Alternatives to fallow, such as crop rotation and green manures, developed in a number of areas. The earliest record of their use is in Chinese writings from ca. 500 B.C. Discussion of these practices is found in European agricultural publications dating from the 16th century.
Днес четох един документ с исторически сведения за зелено торене (сидерация). 7 стр PDF е. Както винаги, китаецът е векове напред с матряла.