Official website of the New Zealand Farm Forestry Association

Tenco logo
About Tenco
Tenco is one of New Zealand’s largest exporters of forest products. We have built to this position since 1991 when the company was set up to export lumber to growing Asian export markets.  Experience and reputation count; from small beginnings Tenco has become the largest independent exporter of New Zealand lumber and New Zealand’s 4th largest log exporter.  Tenco has a regular shipping program of their own log vessels and in combination with these and other ships currently calls  at 7 New Zealand ports (5 North Island and 2 South Island).
Tenco buys standing forests.  Tenco currently has a number of forests which they purchased at harvestable age to log over a number of years for export and domestic markets.  Tenco also regularly buys smaller tracts of forest to harvest immediately or immature forests to hold until harvest time.  Tenco is interested in broadening  the  base of owners from whom it purchases forests and stands of trees.  A deal with Tenco is a certain transaction.  The owner and Tenco will agree on a value of the tree crop and then Tenco will pay this amount to the owner either in a lump sum amount or on rate per volume unit out-turn from the forest depending on the nature of the tree crop.
Tenco knows there are a lot of farmers who have trees that are close or ready to harvest and will be asking themselves how they should proceed with the sale of their trees.  For some farmers the kind of certain transaction with money in the bank could well be appealing. Tenco is actively interested in buying harvestable forests or trees from areas including all the North Island (except the Gisborne and East Coast districts) and Nelson & Marlborough in the South Island .
If you own a forest in this area (16 years and older) and are ready to enter into this kind of agreement Tenco is interested to develop something with you.
Please contact: 
Work: +64 7 357 5356  Mobile:  +64 21 921 595

Steepland harvesting in Northland

Tuesday, June 26, 2018, Dean Satchell's blog

Innovation always interests me. Some innovations become lost to time while others become the next step in evolution and lead to greater things. Often they are just a minor tweak to the existing art, a fine tuning exercise, while sometimes they are grand, a big step change, a complete rethink that is revolutionary. What I enjoy the most when I see innovation in action is experiencing that eureka moment where I think "wow, I wish I'd thought of that"!

Innovators also interest me. Innovators search for the best way of doing things. For Peter Davies-Colley that search is not out of self-interest, but for the collective interest of the forest industry. He is thinking about how we can harvest better, and putting his ideas into practice. Someone needs to lead the way because harvesting is the bit we as an industry don't always do well. Doing better means less damage to the adjacent conservation areas, it means less damage to the soil and it means less sediment entering our waterways.

Peter has been commercially harvesting small blocks for farm foresters in Northland for more than a decade and has developed a good understanding of the problems we face. The solutions he has been developing are innovative and exciting. The thing about harvesting on steeplands is that not only should it be managed to cause as little environmental damage as possible, but somehow it also needs to be done cost-efficiently... and usually on a small scale to boot.

Then there is the distance these small blocks are from the nearest road. They were usually planted out the back of the farm on the steep stuff no good for anything else. Peter has modified a four-wheel-drive fertiliser spreader to be a log "forwarder" that is able to use existing farm tracks to shift the harvested logs from the back of beyond out to the makeshift landing beside the road. This means the investment in roading is significantly reduced for the landowner. Maintenance and erosion issues are also minimised by not having to make great big roads for great big log trucks.

This off road log truck has a gross vehicle mass (GVM) of 18 tonnes, unladen (TARE) weight of 7 tonnes and therefore a max payload of 11 tonnes. Peter generally loads it to a range of 8-10 tonnes. One of the key advantages with this truck over the heavier 6 and 8 wheeler forwarders is that it needs less area to turn, it goes around tighter corners and fits on smaller narrower roads.

The "forwarder". Actually an "off road log truck"

With a need for more off road log trucks in his own operation, Peter is building another two. They are easy to build now that he has developed the critical measurements.

Peters harvester started life as a 25 tonne machine, with a high and wide undercarriage. It now weighs in at 32 tonnes. The head is a Duxson felling head. Where this machine differs is that it has a winch mounted inside the body of the machine, capable of hauling 6 tonnes.

The winch is operated from within the cab

What is also interesting is that this winch uses a super-lightweight rope called dyneema, a 12 mm composite rope. This stuff is amazingly light and has a breaking strain of 17 tonnes.

12 mm dyneema winch rope

The winch rope is easily manhandled and even more easily repaired by splicing.

Most of the time this harvesting machine works as a standard feller buncher, harvesting trees and shovelling logs to the landing. But where the terrain gets too steep the machine walks down the slope as far as it can go. Trees below this are manually felled and then extracted with the winch, bunched and then shovelled up the one extraction track. A large area of trees can be extracted using one path, negating the need for cutting access tracks. Shovelling also causes much less soil damage than a skidder, because the logs are lifted and moved rather than dragged.

Because the block is mounted up on the arm of the machine, the head of the log being dragged is lifted off the ground, making it easier to haul and with less scouring of the soil surface.
Extraction track

The winch is mostly used in small areas where the slope is too steep to get to with the machine. Productivity drops but Peter believes it is way more productive than other systems. The tradeoff seems to be about managing the right mix of equipment on each job for overall efficiency and with lowest environmental impact. In this case the stand adjoins an area of native bush with high environmental values, a QE2 open space covenant. The requirement was for no damage to the native bush, so the winch was used to directional fell these trees, then haul them up the slope to a central extraction path for shovelling to the track at the top of the slope.

Nice work Peter, looking forward to further developments!

No posts yet

Disclaimer: Personal views expressed in this blog are those of the writers and do not necessarily represent those of the NZ Farm Forestry Association.

Farm Forestry - Headlines