Composting: Farm Waste to Fertility
What You’ll Learn
Mix green (nitrogen-rich) and brown (carbon-rich) materials at a 1:2 ratio for efficient decomposition.
Turn your compost pile every 2 to 3 weeks to let in fresh oxygen and keep the process moving.
Ready compost is dark, crumbly, and smells earthy — those three signs tell you it is time to apply.
Why Compost?
Composting turns the waste your farm already produces into a powerful soil improver — at zero cost. It cuts your reliance on expensive chemical fertilisers while building better soil structure and water retention. Every farm generates more than enough organic waste to produce meaningful compost each season.
Building Your Compost Pile
Combine green materials (fresh crop residues, kitchen scraps, animal manure) with brown materials (dry leaves, straw, maize stalks) at a ratio of 1 part green to 2 parts brown. Layer everything and moisten each layer until it feels like a wrung-out sponge. A pile at least 1 metre wide and 1 metre tall will generate enough internal heat to decompose well.
Managing the Process
Turn the pile every 2 to 3 weeks with a fork to bring in fresh oxygen. The centre should feel hot to the touch during active decomposition — that heat is a good sign. If it smells unpleasant, add more brown material and turn it. Your compost will typically be ready in 3 to 4 months.
Applying Compost
Apply 5 to 10 tonnes of finished compost per hectare before planting. Spread it evenly and work it into the top 15 cm of soil during land preparation. Well-made compost releases nutrients slowly across the growing season, feeding your crops steadily rather than all at once.