Sorry but it doesn't work that way anymore. If you don't have the exact formulation you'll either burn or you won't produce. It's very very exact.petros, sh1t, crap or any other form of waste also known as manure, is already properly formulated. It has been so for thousands, if not millions of years. It is BIODEGRADABLE. It is sustenance and food for the soil as it has been for the last few thousands of years.
Only since government regulators dabbled into something they knew nothing about it changed in order to placate politically correct softies.
You can't. Not without ditching todays' bio engineered crops. That means an instant 50% in yields gone and another 50% of land taken out of production to do rotations and even far more State funding Comrade Tonnington.So, the question you're really asking is how can someone return to integrated farming, but still meet the needs of a modern chemical feedstock dominated agri-business.
The answer is the system needs to change.
Those days died 25 years ago.