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

Water tax ‘not about water bottlers’ – they’ll pay less than 3%

22nd September 2017

Labour leader Jacinda Ardern should not answer questions about the party’s proposed water tax by saying it’s about targeting water bottlers, says IrrigationNZ. When Labour Leader Jacinda Ardern was asked in last night’s TVNZ Leader’s Debate whether rural New Zealand….. Read more

Water tax by the numbers: A breakdown

18th September 2017

Recent attempts to estimate the cost of Labour’s proposed water tax to farmers have demonstrated a basic lack of understanding of how irrigation works, says nonprofit membership body IrrigationNZ. This issue, which is compounded by a lack of detail from….. Read more

​Confusion reigns on ‘no new taxes’ as water tax WOULD be introduced

14th September 2017

Confused members of nonprofit body Irrigation New Zealand are contacting IrrigationNZ asking if a water tax IS going ahead, following Labour’s announcement on tax plans today. While Labour’s tax statement is being called ‘no new taxes this term’ , the water….. Read more

Enable farmers to farm sustainably, don’t punish them, says PM

14th September 2017

More than 400 farmers and other rural business owners turned out in Ashburton this week to hear National’s policies on the primary sector and the environment and discuss concerns on a raft of new proposed taxes by Greens and Labour,….. Read more

Survey reveals unintended impacts of water tax

31st August 2017

A new survey of irrigators has revealed the potential impact of implementing Labour’s proposal on a water tax, including the news that it is set to lead to more intensive farming. Key findings from the survey conducted by IrrigationNZ were:….. Read more

EVENTS

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:  Otago Polytech, Bannockburn Rd, Cromwell – Rm 12 When: 10am- 4pm Tuesday 26th September 2017 Cost: IrrigationNZ Members $350 +GST….. Read more

Irrigation Operator and Manager Training – Ranfurly

September 28 @ 10:00 am - 4:30 pm

Proudly supported by our Training Partners             TRAINING FOR IRRIGATION OPERATORS AND MANAGERS – IMPROVE YOUR IRRIGATION SKILLS AND KNOWLEDGE RANFURLY Where:  Wedderburn Cottages – Red Barn, 7145 Wedderburn- Becks Road, Ranfurly When: 10am- 4pM Thursday 28th September 2017 Cost: IrrigationNZ….. Read more

Irrigation Accreditation

Smart Irrigation