The main objective of this work was to quantify and update the US Midwest agricultural state
of Iowa's contribution of nitrate-nitrogen to the Mississippi River stream network against the …

Various techniques exist to estimate stream nitrate loads when measured concentration data
are sparse. The inherent uncertainty associated with load estimation, however, makes …

Flood-control reservoirs are common in the US and several are located in highly agricultural
regions of the Midwest. In this study, a mass balance of annual and seasonal NO 3-N …

Total phosphorus (TP) export in rivers contributes to development of hypoxic conditions in
receiving waterbodies and is typically sourced to agricultural nonpoint sources. Systematic …

Constructed wetlands are standard conservation practices used to reduce nitrate loads in
agricultural watersheds. Many studies have examined the efficiency of denitrification in …

Study region The study area is located in southern Manitoba, in the prairie region of Canada
Study focus This study examined the impact of hydrological variability on the timing and …

Abstract We evaluated Iowa Department of Natural Resources nitrate (NO 3–N) and US
Geological Survey hydrological data from 1987 to 2016 in nine agricultural watersheds to …

Combinations of best management practices (BMPs) are needed to achieve nutrient
reduction goals in the Mississippi/Atchafalaya River Basin (MARB), but field results are …

Nebraskan streams contribute excess nitrogen to the Mississippi/Atchafalaya River Basin
and Gulf of Mexico, which results in major water-quality impairments. Reducing the amount …

Phosphorus (P) is delivered to streams as episodic particulate P and more continuous
soluble P (orthophosphorus [OP]), and it is important to determine the proportion of each P …