A chart should show its workings.

1. Select a consistent price basis.

   Use observed records with source-listed status, positive full cash asking price and positive acreage, observed within 30 days. Exclude auctions, leases, down payments, closed/sold records, demonstrations and owner submissions.

2. Group only established parcel identities.

   Use an existing exact parcel identifier to group duplicates and retain the lowest total cash offer. Records without confirmed identity remain separate; no address or acreage similarity creates a match.

3. Calculate the ratio for each retained offer.

   Asking price per acre = full cash asking price ÷ listed acres. The median is the middle of sorted offering-level ratios, averaging the central pair for an even count. It is not total price divided by total acreage.

4. Keep sample size beside the answer.

   Show count, source coverage, minimum, median and maximum. County pages require at least three recent eligible observations; this is a publishing threshold, not statistical proof of a representative sample.

5. Record only observed history.

   For each UTC day, select each listing’s last observation and then test eligibility. Do not fill missing days or carry listings forward. An observed sold status cannot resurrect that day’s earlier cash offer.

6. Keep uncertainty in the decision.

   Differences in location, improvements, usable area, access and rights are not automatically adjusted. A low acre price is a screening result; property valuation requires reviewed local sale evidence.

Benchmark records preserve year, geography, metric, value status, report URL, table, page and notes. Current asking-price exports preserve the original source and full cash price. History exports record how many listings were actually observed and how many qualified. Public facts and source links do not grant rights to republish a publisher’s photographs or marketing text.