: Using waste products like biogas digestate and wood ash can be an efficient disposal method and an environmentally friendly alternative to mineral fertilizers, especially for acidic soils. Challenges Identified in the Research
Waste-Derived Fertilizers: Conversion Technologies, Circular ... - MDPI Combined Waste Resources as NPK Fertiliser
: The research demonstrates that combining wood ash (as a potassium source) with meat and bone meal (as a nitrogen and phosphorus source) can effectively provide primary nutrients for crops. : Using waste products like biogas digestate and