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Soil sampling requirements in Nebraska

Soil sampling requirements in Nebraska

State rules: Nebraska Administrative Code, Title 130, Livestock Waste Control Regulations. State guidance: Nebraska Extension sampling advice.

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

How often do you need to soil sample in Nebraska?

When in the year should soil be sampled in Nebraska?

  • Nebraska Extension sampling advice Official guidance Late fall or early winter, except for nitrate testing on coarse-textured soils. Where nitrate may have leached over winter or spring, spring sampling before planting is the preferred option.

How many acres can one soil sample cover in Nebraska?

How deep should soil samples be taken in Nebraska?

  • Nebraska Extension sampling advice Official guidance 0 to 8 inches (0 to 20.32 cm) for pH, lime need, organic matter, P, K, S and Zn. Nitrate: subsurface cores to 3 feet (91.44 cm), 2 feet (60.96 cm) at minimum.

How many cores go into one soil sample in Nebraska?

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

Nebraska Extension sampling advice: A uniform 100-acre field needs at least 3 composite samples of no more than 40 acres each, and at least 30 cores in all, 10 per sample.

Samples and cores for any field size

Soil sampling rules in Nebraska, with the exact wording of each source
Country / region Purpose / programme Time / frequency Area per sample Method Depth Cores Status and source
United States
NebraskaUnited StatesNebraska only. Other states set their own rules.Soil phosphorus and nitrogen tests on manure application fieldsLivestock Waste Control Regulations, nutrient management plan
  • Repeat Phosphorus: before the first manure application, then at least once every 5 years while the field is used
  • Repeat Nitrogen: before the first manure application, then at least annually while the field is used
Not specifiedSoil sampling procedures and depths set out in the nutrient management plan. University of Nebraska guidelines may be used; the Department may approve alternatives.Not specifiedNot specifiedConditionalTitle 130, Livestock Waste Control Regulations (effective 23 September 2026)
Who it applies to, the exact wording and every source
Who it applies to
Livestock operations applying for a permit under Title 130, for each field used to land apply manure, litter or process wastewater.
Laboratory and analysis
Soil analytic methods set out in the nutrient management plan. University of Nebraska guidelines may be used; the Department may approve alternatives.
In force from
23 September 2026
Legal text
Nebraska Administrative Code, Title 130, Livestock Waste Control Regulations, Chapter 14, sections 001.10E and 001.11

The wording in the source

Timing

  • Application site soils for phosphorus content before the initial application of manure, litter, or process wastewater and then at least once every five years thereafter if used for application;

    Title 130, Ch. 14, 001.11C

  • Application site soils for nitrogen content before the initial application of manure, litter, or process wastewater, and then sample and analyze at least annually thereafter if used for application;

    Title 130, Ch. 14, 001.11B

Method

  • land application area soil sampling procedures including sampling depths, soil analytic methods

    Title 130, Ch. 14, 001.10E

  • University of Nebraska guidelines for sampling and analysis may be used. The Department may approve alternate methods as appropriate;

    Title 130, Ch. 14, 001.11E

Who it applies to

  • Each applicant for a permit under these regulations shall submit a nutrient management plan that includes at a minimum the following information as applicable:

    Title 130, Ch. 14, 001

  • For each field or field segment used for land application area:

    Title 130, Ch. 14, 001.10

Laboratory and analysis

  • University of Nebraska guidelines for sampling and analysis may be used. The Department may approve alternate methods as appropriate;

    Title 130, Ch. 14, 001.11E

In force

Sources

Sources re-checked every two months, last update October 2026. Reviewed by GeoPard editorial team.
NebraskaUnited StatesNebraska only. Other states set their own rules.Routine soil fertility samplingNebraska Extension sampling advice
  • Season Late fall or early winter, except for nitrate testing on coarse-textured soils. Where nitrate may have leached over winter or spring, spring sampling before planting is the preferred option.
Fields or areas within fields no larger than 40 acres (16.19 ha)Random cores within representative areas for a uniform rate. Management zones or a grid with known sample locations for variable rate.0 to 8 inches (0 to 20.32 cm) for pH, lime need, organic matter, P, K, S and Zn. Nitrate: subsurface cores to 3 feet (91.44 cm), 2 feet (60.96 cm) at minimum.10 to 15 random surface cores per 40-acre area. Six to eight subsoil cores for nitrate.Official guidanceNebraska Extension, G1740 Guidelines for Soil Sampling
Who it applies to, the exact wording and every source
Who it applies to
Advice for Nebraska fields from the University of Nebraska-Lincoln Extension. Not law.
In force from
Under review
Legal text
Nebraska Extension, Guidelines for Soil Sampling (G1740)

The wording in the source

Timing

  • Late fall or early winter is a good time for soil sampling, except for testing nitrate-nitrogen on coarse-textured soils.

    G1740, Time of Sampling

  • If leaching loss of nitrate-nitrogen in the root zone is suspected due to winter or spring precipitation, re-sample the field. Spring sampling prior to planting is the preferred option.

    G1740, Time of Sampling

Area per sample

  • The University of Nebraska–Lincoln recommends that samples represent fields or areas within fields no larger than 40 acres.

    G1740, Collect Soil Cores

Method

  • For uniform fertilizer application, collect soil samples randomly within representative areas of the field. If variable rate fertilizer application is anticipated, sample either in predefined management zones or in a grid pattern with known sample locations.

    G1740, Determine Sampling Approach

Depth

  • In Nebraska, soil test correlation and calibrations for these tests are based on surface samples collected from 0-8 inches.

    G1740, Select Proper Sampling Depth

  • Surface samples are used to determine soil pH, lime need, organic matter, phosphorus, potassium, sulfur and zinc.

    G1740, Select Proper Sampling Depth

  • To accurately predict nitrate-nitrogen in the root zone, subsurface samples should be collected to a depth of 3 feet. A 2-foot sample is the minimum sampling depth recommended for nitrate-nitrogen

    G1740, Select Proper Sampling Depth

Cores

  • Acceptable measurement of the average nutrient status in a 40-acre area can be obtained with 10 to 15 randomly collected surface cores and six to eight subsoil cores for nitrate-nitrogen analysis.

    G1740, Collect Soil Cores

  • Within each of the three management zones in Figure 2b, 10-15 cores should be collected and composited into a sample representing each zone.

    G1740, Figure 2 caption

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.

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