1. Copper Cycle Harvest Plant residue Hydrous oxides & carbonates
Cu additives in feed
Copper Cycle
Harvest
Plant residue
Hydrous oxides & carbonates
Parent material
Soil Solution: Cu2+ and soluble Cu
Fertilizers,
fungicides,
atmospheric
deposition
Microbes
Organo-metallic complexes
Microbial residue
Weathering
Adsorption pH > 7
Desorption pH < 6
Precipitation
Dissolution
Complextion pH > 6
Release pH <6
Clay & OM
Soluble Cu2+
& chelated Cu
(under extreme conditions)
Leaching
Toxic to sheep when Cu: Mo ratio > 10:1
Sewage sludge
Animal waste
Mining