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A Complete Guide to Residual Fertility Farm Tax Benefits

One of the most overlooked but potentially lucrative tax breaks for farmers, the Section 180 deduction can mean tax deductions averaging $1,200/acre for every acre of land actively used in farming. And, this deduction applies to anyone who has bought or inherited land as far back as 2010.

Section 180 isn’t a new farm tax deduction—it’s been in the U.S. tax code since 1960. But farmers and other agricultural landowners often miss or skip claiming the write-off for three reasons:

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With average tax desuctions of $1,200+ per acre, the average American farm, at 466 acres, could see a one-time deduction of $559,200.

Successfully deducting the value of residual fertility requires accurate data and defensible documentation. For eligible landowners, this tax break can be well worth the work.

What Section 180 Means

The How and Why Behind the Tax Benefit

IRS Section 180 gives agricultural landowners a way to capitalize on the value of the excess or “residual” soil fertility they purchased or inherited.

It recognizes what agricultural landowners know: residual soil fertility has a measurable economic value, and that value isn’t static.

In the context of Section 180, excess nutrients are treated like a depreciable asset.

What is 'Residual Fertility'?

If land you’ve bought or inherited shows residual fertility, it means nutrient levels in the soil at the time of acquisition exceeded what crops need for a normal yield.

Nutrients that can be evaluated for residual fertility:

Zn

Zinc

Mn

Manganese

Cu

Copper

N

Nitrogen

P

Phosphorus

K

Potassium

S

Sulfur

Ca

Calcium

Mg

Magnesium

Fe

Iron

B

Boron

This example shows what residual calcium can look like:

Calcium Residential Fertility Graphic
Soil Analysis Result
Calcium Critical Level
Calcium ResidualFertility
Soil Analysis Result Total
Section 180 isn’t a loophole. It’s accounting for value you already own.

You might see Section 180 called a Residual Fertility Deduction, an Excess Fertility Deduction, or a Legacy Nutrient Deduction. Those are all different names for the same thing: how the IRS treats the depreciation of higher-than-baseline amounts of soil fertility.

As crops grow, excess fertility is consumed. By documenting it, you may be able to claim farm tax deductions. 

Who's Eligible for Section 180 Deductions?

If you operate an active production agriculture business on land that has excess residual fertility, you may be eligible for a Section 180 tax deduction. 

Section 180 Eligibility At a Glance
Taxpayer

Owns land actively used in the business of production agriculture

Land

Used to produce crops, timber, or other ag products; or sustain livestock

Nutrients

Properly analyzed and documented, above a field-specific baseline

Ownership

Land acquired via purchase or inheritance since 1960

For information only. Not tax advice.

How is Advanced Agrilytics Different?

We're Partners in a Defensible IRS Claim

At Advanced Agrilytics, our team of 100+ agriculture experts includes agronomists and soil experts who specialize in the science of residual fertility.

Section 180 claims are a space where our expertise shines.

We apply.

Advanced forensic agronomy at sub-acre resolution—deep soil science that quantifies, attributes, and defends residual soil fertility.

We prepare.

The Residual Fertility Valuation Report, built to IRS evidentiary criteria with patented sub-acre spatial modeling and laboratory soil chemistry.

We deliver.

Unbiased, science-backed analysis documented to withstand IRS scrutiny, so your tax team can file with confidence.

We Deliver Detailed, Defensible Data.

Advanced Agrilytics’ approach is accurate, transparent, and traceable, based on point-level soil data, nutrient-specific critical levels, and over a decade of verified pricing history.

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Business Focus
Critical Levels
RFV method
Soil Sample Analysis
Audit Defense
Soil Collection
Comparision Table

Your CPA Can't Do it Alone.

We’re here to provide the expert soil science and support needed to turn residual fertility into properly filed Section 180 deductions.

Supporting Section 180 Deductions
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Acres Analyzed
0 M +
Sub-Acre Grids Modeled
0 M +
For information only. Not tax advice.

See if Your Eligible For Section 180 Savings

Our team makes it easy to get started and get your claim completed.

There’s no cost and no commitment. We review information you share and let you know if your land qualifies for Section 180. We do not share data.