Guinea pig manure

Optimal 30 t/ha Biochar Rate Boosts Vegetable Growth, Yield Prediction Hits R2=0.94
Boosting Acidic Soils: Guinea Pig Manure Biochar Offers 9.07 pH, Costs 231.23 Soles/Ton, and Yields 3,515.31 Soles/Ton in Market Value