NewOctober 2026 release: John Deere sync redesign, rate min and max limits, yield report zones

Soil sampling requirements in Connecticut

Soil sampling requirements in Connecticut

State rules: Connecticut DEEP General Permit for Concentrated Animal Feeding Operations, DEEP-WPED-GP-030, issued under section 22a-430b of the Connecticut General Statutes. State guidance: University of Connecticut Soil Nutrient Analysis Laboratory, soil nutrient sampling instructions.

Soil sampling in Connecticut: frequency, area, depth and cores

How often do you need to soil sample in Connecticut?

When in the year should soil be sampled in Connecticut?

How many acres can one soil sample cover in Connecticut?

How deep should soil samples be taken in Connecticut?

How many cores go into one soil sample in Connecticut?

How many soil samples does a 100-acre field need in Connecticut?

University of Connecticut Soil Nutrient Analysis Laboratory, soil nutrient sampling instructions: A uniform 100-acre field needs at least 7 composite samples of no more than 15 acres each, and at least 84 cores in all, 12 per sample.

Samples and cores for any field size

Soil sampling rules in Connecticut, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
ConnecticutUnited StatesConnecticut only. Other states set their own rules.Soil phosphorus test on Large CAFO land application fieldsConnecticut DEEP General Permit for Concentrated Animal Feeding Operations (CAFO GP)
  • Repeat Soil analyzed for phosphorus at least once every 5 years
Not specifiedNot specifiedNot specifiedNot specifiedConditionalConnecticut DEEP, CAFO General Permit DEEP-WPED-GP-030 (PDF)
Who it applies to, the exact wording and every source
Who it applies to
Large CAFOs registered under the Connecticut CAFO General Permit (DEEP-WPED-GP-030) that land apply manure, litter, digestate or agricultural wastewater.
Laboratory and analysis
Phosphorus content. Results are used to set manure, litter, digestate and wastewater application rates.
In force from
1 January 2023
Legal text
Connecticut DEEP General Permit for Concentrated Animal Feeding Operations, DEEP-WPED-GP-030, issued under section 22a-430b of the Connecticut General Statutes, Section 5(f)(1)(A)

The wording in the source

Timing

  • Manure must be analyzed a minimum of once annually for nitrogen and phosphorus content, and soil analyzed a minimum of once every five years for phosphorus content. The results of these analyses are to be used in determining application rates for manure, litter, digestate and other agricultural wastewater.

    Section 5(f)(1)(A), Manure and soil sampling

Who it applies to

Laboratory and analysis

  • soil analyzed a minimum of once every five years for phosphorus content.

    Section 5(f)(1)(A)

In force

  • Effective Date: January 1, 2023 Expiration Date: December 31, 2027

    Cover page

Sources

Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.
ConnecticutUnited StatesConnecticut only. Other states set their own rules.Routine soil fertility samplingUniversity of Connecticut Soil Nutrient Analysis Laboratory, soil nutrient sampling instructions
  • Season Any time the ground is not frozen. Fall is highly recommended.
No sample may represent more than 15 acres12 or more random, evenly distributed spots. Separate samples for areas that differ in topography, drainage, texture, crop growth or use, soil color, or fertilizer history.Crop field 6 to 8 inches or the plough layer depth. Grass 3 to 4 inches.12 or more cores or slices per sampleOfficial guidanceUConn Plant and Soil Health Center, Sampling Instructions
Who it applies to, the exact wording and every source
Who it applies to
Advice for Connecticut farms, gardens and lawns from the University of Connecticut soil testing laboratory. Not law.
In force from
Under review
Legal text
UConn George Leigh Minor Plant and Soil Health Center, Soil Nutrient Sampling Instructions

The wording in the source

Timing

  • Samples may be collected any time of year the ground is not frozen. The waiting period for results is longest in April and May. Testing the soil in the fall is highly recommended.

    When and How to Sample

Area per sample

Method

  • Submit a separate sample for areas differing in topography, drainage, soil texture, with different crop growth or intended crop usage, soil color, or fertilizer/amendment history.

    When and How to Sample

Depth

Cores

  • collect cores or thin slices of soil from 12 or more random, evenly distributed spots (sampling points) in your sample area

    Sample Collection

Sources

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

United States: federal rules and every other state

Soil sampling regulations in every country

Report an outdated requirement: info@geopard.tech

Plan the points to the rule that applies

Set the area per sample, the cores and the depth your rule asks for. GeoPard places the points on a grid or by zone, routes the walk, prints the labels and takes the plan to the field on a phone.

Create a sampling plan See the Soil Sampling Planner

A planning reference built from official sources, not legal advice. Rules apply by jurisdiction, nutrient, land use and programme: check the current official text and your laboratory’s instructions before fieldwork.

wpChatIcon
wpChatIcon

    Request Free GeoPard Demo / Consultation








    By clicking the button you agree our Privacy Policy. We need it to reply to your request.

      Subscribe


      By clicking the button you agree our Privacy Policy

        Send us information


        By clicking the button you agree our Privacy Policy

        We use cookies to provide you with the best browsing experience, personalise content of our site, analyse its traffic and show you relevant ads.
        See our privacy policy for more information.

        Accept all