What are the technical measures of multiple cropping technology in ancient China?

Multiple cropping techniques in ancient China included intercropping, interplanting, mixed cropping and continuous cropping. This is the main means to improve the multiple cropping index.

Intercropping refers to planting two or more crops with similar seed period or growth period in the same field, and the plants are spaced, staggered and bordered.

Intercropping in the same field, planting the next crop in rows or strips before the previous crop matures.

Mixed cropping is to mix two different crops in a certain proportion and sow them on a piece of land at the same time.

Continuous cropping is a method of continuously planting the same crop in the same field.