This work reviews applications of stable isotope analysis to the studies of transport and
transformation of N species in groundwater under agricultural areas. It summarizes evidence …

Nitrate (NO3−) contamination of surface-and groundwater is an environmental problem in
many regions of the world with intensive agriculture and high population densities …

Nitrate (NO3−) concentrations in public water supplies have risen above acceptable levels
in many areas of the world, largely as a result of overuse of fertilizers and contamination by …

La agricultura tiene efectos directos e indirectos en las tasas y composiciones de la recarga
y de la biogeoquímica de las aguas subterráneas. Entre los primeros, cabe citar la …

Nitrate (NO 3) is one of the most common contaminants in aquatic environments and
groundwater. Nitrate concentrations and environmental isotope data (δ 15 N–NO 3 and δ 18 …

The feasibility of using nitrogen and oxygenisotope ratios of nitrate (NO 3−) forelucidating
sources and transformations ofriverine nitrate was evaluated in a comparativestudy of 16 …

A detailed isotopic characterization (δ15NNtotal, δ15NNO3, δ18ONO3, δ34SSO4,
δ18OSO4, δ13CCtotal, and 87Sr/86Sr) of 27 commercial fertilizers used in Spain is …

Nitrate contamination, often associated with agricultural activities, is a major problem in
some shallow aquifers and is increasingly becoming a threat to groundwater supplies …

There is a growing interest in the role of bedrock in global nitrogen cycling and potential for
increased ecosystem sensitivity to human impacts in terrains with elevated background …

Stable N isotopes are used to examine the source, flow and fate of N at scales ranging from
greenhouse pots to landscapes. There are two main approaches: the 15N-enriched method …