USDA Acreage Report

Every June, the USDA surveys farmers about what they planted and their intentions for the rest of the year. The USDA Acreage Report is raw supply data—how many acres of corn, soybeans, wheat, and other crops are in the ground. Futures markets move 2–5% in seconds when the report is released.

Why June acreage matters more than you’d expect

Planting is complete by late May. A farmer who hasn’t planted corn by then is planting soybeans, wheat, sorghum, or leaving ground fallow. The marginal choice is usually corn versus soybeans—both planted in spring, both harvested in fall, both traded on futures exchanges. The question for markets is always: how much of each?

A farmer with 500 acres might have planted 250 corn and 250 soybeans last year. This year, if soybean prices are more attractive (relative to corn), she plants 300 soybeans and 200 corn. This shift—scaling up or down acreage—is the mechanism by which farmers respond to price signals. When soybean futures rally, planting intentions shift; when corn rallies, farmers switch back.

The Acreage Report quantifies this response. If the market expected 90 million corn acres but NASS reports 92 million, that’s 2 million more acres—roughly 100 million additional bushels of production on the year. At current prices, that’s a $300 million swing in supply value, and futures prices reflect it. Markets hate surprise; a large miss on acreage is a market-moving miss on supply.

The survey methodology and inherent noise

NASS surveys roughly 8,000 farm operators in April and May, asking what they planted and what they intend to plant. Surveys are voluntary. Response rates are high (60–70%) but not 100%, so NASS imputes data from non-respondents based on regional characteristics and historical patterns.

The survey is conducted early (April–early May), so responses are based on plantings that are ongoing or nearly complete. A late frost in May that kills seedlings might not be captured in the June release; it’s reflected in the August WASDE Report when yield estimates are revised downward.

Sampling variation is real. Even with 8,000 farms, a 95% confidence interval on corn acreage is typically ±1–2 million acres (out of 90–95 million total). So a report showing 91.5 million acres might actually mean 89.5 to 93.5 million with reasonable probability. Markets often overreact to estimates that fall within the margin of error.

USDA also publishes “Intentions to Plant” in March (before planting) and “Acreage” in June (after planting). March intentions can be revised substantially by June—farmers change their minds due to weather, input costs, or price moves.

How markets react in real time

The Acreage Report is released at 12:00 noon Eastern on a Friday in mid-June. Futures traders get the data instantly via news feed. A large miss—say, 94 million corn acres reported when the street expected 91 million—triggers immediate selling. Corn futures gap down 8–12 cents per bushel ($400–600 per contract). Soybean futures rally because lower corn acreage frees up rotational acres, implying more soybean acres next year (if they haven’t already been accounted for in the planting survey).

This is where trading skill becomes valuable. Some traders and hedge funds run models that predict the Acreage Report hours before release, based on weather patterns, soil-moisture data, and agricultural consultants’ field scouting. If a model predicts 92 million corn acres and the street consensus is 90 million, a trader might buy corn futures on Thursday before the report, expecting a positive surprise.

More often, traders are wrong; surprises are truly surprising. On report day, volumes in corn and soybean futures spike 2–5x normal. Bid-ask spreads widen. Volatility spikes. A farmer trying to sell grain into the cash market on Friday morning finds prices have gapped down overnight due to the Acreage Report; she might have been better off selling futures Wednesday.

Revising the full-year supply outlook

The USDA updates its World Agricultural Supply and Demand Estimates (WASDE) on a 10-day cycle. The June Acreage Report, released around June 28–30, typically coincides with or is slightly before the June WASDE (released first Friday of July). So the Acreage Report informs the June WASDE’s crop-production estimates.

Before the Acreage Report, WASDE projections are based on March Intentions data, which is older. The June Acreage Report is the first actual post-planting data. NASS updates its estimate of total production (acres × yield), which feeds into USDA supply estimates (carry-over from prior year + new production – exports – domestic use = carry-out stocks). Lower acreage means lower production, higher carry-out risk (potential carryover to next year), higher prices, and potential tightness.

The math is straightforward but consequential. A 1 million-acre miss on corn (relative to consensus) at 170 bushels per acre is roughly 170 million fewer bushels—or 2.6 million tonnes—of global supply tightness. That’s a meaningful margin between adequacy and tightness.

Corn-soybean trade-off and long-term trends

The most-watched line item is the corn-versus-soybean split. Over the past 30 years, acreage has shifted dramatically. In the 1990s, corn acreage was stable (75–80 million acres); soybean acreage grew as demand from China and livestock feed expanded. By the 2010s, the split had narrowed: soybeans reached 85 million acres, corn held at 90 million. In 2022–2023, after soybean prices spiked during La Niña droughts, corn rebounded to 95+ million acres.

Farmers track the “soybean crush spread”—the revenue from crushing a bushel of soybeans into meal (livestock feed) and oil (cooking, biodiesel) minus the cost of the bushel. When the crush spread is wide, soybeans are profitable; farmers plant more. When it narrows, corn becomes relatively attractive.

Similarly, the “corn-ethanol crush spread” (the revenue from fermenting corn into ethanol and co-products minus corn cost) influences acreage. Ethanol mandates in the US and EU support corn demand; when gasoline prices rise, ethanol becomes more valuable (on a per-gallon equivalent basis), supporting corn acreage.

The Acreage Report each year confirms whether farmers responded to the prior year’s price signals. A farmer who sees soybeans rally in summer and fall will plant more soybeans the following spring. The Acreage Report measures that response with a one-year lag.

Revisions and the August forecast

NASS re-estimates acreage in August based on a smaller, targeted survey (farmers who couldn’t be reached in June). August revisions are typically small (within 1 million acres) but can be meaningful if June’s data was weak or if further weather damage to early plantings is revealed.

Between June and August, the Acreage Report informs trading, but late spring and early summer weather becomes the focus. A drought in July drives the August WASDE revision downward (yield estimates fall), not acreage—acreage is largely locked in by August.

Why the report matters despite its messiness

The Acreage Report is imperfect: it lags actual planting by 2–3 weeks, has sampling error, and is superseded in importance by yield estimates starting in August. Yet traders and farmers hang on the June release because it is the first large data point on supply for the new crop year.

Before the report, supply expectations are based on intentions (which are often revised) and prices (which are forward-looking, not factual). The Acreage Report is actual—farmers are asked what they did, not what they plan to do. It is survey data, not hard physical count, but it is the closest to ground truth available in mid-June.

For farmers holding futures or managing hedge ratios, the Acreage Report can force a reassessment. A farmer who hedged 70% of expected yield based on a 91 million-acre consensus corn crop discovers the actual acreage is 94 million. The implication is lower prices and lower profitability. She might increase her hedge ratio immediately, locking in protection against further downside.

For traders, the report is a flash point for mean reversion or trend extension. If corn futures rallied leading up to the report on weather concerns, and the Acreage Report shows massive acreage (less scarcity than feared), the rally reverses. Conversely, if the report shows lower acreage than expected, a rally can accelerate.

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