由于研究而得来的每一项增产, 激励着农民实行更集约的栽培.With each yield increase due to research, farmers were stimulated to practice more intensive culture.在集约的草地管理中,氮肥必须是合理使用的一种手段,而不是一种嗜好.Fertiliser nitrogen must be a sensibly used tool and not ...