*2.1. Agronomic Process Based on Peanut Two-Stage Harvesting Operation Mode*

Two-stage harvesting is the operation process of using more than two machines to complete the digging of peanuts, the separation of pod soil, laying and drying, picking up pods, and other working conditions. There are mainly three operation modes: first, after the peanuts are dug and laid by the digging and harvesting machine, they are artificially dried in the field, and finally they are collected and harvested together, namely "Digging–Separation of soil from peanut pods–Laying–Field drying–Tiling–Pickup combined harvesting." Second, after the digging and laying of peanuts by the digging and harvesting machine, the peanuts are picked up manually and taken to the drying field and other places for centralized drying. Finally, the dried pods are picked by the pod picking machine, namely: "Digging–Separation of soil from peanut pods–Laying–Manual pickup–Dry in the sun or pile up-Pick the dried pod." Three is the peanut after digging and harvesting by machine in a digging shop, artificial pick-up after the use of machinery, or artificial fresh pod picking, which is "Digging–Separation of soil from peanut pods–Laying– Manual pickup–Pick pod from fresh plants" [33,34]. The agronomic process of a specific peanut under the two-stage operation mode is shown in Figure 1.

**Figure 1.** Agronomic process of peanut in two-stage operation mode.
