When the leaves are stopped and the back of the leaves is slightly red, the pods are mature. When most leaves of the plant are green, they can harvest tender leeks because they are not suitable for draining water and easy to excavate the tender leeks. They must be hand-harvested; after the leaves are yellow, the old pods are harvested, and the fields are drained before harvesting and they are picked out with shovels; Deep-water lake pond, more use of iron hooks. After the leaves and the end leaves are located below the straight line.
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