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:
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.
Irrigation New Zealand has lodged an appeal against new Environment Canterbury irrigation rules it says are unachievable and which could affect the viability of farming in Canterbury. It is estimated that irrigation contributes over $5 billion to New Zealand’s economy…… Read more
Andrew Curtis, CEO of Irrigation New Zealand, said it was a very sad day for Hawke’s Bay and New Zealand following the decision by the Supreme Court on the proposed Ruataniwha land swap. “The Ruataniwha dam depended on that land….. Read more
Recent suggestions that farmers should be taxed for water use ignores the fact that farmers already pay for the water they use, says Irrigation New Zealand. Irrigation New Zealand calculates the average cost of water supplied by irrigation schemes every….. Read more
Read INZ’s concerns about Plan Change 5
Have a read of the e-newsletter we’ve just sent out.
August 8 @ 8:30 am - August 9 @ 5:00 pm
Irrigation fundamentals is a 2 day course targeting new entrants to the industry and frontline staff of businesses and organisations that provide services to the irrigation industry. The aim of the 2 days is to give people a comprehensive overview of the….. Read more
September 18 @ 8:30 am - September 20 @ 5:00 pm
Gain the skills and knowledge to carry out assessments of irrigation systems in order to determine how efficiently they are operating. This Level 4 NZQA certificate runs for 7 months and requires some previous knowledge and experience in irrigation. You….. Read more
Some interesting rainfall totals for Waimakariri & Canterbury t.co/J5nz32JHXb