Applications
Agricultural Drainage Trenching NZ
Agricultural drainage is about land performance over the long term — moving water off wet paddocks efficiently so pasture, cropping or stock performance improves, without over-capitalising in a dedicated self-propelled machine that sits idle most of the year.
The Job
What This Involves
Farm drainage work is typically run across open paddocks with a tractor already on the farm, cutting trenches for drainage coil or pipe at a depth and spacing set by the drainage plan for that block. Runs can be long, ground conditions vary paddock to paddock, and the practical constraint is usually tractor horsepower and PTO capability rather than site access.
Machine Selection
Why the Right Machine Matters
Because the tractor is already on the farm, an attachment trencher avoids the capital cost of a dedicated drainage machine — the deciding factor becomes matching the trencher's power requirement to the tractor's horsepower and PTO, and its depth range to the drainage plan for that paddock. A two-tier conveyor system also matters on farm ground, since it places spoil cleanly to one side rather than leaving it scattered across the paddock.
Things Worth Considering
- Tractor horsepower and PTO configuration available on farm
- Depth required by the farm drainage plan for each paddock or block
- Trench width needed for the drainage coil or pipe being installed
- Soil type — heavier clay soils behave differently under the chain than lighter, sandier ground
- Spoil placement across open paddock ground
See Also
Suited Machines
AFT Trenchers for Agricultural Trenching
Real machines, real specs — every figure below comes straight from the product specification, not this page.
AFT100
Depth: Up to 1.6m
Width: 125–300mm (400mm version available)
AFT45
Depth: 0.4m – 1.2m (configuration dependent)
Width: 40–200mm (configuration dependent)
Agricultural Trenching is one of the applications TrenchWorks supports most often in the Agriculture sector. For the full range of applications and considerations for that industry, see the Agriculture industry guide, or read the complete Trenchers NZ guide for how this fits into choosing a trencher generally.
Common Questions
Frequently Asked
Can I use my existing farm tractor with a drainage trencher?
In most cases, yes — AFT tractor-mounted trenchers are built to run off the tractor's own PTO and hydraulics, matched to a horsepower range rather than requiring a dedicated carrier.
How is agricultural trenching different from general drainage trenching?
The engineering principle is the same, but agricultural work is typically run at scale across open paddocks with a farm tractor, following a whole-farm or whole-block drainage plan, rather than the shorter, tighter-tolerance runs typical of civil or residential drainage.
Ready to Put a Trencher to Work?
Talk to the TrenchWorks team about your project, or request a quote for the right machine for the job.