Upcoming events for Farm Forestry, Tree Crops Association, Canterbury Botanical Society and the NZ Dryland Forest Initiative.
Next Thursday 30th April, North Canterbury Farm Forestry will be visiting 2 farms in the Glenmark area of Waipara. The first has 50ha of of trees (Eucalyptus, blackwood and, radiata. The latter is about to be harvested. At the second property expect a lively discussion on managing Cupressus macrocarpa, as the eternal question of “what now?” is put to the experts with regard to a 10 year old stand. 10 years seems to be a bit late to start form pruning but then it depends on the form of those that have survived canker.
On the 12th May the NZ Dryland Forest Initiative are holding a seminar and field day in Marlborough. The initiative is to develop a resource of locally grown, naturally durable polewood in the dry eastern parts of NZ, to reduce the reliance on CCA tanalised pine especially in the wine industry.
From a 2006 Tree Grower article:
“The major and continuing investment in viticulture in the Marlborough region has lead to a rapidly expanding market for vineyard posts. Over the last 18 months new vineyard development has continued, with the total area of vineyards in Marlborough alone now totalling over 17,000 hectares. A minimum of 550 posts per hectare are used in these
vineyards, giving an estimated total of over nine million vineyard posts in use. Nearly all of these are CCA treated pine posts.
The average life of a vineyard pine post is about 20 years with replacement generally due to post breakage rather than failure from loss of durability. Vineyard design can also change resulting in a full replacement of the entire vine trellis, including the posts.”
Since then (2006) there has been a massive expansion in vineyards both in area and affected catchments. No one knows the effect of putting in a poisoned post for every 20m on soil and ground water. Broken posts cannot be reused or recycled, they are toxic waste.
The current focus is on Eucalyptus (stringybarks and box) that can grow quickly despite the dry summer conditions and will coppice when harvested. The Dryland Initiatives website is here: http://nzdfi.org.nz/ and for more information and contact details about the seminar (and North Island seminars) go here: http://nzdfi.org.nz/news-and-events/seminars-2015/
Canterbury Botanical Society
Monday 4th May 7.30pm at Upper Riccarton Library There will be a presentation about a weed fern, Dryopteris filix-mas, and it’s implications for indigenous biodiversity.
Canterbury Tree Crops Assn
On Sunday 10th May at 10 am, Tree Crops will visit a property near the corner of Mt Thomas Rd and Johns Rd in Fernside. Parking on the roadside and Field Day signs will be up. It’s really a story of shelter and how with shelter and hard-graft a dry stony paddock has been transformed into a veritable oasis. Espaliered cherries, quince, grapes, hazelnuts, walnuts, mulberry, hardy kiwi and feijoa. I will bring some dried hardy kiwi to taste (from this property) and for more about feijoa check out the NZ Feijoa Growers Assn.
In the afternoon we’ll proceed to Southern Cypresses, forestry and shelter nursery at 75 Raddens Rd, Ohoka and have a look at how cypress clones are grown. There is more to Southern Cypresses than cypresses, for more information here is the website: http://www.cypress.co.nz/our-nursery/