So plants could be packed tighter, doubling yield per acre, and multiple layers of dwarf crops could be grown per floor.
这样一来，植株就可以排列的更为紧密，每英亩产量也随之翻番，每一层楼内都可以种好几排矮株作物。
Most crops, Dr Wilcove suspects, are pollinated by multiple species, and so there might be room for one pollinator to be replaced by another.
大多数作物，威尔科夫博士猜测，有多个授粉品种，因此可能存在着一个授粉者被另一个所取代的余地。
Monoculture practices can incorporate multiple cropping systems by using rotations, borders, and cover crops.
单一做法，可以将复种轮作系统的使用，边界，覆盖作物。
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