10月リリース予定： ジョンディア同期システムの再設計、レートの最小値と最大値の制限、収量レポートゾーン

メリーランド州における土壌サンプリングの要件

メリーランド州における土壌サンプリングの要件

州の規則：COMAR 15.20.08（栄養管理規則）およびCOMAR 15.20.07。州のガイダンス：メリーランド大学エクステンションの土壌サンプリングに関する助言。.

メリーランド州における土壌サンプリング：頻度、面積、深度、およびコアサンプル

メリーランド州では、どのくらいの頻度で土壌サンプルを採取する必要がありますか？

メリーランド州では、土壌サンプルを採取するのに最適な時期はいつですか？

メリーランド州では、土壌サンプルはどのくらいの深さまで採取すべきですか？

メリーランド州では、1つの土壌サンプルを採取するのに何本のコアが必要ですか？

Soil sampling rules in Maryland, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
MarylandUnited StatesMaryland only. Other states set their own rules.Soil analysis results in a nutrient management planMaryland Nutrient Management Program (Maryland Department of Agriculture)
  • Result valid Soil analysis results valid for 3 years, unless a documented exception applies
Not specifiedStandard soil sampling methods acceptable to the Department, per field or management unit. Documented variations: larger uniform fields or a crop rotation as one unit, combined strip-cropped fields, smaller units for specialized production.Not specifiedNot specifiedConditionalCOMAR 15.20.08.05, Required Plan Recommendations
Who it applies to, the exact wording and every source
Who it applies to
Agricultural operations with gross annual income of 2,500 dollars or more, or eight or more animal units, that use chemical fertilizer, animal manure or biosolids, for each field or management unit in the plan.
Outside the rule
The 3-year validity does not bind where documented: a new-technology management system needs less frequent analysis, no nutrient application is needed, or nutrients go on less than once every 3 years.
Laboratory and analysis
Standard soil analysis methods acceptable to the Maryland Department of Agriculture.
In force from
Under review
Legal text
COMAR 15.20.08, Nutrient Management Regulations, and COMAR 15.20.07, COMAR 15.20.08.05D; 15.20.07.05; 15.20.08.03B(2)

The wording in the source

Timing

  • Soil analysis results for a plan are valid for 3 years, except if the following conditions exist and are documented by the consultant or certified farm operator:

    COMAR 15.20.08.05D(3)

Method

  • Soil analysis results for each field or management unit shall be based on standard soil sampling and analysis methods acceptable to the Department.

    COMAR 15.20.08.05D(1)

  • Soil samples collected from larger fields or acreage with uniform characteristics, including soil types, moisture, or fertility management history; crop rotations may be sampled as one management unit;

    COMAR 15.20.08.05D(2)(a)

  • Soil samples from fields, such as those common to strip cropping, which may be combined if the soils, previous cropping history, and soil fertility management are similar; and

    COMAR 15.20.08.05D(2)(b)

  • Any specialized production unit which may warrant smaller sampling units.

    COMAR 15.20.08.05D(2)(c)

Who it applies to

Outside the rule

Laboratory and analysis

  • Soil analysis results for each field or management unit shall be based on standard soil sampling and analysis methods acceptable to the Department.

    COMAR 15.20.08.05D(1)

Sources

Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.
MarylandUnited StatesMaryland only. Other states set their own rules.Routine soil fertility samplingUniversity of Maryland Extension soil sampling advice
  • Repeat At least once every three years, more often if possible
  • Season Consider the same month each round. Fall after harvest and before nutrient applications is recommended.
  • Wait At least six weeks after fertilizer or manure
Not specifiedSample each management unit separately, cores at random across the unit. Grid or zone sampling where it fits the farm.Fertility, cropland and pasture: 0 to 8 inches. Pasture and continuous no-till: a second 0 to 2 inch sample for pH only.At least 15 to 20 cores for units of about 20 acres or less. At least one per acre for 20 to 30 acres. Less than one per acre is acceptable above 40 acres.Official guidanceUniversity of Maryland Extension FS-1184 (PDF)
Who it applies to, the exact wording and every source
Who it applies to
Advice for Maryland fields from University of Maryland Extension. Not law.
Laboratory and analysis
A regional soil testing laboratory suitable for nutrient management planning in Maryland (UM-ANMP list).
In force from
Under review
Legal text
University of Maryland Extension FS-1184, Soil Sampling for Optimizing Agricultural Production in Maryland (November 2021)

The wording in the source

Timing

  • Soil samples should be collected at least once every three years, more often if possible.

    FS-1184, When to Sample, p. 1

  • For each new round of soil sampling, consider collecting samples in the same month of the year to reduce seasonal effects and associated variability.

    FS-1184, When to Sample, p. 1

  • sampling in the fall after harvest but before any nutrient applications is recommended.

    FS-1184, When to Sample, p. 1

  • Do not collect soil samples within a minimum of six weeks of fertilizer or manure applications to reduce the risk of more variable and non-representative results.

    FS-1184, When to Sample, p. 1

Method

  • Sample a management unit by pulling individual soil cores randomly throughout the entire management unit and mixing those cores into one sample for analysis.

    FS-1184, How to Sample, p. 3

  • Grid- or zone-based precision soil sampling may be appropriate when considering intended farm management, equipment capabilities, and field features.

    FS-1184, Where to Sample, p. 1

Depth

  • For soil fertility assessment of cropland and pasture fields and the Fall Soil Nitrate Test (FSNT), sample to a depth of 0 to 8 inches (see Figures 5 and 6).

    FS-1184, Soil Sampling Depth, p. 3

  • For pasture and continuous no-till cropland fields, a second sample to a depth of 0 to 2 inches is recommended to be taken and analyzed for pH only.

    FS-1184, Soil Sampling Depth, p. 3

Cores

  • Collect a minimum of 15 to 20 soil cores from field management units that are ~20 acres or less. At least one soil core per acre is recommended for management units that are 20 to 30 acres. A sampling intensity of less than one soil core per acre is acceptable for management units exceeding 40 acres.

    FS-1184, How to Sample, p. 3

Laboratory and analysis

  • A list of regional soil testing laboratories suitable for nutrient management planning in Maryland can be found at the University of Maryland Agricultural Nutrient Management Program’s (UM-ANMP) website.

    FS-1184, Sample Preparation, p. 4

Sources

Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.

アメリカ合衆国：連邦規則およびその他のすべての州

各国の土壌サンプリング規制

古い要件を報告する： info@geopard.tech

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サンプルごとの面積、コア数、およびルールで指定する深さを設定します。GeoPardは、グリッドまたはゾーンごとにポイントを配置し、歩行ルートを決定し、ラベルを印刷し、作成したプランをスマートフォンに転送して現場に提供します。.

サンプリング計画を作成する 土壌サンプリングプランナーを参照してください

これは公式資料に基づいた計画策定の参考資料であり、法的助言ではありません。規則は管轄区域、栄養素、土地利用、プログラムによって異なります。現地調査を行う前に、最新の公式文書と研究室の指示書を確認してください。.

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