犁体外载,系指犁在耕作过程中,土壤施加于犁体上的作用力。土壤对犁体曲面的阻力是一个复杂的空间力系,这力系的合力,即土垡对犁作曲面的总阻力。至今,还没查到犁在特定使用条件下,用理论计算出比较系统、完整的犁体外载资料。国内外通常都用试验方法测定,在一 Plow body load, refers to the plowing in the farming process, the soil exerted on the plow body force. The resistance of the soil to the surface of the plow body is a complex space force system, the resultant force of which is the total resistance of the soil surface to the plow. Up to now, no specific information has been found about the plow body outside the plow under the specific conditions of use. Test methods are usually used at home and abroad, in one