Data Methodology & Sources
Data Methodology & Sources
Every figure on our agricultural price, trade and production pages is compiled from official, publicly reported data — sourced, dated, and never presented as an estimate where an observed value is implied. This page explains where each figure comes from and how it is processed.
Our insights pages combine three authoritative datasets — international trade and tariff classifications from the United Nations, agricultural production statistics from the Food and Agriculture Organization (FAO), and crop harvest calendars from FAO's Global Information and Early Warning System. Each source below is linked to its official portal.
UN Comtrade
Annual import and export values, volumes, world rankings and the Harmonized System (HS) classification used to compile each product's trade figures come from the United Nations International Trade Statistics Database (UN Comtrade). We derive unit values (US$/kg) directly from reported value and quantity, and present figures from 2020 onward.
Visit UN ComtradeFAOSTAT (FAO)
Production volumes, area harvested and yields are sourced from FAOSTAT, the statistics division of the Food and Agriculture Organization of the United Nations. These are official figures reported by national statistical authorities and compiled by FAO.
Visit FAOSTATFAO GIEWS Crop Calendar
Country-specific harvest windows — shown only where a country actually produces the crop — are derived from the FAO Global Information and Early Warning System (GIEWS) Crop Calendar, which records sowing and harvesting periods per agro-ecological zone. We collapse each producing country's zones into its main (peak) harvest months.
Visit FAO GIEWSHow the figures are processed
Sourced & dated
Every value carries its source and observation date. Sections with no credible data are omitted rather than filled with estimates — we never present a modelled or inferred number as an observed price.
Units & currencies
Prices are normalised to a canonical unit per product (typically US$ per kilogram), with local-currency and customary-unit equivalents shown where relevant. Unit values are computed from officially reported trade value and quantity.
Consensus & benchmarks
Where multiple sources report a price for the same product and country, we reconcile them into a single consensus figure and, where helpful, show a global benchmark for context.
All underlying data is the property of its respective source and is reproduced here for reference under each provider's terms. Figures are official reported values; Selina Wamucii does not alter the source data beyond unit normalisation and the consensus reconciliation described above.