《犁的纪念碑》要求一三角状地块，每边宽一英里，以轮种方式在每个边种植季节性作物。
"Monument to the Plow" called for a triangular site a mile wide on each side to be planted with seasonal crops on rotation.
其他增大土壤肥力的策略包括作物肥田(亦作“绿肥”)、轮种和堆肥。
Other organic tactics for boosting soil quality include cover crops (aka "green manure"), crop rotation and composting.
土豆是一种良好的营养来源，而且农民可以将它与谷类作物轮种。
Potatoes are a good source of nutrients. And farmers can plant them in rotation with grain crops.
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