Blog | Water Better
Are You Leaving 20% of Your Water – and Your Profit – on the Table?
This blog draws on SWAN Systems’ research review
Every season, irrigators across Australia and around the world apply water with the best of intentions. But research consistently shows a confronting truth: most irrigated crops receive more water than they actually need — often by 20% or more. That extra water doesn’t just disappear. It costs money, it can harm your crop, and in an era of tightening water allocations, it’s a resource you simply can’t afford to waste.
So why does it keep happening?
The gap between intention and optimal
Irrigation is complex. Soil types vary across paddocks. Weather shifts week to week. Crop water demand changes constantly through the season. Without the right tools, even experienced irrigators are essentially making educated guesses — and those guesses almost always err on the side of ‘more is safer.’
But here’s the thing: too much water is just as damaging as too little. Research on crops including cotton, wheat, maize and many horticultural species consistently shows that yield peaks at an optimal soil moisture level — and then declines if that level is exceeded. Waterlogging reduces aeration, limits root function and can lock up nutrients. More water, in these cases, means less crop.
Studies on wheat, cotton, maize and other crops all show the same pattern: yield peaks at an optimal irrigation level, then declines if that level is exceeded. More water doesn’t mean more crop.
The 20% figure — and what it means for your bottom line
A 20% reduction in applied water might sound modest, but translate that to your operation and the numbers get significant. Less water purchased or pumped. Lower energy bills. Reduced risk of drainage and runoff. And in many cases — better crop quality and yield.
Research from California’s long-running CIMIS irrigation advisory program found that farmers who adopted data-driven scheduling reduced their water use by an average of 13% and increased yields by 8% — generating measurable financial returns across every crop type studied, from almonds and pistachios to lettuce and cotton. That 13% real-world result is itself telling: the global research benchmark for what’s achievable through optimised scheduling sits at around 20%. CIMIS users, operating on real farms with existing infrastructure and no new hardware, captured the majority of that potential simply by making better use of data.
20%+
water saving identified as achievable through optimised scheduling across global research
13%
average water saving achieved by real-world CIMIS program farmers — with an 8% yield increase
The good news: the answer isn’t complicated
You don’t need to overhaul your entire operation. The farms achieving these results aren’t using futuristic technology — they’re using the data they already have access to, applied through proven scheduling methods that match irrigation timing and volume to actual crop water demand.
The challenge has always been making that process simple enough to fit into a busy farming schedule. That’s exactly what tools like SWAN Systems are designed to do — taking the science of optimal irrigation scheduling and making it something you can act on every day, with minimal disruption to your existing setup.
Want to see the full evidence?
Download our research summary — or talk to the SWAN Systems team about what better scheduling could mean for your operation.
