Huge reductions in emissions can be achieved by fitting impermeable covers over slurry storage – as much as 80% on an above-ground tank and 50-60% by permeable floating materials, according to ...

The nutrient value of organic manures (cattle slurry and manure, pig slurry, poultry litter and increasingly anaerobic digestate) can be highly variable. The variation is due to the type of livestock, ...