Pro Farmer Tour Counts Miss the Flood Damage Still Coming

Pro Farmer Crop Tour scouts posted an Ohio corn yield of 180.18 bushels per acre on day one and a South Dakota average of 149.09 bushels, both well below last year’s tour marks, as more than 100 teams began walking 2,000-plus fields across a Corn Belt split by record eastern rains and western drought.

The four-day tour runs through Thursday. Pro Farmer issues its national corn and soybean production range on Friday afternoon. That range, not the nightly state averages, is where any flood discount can land.

Day one numbers already show two different crops

Ohio scouts averaged 180.18 bushels per acre on 117 corn samples. That sits 3 percent under the 2025 tour figure of 185.69 and 2.2 percent under the three-year average of 184.31. Soybean pod counts in a 3-by-3-foot square came in at roughly 1,197, down about 7 percent from last year.

South Dakota told a harsher story. Corn averaged 149.09 bushels on 94 samples, off 14.4 percent from 174.18 a year ago and 8.4 percent from the three-year mark of 162.7. Pod counts fell to 945.98, a 20 percent drop from 2025.

Preliminary route notes matched the final day-one releases. Eastern teams walked mud and night crawlers. Western stops found heat-stressed stalks with no viable ears in spots and pollination gaps after hot nights.

The sample counts alone already frame the split. Ohio’s corn print is only a few bushels off its recent tour baseline. South Dakota’s is a double-digit percentage cut on both the year-ago and three-year comparisons. Pod counts widen that gap further: a modest 7 percent soft spot in Ohio against a 20 percent collapse in South Dakota.

Those two states do not define the national crop. They do show why a single belt-wide average would mislead anyone reading only the first night’s tape.

The counts stop short of the real flood hit

Jim Wiesemeyer of Ag Bull Media put the central tension plainly before the tour started. The drowned roots, denitrified nitrogen and lodged corn that dominated weekend field reports express themselves in kernel depth and test weight over the next two to three weeks. They do not show up in the ear counts scouts collect Monday and Tuesday.

State results stay mechanical. Ear count times grain length times kernel rows over row width. No haircut for stress. No adjustment for what a field will look like at harvest. Pro Farmer is explicit that its Friday national number is a Pro Farmer estimate, not a pure tour average. It folds in maturity, acreage tweaks, areas outside the routes, historical tour-versus-USDA gaps and other factors, and it comes out as a range. That is the only place a legitimate flood discount can appear.

The tour will not resolve that argument this week. It will, however, produce the first hand-measured evidence of whether the ear counts and kernel rows support the number USDA is carrying.

Wiesemeyer said that before scouts rolled out of Columbus and Sioux Falls. Day-one results already illustrate the gap between what the sticks measure now and what the crop can still lose.

Kernel depth and test weight are late-season traits. Ear counts and row counts are mid-season architecture. When roots sit in water or nitrogen washes away, the plant can still hold a full ear count while the grain that fills those ears thins out. That is why Monday and Tuesday arithmetic can look steady even as harvest quality erodes.

Lodging adds another layer the formula ignores. A lodged plant may still yield a measurable ear in the plot. At harvest it may not make the combine the same way. The sticks record presence. They do not record recovery.

USDA’s August numbers set the bar the tour walks into

The Aug. 12 Crop Production report locked in a national corn yield of USDA August corn yield of 180.7 bushels per acre on 88.592 million harvested acres for 16.013 billion bushels. Soybeans came in at 52.7 bushels for a record 4.519 billion bushels.

• Corn yield: 180.7 bpa, down 2.3 from July and 5.8 under last year’s record.
• Corn production: 16.013 billion bushels, second-largest on the books after acreage rose.
• Soybean yield: 52.7 bpa, off 0.3 from July.
• Condition: Corn 61% good-to-excellent as of mid-August, 11 points under a year earlier; soybeans near 62%.

Iowa still carried a 78% good-to-excellent corn rating in recent weeks while South Dakota sat near 45%. The national figure hides that spread. Private models heading into the report sat in a roughly 4.5-bushel band around USDA. DTN’s digital tour, locked to an Aug. 1 snapshot before the worst rains, ran below USDA in six of the seven tour states, including every eastern leg stop.

The tour now walks into that bar with fresh ground truth. USDA’s 180.7 corn yield and 52.7 soybean yield are the benchmarks every nightly average will be stacked against, even though those nightly prints are not national forecasts. Production at 16.013 billion bushels already ranks as the second-largest on the books. Any material cut to yield still leaves a large crop unless acreage shifts too.

Condition ratings already sketched the same east-west contrast the scouts are measuring by hand. A national 61 percent good-to-excellent reading for corn masks Iowa’s still-strong 78 percent and South Dakota’s near-45 percent. The tour’s job is to turn those rating gaps into ear and pod math.

How the scouts actually take the samples

The method has stayed constant for a reason. Year-to-year comparison is the product. Teams do not pre-select pretty or ugly fields. They walk 35 paces off the road, then work a fixed plot.

• Corn: measure row spacing, count ears in 30 feet of two rows, pull three ears, average grain length and kernel rows around, compute yield.
• Soybeans: count plants in three feet, pick three plants, count every pod a quarter-inch or larger, scale to a 3-by-3 square, note moisture and stage.
• Flooded but still harvestable ground gets measured; a drowned-out zero stays a zero. Prevent-plant acres drop out of the production math.

Seven states cover about 70% of U.S. corn and soybean output. Eastern leg: Ohio, Indiana, Illinois, eastern Iowa into Minnesota. Western leg: South Dakota, Nebraska, western Iowa into Minnesota. Both converge in Rochester Thursday night. The same sampling procedure since the 1990s is the entire point of the exercise.

Consistency is what makes a soft Ohio print or a sharp South Dakota cut readable against last year and the three-year average. Change the pacing rule or the ear-pull count and the history breaks. Leave the method fixed and the only moving parts are the crop and the weather that shaped it.

The drowned-out zero rule matters in a flood year. Ground that will not be harvested does not get smoothed into a polite low number. It registers as zero in the plot and leaves prevent-plant acres outside the production math entirely. That keeps the tour average honest about lost ground without pretending every wet field is gone.

The tour week builds state by state

Day one delivered only the bookends: Ohio on the eastern leg and South Dakota on the western leg. The middle of the map still has to walk. Each night adds weight to the same mechanical formulas, and none of those nights rewrite the Friday judgment layer.

1. Monday: Ohio and South Dakota averages released; eastern mud and western heat stress already visible in the notes.
2. Tuesday: Indiana and Nebraska routes; more eastern belt corn and a deeper cut into western dryness.
3. Wednesday: Illinois and western Iowa; the heart of national production share comes into the sample set.
4. Thursday: Minnesota and the Rochester convergence; both legs finish and the full tour dataset closes.
5. Friday, 1:30 p.m. CT: Pro Farmer national corn and soybean production range; maturity, moisture, non-tour acres and history enter the estimate.

Illinois and Iowa carry outsized weight inside that sequence because the seven tour states together cover about 70 percent of U.S. corn and soybean output. A soft Indiana print moves the story. A soft Illinois print moves the math. Traders know the calendar as well as the scouts do.

The eastern leg runs Ohio, Indiana, Illinois, and eastern Iowa into Minnesota. The western leg runs South Dakota, Nebraska, and western Iowa into Minnesota. Iowa’s split across both legs is deliberate. It keeps one of the largest producing states from landing entirely on one weather story.

Friday’s range carries the judgment call markets need

Nightly state numbers are arithmetic averages of what scouts physically counted. The Friday release at 1:30 p.m. CT is different. Pro Farmer weighs maturity, soil moisture, disease pressure, non-tour acres and the long-run gap between tour data and final USDA yields. Historical work from 2003 onward shows the tour corn estimate has averaged within 0.31 bushels of the September NASS figure and about 2 bushels of the final January number. Soybeans run even tighter.

That track record is why the range, not Monday’s Ohio or South Dakota print, tends to move December corn and November soybeans. Futures already firmed into the tour open on weather headlines. November soybeans pushed above $12 and December corn tagged three-week highs near $4.90 as the eastern flood corridor and western heat stress shared the tape. Traders are not waiting for every ear count to finish; they are pricing the chance that final fill falls short of the ear potential scouts are recording now.

The judgment layer is also where acreage tweaks and off-route areas can pull the national range away from a simple average of seven state tours. A route can miss a pocket of drowned ground or a pocket of rescued crop. Pro Farmer’s range is built to acknowledge that, which is why the firm is explicit that Friday’s number is an estimate rather than a pure tour mean.

Historical tightness to NASS is the market’s comfort with that process. An average miss of 0.31 bushels against the September figure is small relative to the weather swings now on the table. The larger gap to the final January number, about 2 bushels on corn, still leaves room for late-season surprise. That is exactly the window Wiesemeyer flagged for kernel depth and test weight.

Markets price fill risk ahead of the counts

Price action into the open already treated the tour as a fill story, not only a stand-count story. November soybeans above $12 and December corn near $4.90 on three-week highs reflect that bid. The tape was reacting to the same weekend field reports the scouts are now turning into ear and pod numbers.

Two risks share that premium. In the east, record rains raise the odds that ear potential does not become harvestable grain at full depth. In the west, drought and hot nights raise the odds that early dent and pollination gaps have already capped what fill can do. Day-one notes hit both themes: mud and night crawlers on one leg, heat-stressed stalks and missing ears on the other.

• Eastern bid driver: flood damage that shows up late in test weight and kernel depth rather than in Monday ear counts.
• Western bid driver: heat stress and pollination gaps already visible in stand quality and barren spots.
• Shared market question: whether Friday’s range cuts under USDA’s 180.7 corn and 52.7 soybean marks enough to keep the weather premium alive.

If the range largely confirms USDA after the judgment layer, that premium can unwind quickly. If it lands materially under those marks, the path higher is already sketched in the futures that firmed before the first sample bags were logged. Either way, the nightly state averages remain inputs. They are not the decision.

What the next weather window decides for fill

Eastern fields need sun and moderate temperatures for the next 45 to 60 days. Scouts already flagged immature corn, lower-leaf nutrient stress from excess water, and the risk that dough-to-early-dent stages lose kernel depth if roots stay compromised. Western soybeans looked cleaner and more resilient after late rains, but corn that dented early under heat has less room left.

Tour days continue Tuesday through Indiana and Nebraska, Wednesday through Illinois and western Iowa, Thursday into Minnesota. Each evening’s state average will add another data point. None of them will capture the test-weight loss still to come. The Friday range is built to do that work. If it lands materially under the 180.7 bushel USDA corn mark or the 52.7 soybean figure, the market already has a path higher on the books. If it largely confirms USDA after the judgment layer, the weather premium that lifted prices into the tour can unwind just as fast.

The calendar and the crop stage are now pulling in the same direction. Immature eastern corn still has time to add or lose bulk. Early-dent western corn does not. Soybean pod counts from day one already diverge by region, and western beans that looked cleaner still have to finish against whatever heat returns.

Private models before the August report sat in a roughly 4.5-bushel band around USDA, and DTN’s digital tour ran below USDA in six of seven tour states on an Aug. 1 snapshot. The ground tour is the hand-measured check on whether those softer digital reads, and the flood reports that came after them, hold up once maturity and moisture are folded in.

Scouts will keep walking. The numbers that matter most will arrive after they stop.