Nebraska NRDs describe phased nitrate controls, monitoring network and a producer app to reduce fertilizer inputs
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Summary
The Nebraska Association of Resource Districts told the task force that a phased, locally implemented nitrate management program (education, mandatory testing and management plans) and expanded groundwater monitoring can slow nitrate increases. Speakers described producer outreach, voluntary changes to fertilizer timing and a new Producer Connect
Dean Edson, director of the Nebraska Association of Resource Districts, described Nebraskas phased approach to increasing nitrate concentrations in groundwater and explained how local resource districts use monitoring, regulation and producer outreach to address contamination.
Edson detailed four management phases in NRD plans: phase 1 (education and voluntary practices where nitrates are below 5 mg/L), phase 2 (510 mg/L: mandatory soil testing, certified applicators, water testing, fall/winter fertilizer restrictions in designated areas), phase 3 (>10 mg/L: required nitrogen-management plans that account for all nitrogen sources, including irrigation water), and a potential phase 4 for areas showing continued upward trends that could include further restrictions. He said the phases apply only in areas where monitoring demonstrates elevated nitrate concentrations.
Edson presented data showing that early local programs reduced fertilizer application rates in some areas (Lower Niobrara and Central Platte NRDs): a 2015 survey in one NRD showed 91% of producers were applying more nitrogen than University of Nebraska recommended rates; by 2020 that share fell to 66% in the same sample, and some producers now rely on nitrogen in irrigation water and split applications. He emphasized that nitrates accumulate over decades and that remediation requires multi-decade commitments.
To improve reporting and producer engagement, Edson described a Producer Connect mobile app (pilot with 19 NRDs and partners including NRCS, local co-ops and industry) that collects field-level fertilizer, soil and irrigation data; reverses the typical fertilizer formula by starting from available nitrogen and then adds fertilizer only as needed; and produces anonymized benchmarking reports for producers and NRDs to track fertilizer use, yields and profitability.
Why it matters: Concentrations of nitrates in groundwater can affect public health and municipal water systems. Nebraska NRDs have used monitoring, phased regulatory tools and producer-facing technology to reduce fertilizer inputs and to track progress; the task force received these practices as possible models for expanded monitoring and voluntary/regulatory options in Kansas.
