Why does Ai Qing’s imagery in “The North” not describe land?

Ai Qing wrote about land.

The images in Ai Qing's "North" include land, desert, flute, desert, wild geese, etc.

The image of land has dual connotations in "The North". On the one hand, it embodies the poet's deep love for the motherland, Mother Earth, and on the other hand, it embodies the poet's labor of living on this land. reverence and love.