Cite Supply topic
Calculators, benchmarks and interactive tools made for practical use.
Interactive calculators and benchmarks can make an article more useful, but only when readers can understand the inputs, result and limitations. This topic groups practical tools whose public pages expose their source identity, freshness and reviewed usage conditions before a publisher copies an embed.
Some tools are hosted by their original creator; others use a Cite Supply-rendered presentation of reviewed source data. The asset page labels that distinction and disables embed actions when the evidence does not permit them. Always test an interactive tool in the context where it will appear.
Reviewed catalog
Agricultural value added per worker is calculated by dividing the amount of economic value generated from farming, forestry and fishing by the number of people who work in these sectors. This data is expressed in US dollars. It is adjusted for inflation but does not account for differences in living costs between countries.
Arable land needed to produce a fixed quantity of crops is calculated as arable land divided by the crop production index (PIN). The crop production index (PIN) here is the sum of crop commodities (minus crops used for animal feed), weighted by commodity prices. This is measured as an index relative to 1961 (where 1961 = 1).
