15:1615:16, 13 July 2016diffhist+3,058
Topsoil
Added British Standard compliance requirements and reference to subsoil and topsoil standards. Also information on the Carbon:Nitrogen ratio and its relative importance to the crop.
15:1615:16, 13 July 2016diffhist+3,058
Topsoil
Added British Standard compliance requirements and reference to subsoil and topsoil standards. Also information on the Carbon:Nitrogen ratio and its relative importance to the crop.