4 treff

Reducing pesticide use in forestry : Forestry Commission practice guide
Ian Willoughby
Bok Engelsk 2004
Weed control in Christmas tree plantations
Ian Willoughby and Colin Palmer
Bok Engelsk 1997
Herbicides for farm woodlands and short rotation coppice
by Ian Willoughby and David Clay
Bok Engelsk 1996
The use of herbicides in the forest 1995
by Ian Willoughby and Jim Dewar
Bok Engelsk 1995