Manure Spreader

A manure spreader is a machine for distributing bulky solid organic materials onto land as a soil amendment and nutrient source. Rear-discharge designs use horizontal or vertical beaters to shred and throw material behind the machine, while side-discharge and disc-type spreaders fling material to one side or in a broad fan.

It is distinct from liquid slurry-handling equipment such as tankers and injectors: the manure spreader is built for material with enough structure to be handled by a moving floor and beaters rather than pumped.

1. Solid manure or compost is loaded into the hopper or bed
2. A moving floor, chain-and-slat conveyor, or auger feeds material toward the discharge
3. Rotating beaters or spinning discs shred the material and fling it across the field
4. Forward speed and feed rate together set the application rate per unit area
5. The spread material is often incorporated afterwards to reduce nutrient loss and odour

Manure spreading closes part of the nutrient loop on farms that keep livestock, returning nutrients taken up in feed and forage back to cropland while building soil organic matter. Because manure nutrient content varies with animal type, bedding, and storage, accurate use generally relies on manure analysis and calibration rather than assumed values.

Achieving an even spread pattern and a known rate requires matching beater or disc speed, floor feed rate, and forward speed to the material, and periodic calibration by weighing or measuring output. Field traffic with a loaded spreader is heavy, so working conditions are chosen to limit soil compaction.