Can the Demon Lord Not Be Able to Farm?

The Nine Nether Demon Realm has been barren for eternity, with no grass growing. The monks here survive by devouring each other's spiritual power, and the Demon Realm is the most forgotten corner of the world of cultivation. And I, the new Demon Lord, can only farm. No spiritual veins? I use blood thunder to fix nitrogen. No spiritual seed? I led my troops to "procure" in the human world. No manpower? I organized all those rebellious demon generals into the "Lingtian Operation Corps". One day, the price of food in the entire cultivation world will change because of me.