宗教节日必须在一年中恰当的时间举行，农作物也必须在适当的时间种植。
Religious festivals had to be held at the right time of year, crops needed to be planted at the right time as well.
一片庄稼地在昆虫啃食粮食作物的时候会发光，这样就让灭虫剂在适当的时候才被使用。
A field would glow in areas where insects were attacking the crops, allowing insecticides to be deployed appropriately.
如果作物没有适当轮替，土壤中的养分会耗尽，几年后就什么东西也种不出来了。
If crops are not rotated properly, nutrients in the soil are stripped out, and nothing can be grown for several years.
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