Albert Barnes Commentary Job 39:6

"Whose home I have made the wilderness, And the salt land his dwelling-place?" — Job 39:6 (ASV)

Whose house I have made - God had appointed its home in the desert.

And the barren land his dwellings - Margin, as in Hebrew “salt places.” Such places were usually barren. (Psalms 107:34), he turneth a fruitful land into barrenness. Hebrew “saltness.” Thus, Virgil, Georgics 2:238-240:

Salsa autem tellus, et quae perhibetur amara.
Frugibus infelix: ea nec mansuescit arando;
Nec Baccho genus, aut pomis sua nomina servat.

Compare Pliny, Natural History 31:7; (Deuteronomy 29:23).