Increasing incidences of eutrophication and groundwater quality impairment from
agricultural nitrogen pollution are threatening humans and ecosystem health. Minimal …

Nitrate pollution of ground and surface water bodies all over the world is generally linked
with continually increasing global fertilizer nitrogen (N) use. But after 1990, with more …

Abstract Nitrous oxide (N 2 O), like carbon dioxide, is a long-lived greenhouse gas that
accumulates in the atmosphere. Over the past 150 years, increasing atmospheric N 2 O …

Nitrogen (N) is used in many of life's fundamental biomolecules, and it is also a participant in
environmental redox chemistry. Biogeochemical processes control the amount and form of N …

In August 2017, the Gulf of Mexico's hypoxic zone was declared to be the largest ever
measured. It has been estimated that a 60% decrease in watershed nitrogen (N) loading …

Global-scale nitrogen budgets developed to quantify anthropogenic impacts on the nitrogen
cycle do not explicitly consider nitrate stored in the vadose zone. Here we show that the …

Eutrophication is a major global concern in lakes, caused by excessive nutrient loadings
(nitrogen and phosphorus) from human activities and likely exacerbated by climate change …

Cyanobacterial harmful algal blooms (CyanoHABs) are an increasingly common feature of
large, eutrophic lakes. Non-N 2-fixing CyanoHABs (eg, Microcystis) appear to be …

Understanding how to manage N inputs to identify the practices that maximize N recovery
has been an organizing principle of agronomic research. Because growth in N fertilizer …

More than two billion people and 40% of global agricultural production depend upon
unsustainable groundwater extraction. Managed aquifer recharge (MAR), the practice of …