# Is the U.S. Corn and Soybean Crop Getting Smaller? - AgWeb

> USDA's August report projected record U.S. corn and soybean yields, but southern rust and emerging drought are raising concerns about the crop. Analysts say the crop may be slipping in yield terms, though USDA could still raise its September estimates. Severe southern rust cases can wipe out up to 45% of a field's yield potential.

- Date: 2025-08-29 · published 2025-08-29T12:00:00.000Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/13062-is-the-u-s-corn-and-soybean-crop-getting-smaller-agweb
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

If disease and drought cut yields below USDA's record projections, feed grain and meal supplies would tighten and support prices. A September USDA upgrade would instead weigh on the market.

## Read by commodity

- SOY: bullish ▲
- CORN: bullish ▲

## Linked price moves

| Commodity | Date | Window | Change % | z-score | Why linked |
| --- | --- | --- | --- | --- | --- |
| CORN | 2025-08-28 | 1 | +2.8% | 3.1 | Southern rust and emerging drought raised doubts about record USDA yields, adding supply-risk premium to corn. |

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2025-10-01 | [Corn diseases lurk in bumper US crop, threatening yields](https://feedsoft.ai/events/22896-corn-diseases-lurk-in-bumper-us-crop-threatening-yields.md) | +1.4% | +2.3% |
| CORN | 2026-10-07 | [Rain-soaked harvest raises quality red flags: What it means for yields and basis in the western Corn Belt - Pro Farmer](https://feedsoft.ai/events/12956-rain-soaked-harvest-raises-quality-red-flags-what-it-means-for-yields-and-basis.md) | -3.0% | -6.6% |
| CORN | 2025-12-03 | [Disappointing Corn Yields in 2025 \| CropWatch \| Nebraska](https://feedsoft.ai/events/13034-disappointing-corn-yields-in-2025-cropwatch-nebraska.md) | +0.7% | -0.4% |
| CORN | 2019-04-22 | [A Vicious, Untreatable Killer Leaves China Guessing - The New York Times](https://feedsoft.ai/events/59460-a-vicious-untreatable-killer-leaves-china-guessing-the-new-york-times.md) | -1.1% | +2.5% |
| CORN | 2019-03-16 | [eFeedLink - Is China's broiler sector finally rebounding?](https://feedsoft.ai/events/60247-efeedlink-is-china-s-broiler-sector-finally-rebounding.md) | +2.6% | -3.5% |
| SOY | 2019-08-02 | [China's soybean demand remains strong amid massive hog losses - UPI.com](https://feedsoft.ai/events/57568-china-s-soybean-demand-remains-strong-amid-massive-hog-losses-upi-com.md) | +2.1% | +1.1% |
| SOY | 2026-10-07 | [Rain-soaked harvest raises quality red flags: What it means for yields and basis in the western Corn Belt - Pro Farmer](https://feedsoft.ai/events/12956-rain-soaked-harvest-raises-quality-red-flags-what-it-means-for-yields-and-basis.md) | -1.5% | -5.2% |
| SOY | 2024-01-25 | [Lessons learned from 2023 soybean season](https://feedsoft.ai/events/13216-lessons-learned-from-2023-soybean-season.md) | -1.5% | -7.5% |

## Sources

- agweb.com: https://www.agweb.com/news/crops/harvest/u-s-crop-getting-smaller

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.