CCFG Timber Harvesting Workshop 2010

Presented by Professor Dr. Hanns Höfle
12 & 13 May
Stourton Village Hall, Wiltshire



Overview



We were fortunate in having Professor Hanns Höfle to run this 2 day workshop which included indoor presentations, and practical field visits to Fontmell Hill Estate, Stourhead Western Estate and Melbury Estate.

Prof. Hanns Höfle holds an MSc and a PhD in Forestry from the University of Freiburg, and a PhD from the Swiss Federal Institute of Technology in Zurich, and the University of Göttingen. In addition to his distinguished academic career he has considerable practical experience which includes managing the central machine shop of the State Forest Service of Lower Saxony and serving as a Forest District Officer. He acted as chairman of the Joint FAO/ECE/ILO Committee on Forest Technology, Management and Training from 1998 to 2004.

Sadly, Professor Hanns Höfle died in June 2014 whilst trekking in the mountains of Georgia. He was an internationally respected forester and will be greatly missed.

Copies of the Prof. Hanns Höfle's presentations at the workshop can be viewed or downloaded as PDF files below.


Thanks



We would like to thank Canopy Land Use and Selectfor for arranging this seminar. Our thanks also to Sir John Elliot Gardiner and Nicholas and Henry Hoare for allowing us to use their woodlands for the practical work, and to P.J. Cleary (buyers of Hurley Ash) for their generous support.

 

Downloads

 

File
size link
1. Extraction Racks    

or

Download/view whole file:

Download/view in sections:

7.46 mb
  • The situation in Germany (pp.2-6)

590 kb
  • The role of silvicultural concepts (pp.8-14)
2.83 mb
  • Reasons for extraction racks: objectives, effect on soils, effect on growth and yield, negative effects (pp.15-37)
1.57 mb
  • Planning, marking and documentation of extraction racks: stand stability, dimension and alignment of ER, what to do with old ones, planning and marking, documentation (pp.38-62)
1.41 mb
  • Use at time of harvesting (pp.63-69)
145 kb
  • Contracts between forest enterprise and contractors (p.70)
36 kb
  • Maintenance and rehabilitation (pp.71-74)
1.08 mb
  • Reducing soil damage during harvesting (pp.75-76)
41 kb
  • Summary (pp.77-79)
49 kb

 

2. Harvesting Systems

  • Objectives and choice of harvesting systems (pp.2-8)
  • Target diameter harvesting (pp.9-11)
  • Thinning (pp.12-13)
  • Potential harvesting systems: overview (p14)
  • Motor-manual systems, flat terrain & steep terrain (pp.15-44)
  • Contracts between forest enterprise and contractors (p70)
  • Motor-manual systems, flat terrain & steep terrain (pp.15-44)
  • Fully mechanized systems (pp.45-65)
  • What to do with underplanting or advance planting (p.66)
  • Directional felling (pp.68-70)
  • Marking trees (pp.71-74)

 

3.43 mb

 

link

 

3. Costs

  • General remarks (pp.2-6)
  • Fully mechanized harvesting systems (pp.7-11)
  • Motor-manual harvesting systems (pp.12-14)
  • Skidding (pp.15-18)
  • Other costs (pp.19-21)

 

1.42 mb

 

link


*To download the files, right-click on the above links and choose "Save As" to download.




        
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