著名土壤学家、西南农业大学教授侯光炯主持的水田自然免耕技术课题,经过六年多来的试验研究和生产实践,取得了重大科技成果和显著的社会经济效益。四川省科委于1986年7月20日在四川省长宁县召开了有省内外土 The well-known soil scientist Hou Guangjiong, a professor at Southwest Agricultural University, presided over natural tillage technology in paddy fields. After six years of experimental research and production practices, he has made significant scientific and technological achievements and achieved remarkable social and economic benefits. Sichuan Provincial Science and Technology Commission on July 20, 1986 held in Changning County, Sichuan Province, both inside and outside the province