What are the poems describing the prosperity and decline of vegetation?

grass in the poem

1. The sky is grey and wild, and the wind blows grass and cattle and sheep are low. (Chile Song)

2. boundless grasses over the plain, come and go with every season. (Bai Juyi:

3. though a country be sundered, hills and rivers endure, and spring comes green again to trees and grasses. (Du Fu: "Spring Hope")

4. but how much love has the inch-long grass, who won three Chunhui. (Meng Jiao: The Wandering Sons)

5. the woods are black and a wind assails the grasses, yet the general tries night archery. (Lu Lun: "Sai Xia Qu")