三、一种可变生产要素合理投入的确定 Factor-product- product price change Total Cost Less fertilisers used Marginal Cost 一米 Total revenue Marginal Revenue +- Total Revenue 2 Marginal Revenue 2 Kg of fertiliser三、一种可变生产要素合理投入的确定 Factor-product - product price change -?0 ? ?0 ?0 ?0 ?0 ?00 ?20 ?40 ?60 ?80 0 20 40 60 80 100 120 140 160 180 200 220 240 Kg of fertiliser ?per ha Total Cost Marginal Cost Total Revenue Marginal Revenue Total Revenue 2 Marginal Revenue 2 Less fertiliseris used