Strip Forest & Catchment Drain
For those interested in managed forestry, here is a little information on one of the projects we’re developing on Taranaki Farm; the mixed species strip forest. This new development comprises a water catchment drain / access road, with 2 rows of mixed forestry on the upper side of the new road, and 5 rows on the lower side.
This development is the brain child of forestry designer Darren Doherty who has devised a mixed species strip forest bordering a new water catchment drain. This drain was surveyed to have a very slight fall from left to right (in the photo below), to feed water into the dam (seen on the right). The dam has also been enlarged to accommodate the increased catchment area.
As this project involves mixed species, positioning the individual trees represents certain challenges. Regarding the design, I’ll quote Darren,
I first designed the layout on graph paper to develop the spatial design parameters. From a base list of species (available at the various nurseries) this process centred on spacing trees according to their life form, attributes (eg. nitrogen fixation) and rotation lengths. This eventuated in a pattern or sequence within the matrix which was then relatively easy to map out using excel. At a cursory glance it all might appear to be a randomised plot, when in fact it is quite the contrary.
The species selected for this system are shown below. As a component of my education, I’ll be developing detailed entries of each on of these species, and will activate links in the list below as these are published.
| Species | Common Name | Code | Quantity |
| Acacia mearnsii | Late Black Wattle | LBW | 280 |
| Acacia melanoxylon | Blackwood | BW | 280 |
| Cedrus deodara | Himalaya Cedar | HIM | 50 |
| Cupressus lusitanica | Mexican Cypress | LUS | 50 |
| Cupressus macrocarpa | Monterey Cypress | MAC | 50 |
| Cytisus palmensis | Tagasaste | TAG | 515 |
| Eucalyptus nitens | Shining Gum | EN | 40 |
| Eucalyptus polyanthemos | Red Box | POL | 30 |
| Eucalyptus sideroxylon | Red Iron Bark | SID | 30 |
| Eucalyptus tricarpa | Iron Bark | TRI | 20 |
| Eucalyptus botryoides | Mahogany Gum | B | 35 |
| Gleditsia triancanthos | Honey Locust | GLE | 25 |
| Morus nigra | Black Mulberry | MOR | 25 |
| Pinus Pinea | Stone Pine | SP | 25 |
| Populus italica x | Lombardy Poplar | LOM | 70 |
| Quercus ilex | Helm Oak | QI | 15 |
| Quercus suber | Cork Oak | QS | 15 |
| TOTAL | 1555 |
Darren employs a novel method of organising the species layout. Using an excel document, he has created a matrix of compatible species using the codes show here. This grid has been printed and laminated for use during the planting process. These laminated site cards are intended to avoid confusion. Such an aid is clearly essential.
The column free of codes represents the catchment drain / access road. Also evident is the attention to ‘vista’ - seen in the placement of cork & helm oaks, and stone pines. This will give an avenue feeling to the access road.
Referencing the codes show in the table above, you can also identify the perimeter species as ‘fodder’ trees. This strip forest now divides a pasture field in two (upper and lower). Hence the useful positioning of species beneficial to cattle along the perimeter of this forest. This provides the means to diversify the cattle’s diet, and cushion feed shortages during difficult times.
Currently, we’re mechanically planting the remaining trees and putting out milk carton tree guards. The next step is fencing. For this, I’ve produced the drawing below, which also gives an impression of the general scope of this forestry project.











The house on Taranaki Farm has been undergoing a major upgrade, and a component of this has been making efficiency improvements. One notable addition has been the installation of a handheld electricity meter.