日本福冈县桂川町的吉野先生，有水田 30亩， 20余年来一直坚持无农药栽培，实行水田、旱田轮作，耕地的单位面积产量逐年提高，形成了良性循环的栽培体系。在 30亩水田中， 1/3栽培蔬菜， 2/3种植水稻 (稻田中养鸭 )，稻田改成旱田栽培 3年蔬菜后，再改植水稻，可使水稻、蔬菜 Yoshino of Katsuragawa Town, Fukuoka Prefecture, Japan has 30 acres of paddy field. For more than 20 years, he has persisted in pesticide-free cultivation. The paddy field and field rotation have been implemented. The yield per unit area of ​​cultivated land has been increased year by year, forming a virtuous circle cultivation system. In 30 acres of paddy fields, 1/3 of cultivated vegetables, 2/3 of planting rice (ducks in the paddy), paddy fields into 3-year cultivation of dry vegetables, and then transplanted rice, rice, vegetables