Rain through the Canadian harvest has damaged crops across major growing regions, and farmers and quality assessors are now working through the consequences bushel by bushel.

The immediate task is twofold. Growers must decide what to combine, dry, or leave. Assessors must grade what comes off the field, because wet harvests depress quality grades and, with them, the price per tonne farmers receive.

Why does a wet harvest hit grades so hard?

Prolonged moisture in the field triggers sprouting in cereal heads, staining in oilseeds, and disease in standing crops. Each of those defects pushes a sample down the Canadian grading scale. A crop that would have made No. 1 before the rain can drop one or two grades, cutting the elevator's offer.

For farmers, the arithmetic is unforgiving. Lower grades multiply across entire tonnages. A farm storing several thousand tonnes can lose the equivalent of a household income to a single-grade downgrade, before drying costs are counted.

Drying itself adds expense. Wet grain must reach safe storage moisture before it can sit in a bin without spoiling, and fuel or natural gas for dryers adds a per-tonne cost that comes straight off margin in a year when margins are already thin.

What are assessors doing now?

Canada's grain quality assessors are examining samples to determine how much of the crop retains food-grade quality and how much falls into feed channels. Their verdicts determine export prospects: buyers in overseas markets contract against Canadian grade guarantees, and a poor national showing forces importers to look elsewhere.

The assessments also shape domestic decisions. Feed-grade volumes flooding the market depress feed prices, which helps livestock producers but deepens losses for grain growers who cannot reach milling or export specifications.

What should farmers watch next?

Growers face three practical questions in the weeks ahead: what grade their own samples carry, what their elevators and buyers will accept, and whether crop insurance coverage matches the quality losses rather than yield losses alone.

For the wider market, the number to watch is the Canadian Grain Commission's quality data as it accumulates through the season. Those figures will set the discount structure on Canadian wheat and canola, and will signal whether global buyers reprice Canadian supply or shift sourcing to competing origins.

The next weeks of grading results will determine whether this harvest is remembered as a difficult harvest or an expensive one.

By Olivia Hart, Arable Wire