This is the third and final part of the three-part series Water-Smart Regeneration: Bridging Soil Health and Irrigation Efficiency by Adrian Vargas, RRG NBS Water and Irrigation Expert. 

Soil regeneration and landscape design fundamentally change how water behaves on a farm. As soils become more structured and landscapes begin to hold water more effectively, irrigation systems must adapt. Continuing to irrigate based on old assumptions can lead to overwatering, nutrient leaching, and unnecessary costs. 

This is where smart irrigation becomes essential: not as a standalone technology, but as a responsive layer that aligns water application with ecological function. 

From Fixed Schedules to Adaptive Irrigation 

Conventional irrigation management often relies on fixed schedules or generalized crop coefficients (Kc) that assume uniform soil conditions and stable climates. In regenerative systems, those assumptions no longer hold. Improved soil structure, higher organic matter, and cooler microclimates reduce evaporation and increase plant-available water. 

As a result, evapotranspiration demand (ET₀) decreases and crops may require less frequent irrigation. However, these changes are not linear or easily predicted. Each field responds differently depending on soil type, crop mix, climate, and management history. 

Regenerative irrigation therefore needs to be adaptive – guided by observation, data, and continuous adjustment rather than preset formulas. 

Monitoring What the Soil Is Actually Doing 

In regenerative systems, soil becomes the primary indicator. Tools such as soil moisture sensors and tensiometers provide real-time insight into how much water is available in the root zone and when irrigation is truly needed. 

Rather than irrigating “just in case,” farmers can respond to actual soil conditions. Over time, this often leads to fewer irrigation events, lower pumping costs, and reduced stress on water infrastructure. 

At our farms, these tools are integrated into broader water strategies to optimise efficiency, and to verify that regenerative practices are delivering measurable outcomes. Monitoring helps translate ecological change into operational decisions and, where relevant, into reporting and financing frameworks. 

Revisiting Crop Water Demand in Regenerative Systems 

As regenerative practices take effect, changes in crop water demand become noticeable. Improved soil moisture retention, deeper root systems, and moderated temperatures can reduce the crop coefficient (Kc). But because no universal model exists for how regeneration alters water dynamics, recalibration must happen farm by farm. 

This is why RRG NBS treats each system as a unique case. Irrigation strategies are adjusted based on field data, climate patterns, and farmer experience rather than assumptions imported from conventional systems. 

This approach allows water use to decrease without compromising yield, often improving crop stability under variable weather conditions. 

Irrigation as Part of a Regenerative System 

Smart irrigation works best when it complements soil and landscape regeneration rather than compensating for degradation. When soils infiltrate water efficiently and landscapes retain moisture, irrigation shifts from being a corrective measure to a fine-tuning tool. 

This integrated approach supports: 

• More stable soil moisture across seasons 

• Reduced water and energy costs 

• Lower risk during heatwaves and dry spells 

• Stronger alignment between ecological health and farm productivity 

It also creates systems that are easier to manage under increasing climate volatility, where rainfall timing and intensity are less predictable year to year. 

RRG NBS Approach: Practical, Data-Driven, and Locally Rooted 

RRG NBS supports the integration of regenerative practices with smart irrigation through: 

• Irrigation and water system assessments aligned with soil and landscape conditions 

• Sensor-based monitoring to inform adaptive irrigation decisions 

• Design support linking regenerative land management with water infrastructure 

• Verification frameworks that translate ecological performance into measurable outcomes 

By combining ecological understanding with data and on-the-ground implementation, irrigation becomes a tool for regeneration rather than extraction. 

Regenerating Water, Not Just Managing It 

As water scarcity and climate variability intensify, the question is no longer how to use water more efficiently alone but how to regenerate the systems that make water available in the first place. 

By aligning soil health, landscape design, and adaptive irrigation, regenerative agriculture offers a practical pathway toward water resilience. Smart irrigation, when grounded in ecological function, helps farmers reduce risk, lower costs, and build systems that remain productive under changing conditions. 

This integrated approach sits at the core of our work: supporting water-smart, regenerative systems that are resilient, measurable, and designed for long-term viability.