例如，沼泽贫瘠的土壤提供的氮和磷很少，所以肉食植物比那些通过更传统的方式获得这些营养的植物更有优势。
The poor soil of bogs, for example, offers little nitrogen and phosphorus, so carnivorous plants enjoy an advantage over plants that obtain these nutrients by more conventional means.
产量不断增加，害虫得到控制，贫瘠的土壤也补充了肥料。
Yields were rising, pests appeared under control and fertilisers were replenishing tired soil.
贫瘠的土壤、崎岖的地表以及恶劣的气候造成典型的生存性农业，仅能种植维持农场家庭生存所必需的作物。
Poor soils, uneven terrain, and a severe climate led to typical "subsistence" farming, the growth of only those crops necessary for family maintenance.
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