The major metal minerals recycled include tantalum niobite, fine spar, tantalum aeschynite, wolframite and scheelite, which have large density of generally 5 to 7.
Recycled fibre: Secondary fibre from retree, broke or other pager waste as opposed to virgin fibre from trees. Also called Recovered fibres,Secondary fibres.
The content of the available ferrum enhanced by recycled straws, but that of the available zincum, copper and manganese had no changed obviously in soil.