Step 01
Match the comparison before subtracting
In Crop Tracker, select corn, the relevant geographic level, metric and reporting period. Compare equivalent stages across years and retain the source release date. The teaching values use one matched week; a current date on your computer does not establish the date of the latest report.
Step 02
Read progress in percentage points
Planting at 65% versus a 50% five-year average is a lead of 15 percentage points. The difference from the previous year’s 55% is 10 points. These are percentage-point differences, not statements that planting is 15% or 10% higher on a relative basis. Planting progress describes the share planted.
Step 03
Read condition as a separate distribution
Good plus excellent is 50% + 18% = 68% in the example current year and 53% + 19% = 72% previously. That is a 4-percentage-point decrease. The complete five-category distribution matters: the good-plus-excellent total does not show whether the other acres are fair, poor or very poor.
Step 04
Keep the conclusion at the reported scale
The example supports two separate observations about the fictional state: faster planting pace and a lower favorable-condition share. It supplies no final yield estimate, causal explanation or measurement of a particular farm. Missing or unpublished values remain missing; they are not replaced with zero.
Take it to your own plan
Preserve the crop, geography, metric, reporting week and source date. Progress, condition and yield are different pieces of information.
Sources and further reading
The sources explain methods and context. They do not supply the hypothetical prices, forecasts or crop percentages used here.