“If I discover a manure which will enable me to make a piece of land produce 20 per cent more corn, I may withdraw at least a portion of my capital from the most unproductive part of my farm.”

—  David Ricardo

Source: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter II, On Rent, p. 43

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David Ricardo 37
British political economist, broker and politician 1772–1823

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