This dimension groups crops by the era in which they were first domesticated. Wikipedia notes that "agriculture developed in some 13 centres around the world, domesticating different crops and animals" across many different periods. Browsing by domestication era lets a visitor compare crops first grown in the same period.
Facts
Comparison
Primary Plant Part Harvested Era (Domesticated When)
Filter Results3 entries
Sources
1. Wikipedia: Vegetable oil (oil crops)
WikipediaOil crop (vegetable oil), lead sectionQuote, Oil crop (vegetable oil), lead section
Most, but not all vegetable oils are extracted from the fruits or seeds of plants.
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