Irrigation’s role in reducing agricultural emissions

At climate events and corporate sustainability forums, conversations around short-lived greenhouse gases are gaining momentum. Methane and nitrous oxide may not dominate headlines the way carbon dioxide does, but their climate impact is profound. Methane is roughly 27-30 times more potent than CO₂ over a 100‑year timeframe, while nitrous oxide is nearly 300 times more powerful. Because these gases are also short‑lived, reducing them offers immediate climate and air quality benefits. 

Yet in many of these discussions, one critical sector, and one highly deployable solution, is often missing: irrigation. More specifically, how precision irrigation and improved water management can serve as practical tools to reduce emissions while supporting productive, resilient farming systems. 

Effective water management plays a direct role in minimizing the conditions that lead to methane (CH₄) and nitrous oxide (N₂O) formation. Overirrigation can create anaerobic soil environments that stimulate methane production, while excess soil moisture combined with nitrogen inputs can drive nitrous oxide emissions through denitrification. In this context, emissions are not solely a fertilizer issue; they are also closely tied to how water is managed on the farm.  

Precision irrigation addresses these challenges by delivering water more accurately and consistently, helping maintain aerobic soil conditions and reducing excess moisture in the root zone. This shift limits the biological processes that generate emissions, while also enabling more targeted fertigation that reduces excess nitrogen availability. The result is a system that simultaneously improves water efficiency, supports crop performance and contributes to emissions reductions.  

This approach is not theoretical. Precision irrigation is already widely deployed across a range of crops and regions, and its benefits can be measured at the field scale. Baseline practices, such as irrigation method, soil moisture conditions and nutrient management strategies, can be compared to precision systems, where these reductions can be quantified using established emission factors and global warming potential metrics. This creates a clear and credible pathway for reporting non-CO₂ emissions reductions within existing Scope 1–3 frameworks, without reliance on carbon credits or carbon removal claims.  

As corporate climate strategies continue to evolve, there is increasing demand for solutions that deliver measurable impact while avoiding complexity or reputational risk. Precision irrigation meets this need. It represents a practical, scalable approach that aligns emissions reductions with water stewardship and agricultural resiliency goals.  

Water professionals have long understood that irrigation decisions influence far more than crop performance. Today, those same decisions are also a meaningful lever for reducing emissions in agriculture. As attention to these opportunities grows, the irrigation industry is well positioned to help lead the conversation, and to deliver solutions that are already working in the field. 

Written with the support of AI.  

Val Fishman is advocacy and development consultant for Orbia Precision Agriculture (Netafim).