一いち毛もう作さく

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Meanings

1

noun

single crop; monoculture

Refers to cultivating only one type of crop on a given piece of land, often contrasted with multiple cropping or crop rotation.

二に毛もう作さく
二毛作 means double cropping, i.e., growing two different crops on the same land within a year, whereas 一毛作 refers to growing only one.
輪りん作さく
輪作 is crop rotation, which involves changing the type of crop grown in a field over seasons or years, while 一毛作 implies no such rotation.

Compound of 一 (one) + 毛 (crop, from 毛作 meaning cultivation) + 作 (cultivate). The term is a straightforward Sino-Japanese formation.