3 ways to reduce zinc and copper in animal feed

Zinc and copper can be found in high levels in manure, resulting in high levels in soils. This can cause serious concerns for the environment. Want to know how feed measures can reduce this impact? To stop the accumulation of zinc and copper in soils two actions are needed. First, the amount of manure that is spread on fields should be reduced. However, this is not enough to realise a steady state situation in which the supply is equal to the release of zinc and copper. Secondly, to achieve a s