一、效益概念效益即是效果,简言之,有用效果与取得该效果所消耗的劳动(包括物资)之比,前者越大,效益越好。效益按投资回收年限长短,可分为三类:一般在一年内收回投资的称为短程效益,在农林业中如农作物等。一年以上,五年以下收回投资的称中程效 First, the concept of benefit Benefit is the effect, in short, the useful effect and the effect of the labor consumed (including supplies) ratio, the greater the former, the better the benefits. Benefit According to the length of investment recovery period, can be divided into three categories: generally within a year to recover the investment called short-term benefits, such as agriculture and forestry, such as crops. More than one year, five years to recover the investment, said the medium-term effect