 To survive, us humans and all other life on the physical plane, we need to build up and feed humus. Humus is enormously hungry. If you see a herd of animals on a piece of land, you're aware you have to feed them, carry hay and other fodder and the same soil where you have to feed the goats, the cows or whatever, underground if this soil is healthy there is another herd of animals and it's just as hungry and it needs a big amount of food and this food can be anything from compost, degraded organic matter, degrading rotting wood and other material, okay, is that understandable? It's the herd below the ground needs to be fed, if it's not fed it will die off gradually and that's what is happening in industrial agriculture. If you only add mineral fertilizer, this doesn't feed humus, to the contrary it's destroying earthworms and other earth life and we need organic matter, we need carbon in the soil.