Irrigation New Zealand

Efficient water management plays an important role in irrigated agricultural systems.
Under conventional irrigation (Uniform Rate Irrigation or URI), parts of
an irrigated paddock are over or under-irrigated due to spatial variability in soil water-holding capacity, infiltration rates and topography. Under-irrigated areas are subject to water stress, resulting in production loss, while over-irrigated areas suffer from poor plant health and nutrient leaching.

Variable Rate Irrigation (VRI) systems are designed to address the need to better achieve
irrigation efficiency, aiming for the best conversion of each millimetre of irrigation water
to plant growth. Irrigation efficiency is commonly referred to as application efficiency and
depends on three main factors:

  • Applying the correct depth of water.
  • A uniform application.
  • The application rate being less than the soil’s infiltration rate.

Application efficiency is the percentage of applied water that is retained in the root zone
(or target area) after an irrigation event. VRI allows for maximum application efficiency
of centre-pivot or lateral-move irrigators. VRI systems achieve this by utilising nozzle and
speed control, soil mapping technology, site-specific soil moisture monitoring, and other
decision support tools.

INZ has produced a Precision Irrigation Resource Book to aid irrigators in their understanding of VRI systems.

 

NEWS

27th April 2017

The release of ‘Our fresh water 2017’ is a call to action for all New Zealanders, says IrrigationNZ CEO, Andrew Curtis. The report measures fresh water quality, quantity and flows, biodiversity and cultural health. “This report highlights the impact we….. Read more

Testing Irrigation Efficiency – what’s really going on on-farm

12th April 2017

IrrigationNZ has spent the summer gathering data on farms around Canterbury to get a better, more accurate understanding of irrigation efficiency. The results, say INZ Project Manager, Steve Breneger, will provide a benchmark for progress. “We’ve been on-farm for the….. Read more

Would you like a tax with your water?

12th April 2017

If there’s one thing every election has in common it’s tax. Usually one party promising to lower them; the others threatening to raise them. This year however, tax is being talked about in the context of water. I’ve spent time….. Read more

April 2017 e-newsletter

12th April 2017

Have a read at the e-newsletter that we’ve just sent out: click here.

Let’s talk about the Selwyn River

24th March 2017

The concern being expressed over the state of the Selwyn River shows just how far we’ve come as a community. It wasn’t that long ago when New Zealand’s fresh water resources were pillaged and plundered, used as waste chutes for….. Read more

EVENTS

IOD Governance Essentials – Ashburton

June 8 @ 8:30 am - 5:30 pm

Potential and new directors and managers who interact with boards and wish to increase their understanding of the governance environment. A refresh course for existing directors and managers.

Irrigation Operator and Manager Training – Cromwell

September 26 @ 10:00 am - 4:30 pm

Proudly supported by our Training Partners             TRAINING FOR IRRIGATION OPERATORS AND MANAGERS – IMPROVE YOUR IRRIGATION SKILLS AND KNOWLEDGE CROMWELL Where:  CROMWELL, venue tba When: 10am- 4pm Tuesday 26th September 2017 Cost: IrrigationNZ Members $350 +GST and Non-members $550 +GST Closing….. Read more

Irrigation Accreditation

Smart Irrigation