Sustainable P-enriched biochar-compost production: harnessing the prospects of maize stover and groundnut husk in Ghana’s Guinea Savanna

Farmers in resource-poor areas of the Guinea Savanna zone Ghana often face declining soil fertility due to continuous removal nutrient-rich harvested produce from their fields. This study focuses on Lawra Municipality Ghana, where low fertility, specifically, limits phosphorus (P) bioavailability and hinders crop production. The objective this research is formulate P-enhanced biochar-compost maize stover (MS) groundnut husk, which abound area, close nutrient loop. MS was co-composted with husk biochar at varying rates 0, 10, 20, 30, 40% by volume. To facilitate decomposition using windrow system, composting heaps were inoculated decomposing cow dung, moisture content kept 60% throughout monitoring period. addition shortened lag phase composting. However, above 20% resulted reduced degradation MS. Biochar incorporation enriched available final compost 286.7 mg kg −1 non-biochar-compost 320, 370, 546, 840.0 biochar-compost, respectively.