Jiànzuò shì yī zhǒng chuántǒng de gēngzuò fāngshì.
Intercropping is a traditional farming method.
Tips
usage
Note 间 here is jiàn ('between, alternating'), not jiān ('space'). Same character, different reading and meaning. Closely related: 套种 (tàozhòng, relay-cropping), 轮作 (lúnzuò, crop rotation).