他也提出原材料可以种植在不适合生产粮食的边际耕地上。
He also suggests that raw materials could be grown on marginal land which is unsuitable for food production.
So, marginal land is brought into play with hard work and ingenuity, and this is one of the things that Hanson emphasizes that is so helpful.
那么,边际耕地需要,在一定的生产条件下,生产收益正好足以补偿所需费用的土地,这就是汉森所强调的相当有益的一点
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