Climate and Geographic Concentration
Definition
Geographic and climate concentration is the share of a farmland portfolio's value or income exposed to the same weather, water source, crop, market or tenant. Farms in the same county share droughts, floods and freezes; farms in the same groundwater basin share pumping limits; orchards of one crop share its price; farms leased to one operator share its credit. Diversification across many farms reduces risk only if those farms do not share these exposures. Measured by income rather than acres, concentration is often much higher than a map of farm locations suggests.
Why it matters
Farmland is often pitched as diversified because it is uncorrelated with stocks, but a farmland portfolio can be highly concentrated within itself. Several farms in one California basin share a groundwater plan and a drought; several orchards of one nut share a price collapse; several farms leased to one operator share its fate. For a fractional investor buying farm by farm, building diversity means choosing farms that do not share those exposures, and for a fund investor it means asking for concentration by income, crop, basin and tenant.
Common misconceptions
- •Many farms are not automatically diversified. Shared regions, water and tenants concentrate risk.
- •Acres understate concentration. High-value permanent crop acres can dominate income.
- •Different states do not guarantee different weather or markets.
- •A single tenant across farms is a single credit risk.
Technical details
Farmland Partners, 2025 (Form 10-K, Note 3)
Corn Belt: 51.1% of acres, 45.8% of rental income.
West Coast (California): 13.9% of acres, 44.2% of rental income.
Delta and South: 10.5% of acres, 2.4% of rent; High Plains: 10.3% of acres, 5.3%; Southeast: 14.2% of acres, 2.3%.
Tenant A (a California permanent crop operator): 33.4% of rental income; Tenant B: 10.2%.
Concentration checklist
Share of income and value by state, county and water basin.
Share by crop, and by permanent versus row crop.
Share by tenant and operator group.
Exposure to the same water district, groundwater plan or flood system.
How investors apply the term
Investors usually apply this term by tying the definition back to the controlling documents and then asking which cash flows, rights, restrictions, or valuation assumptions it changes. A useful review looks at the term alongside fees, leverage, liquidity, reporting frequency, and manager discretion rather than treating it as a standalone concept.
The practical diligence test is simple: identify who benefits if the assumption is wrong, who has control when conditions change, and what evidence the investor receives after closing. Terms that cannot be reconciled to documents, cash movements, and monitoring data should be treated as marketing shorthand until proven otherwise.
Frequently asked questions
- How should concentration be measured?
- By income and value, not just acres. Farmland Partners' 2025 Form 10-K shows the West Coast (California) at 13.9% of its acres but 44.2% of its rental income, and the Corn Belt at 51.1% of acres and 45.8% of rent.
- Can one tenant be a concentration risk?
- Yes. Farmland Partners reported that one tenant, a California farming entity with numerous permanent crop leases, accounted for 33.4% of its 2025 rental income, and another 10.2%.
- Is a single-farm investment concentrated?
- Completely. One farm means one location, one water source, one crop mix and usually one tenant. Diversification has to come from holding several farms in different regions, crops and water systems.
- How does climate change affect concentration?
- By making shared weather events more frequent or severe and by moving water availability. Farmland Partners cites 'the effects of climate change and water availability' among the conditions that may affect variable rent and tenants' ability to pay.