2016年5月,笔者同美国爱荷华州华人协会执行主席、美国十方技术公司的商务总裁燕晓哲先生,驾车从伊利诺伊州出发,穿过密西西比河,沿着有美国“母亲之路”之称的66号公路,开始了在美国的伊利诺伊州、爱荷华州和谌萨斯州等粮食主产区进行农业机械化与保护性耕作技术考察之行。美国第2大粮食产区爱荷华州爱荷华州是此次保护性耕作考察的重点。同我国东北区域黑土带经度纬度地理位置基 May 2016, the author with the American Iowa Chinese Association executive chairman, the United States Shifang technical company business president Mr. Yan Xiaozhe, driving from Illinois, through the Mississippi River, along the United States "Route 66, began a tour of agricultural mechanization and conservation tillage in the major grain-producing areas of the U.S. such as Illinois, Iowa and Chenus. Iowa, the second largest grain producing area in the United States, is the focus of this conservation tillage survey. With the northeastern region of the black soil with longitude and latitude geographic location base