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Organic farming - Wikipedia
Organic Farming: History, Timeline, and Impact - Treehugger
Organic FAQs - Organic Farming Research Foundation
Organic farming | Definition, History, Methods, Practices, & Benefits
USDA Organic | USDA
Organic food | Definition, Policies, & Impacts | Britannica
Organic Agriculture - USDA ERS
Organic Farming 101: Methods and Benefits - The Farming Insider
Organic Farming | US EPA - U.S. Environmental Protection Agency
What is organic? - Soil Association