Background Nitrogen (N) is one of the key mineral nutrients for plants and its availability has
a major impact on their growth and development. Most often N resources are limiting and …

Ammonium (NH4+) toxicity is an issue of global ecological and economic importance. In this
review, we discuss the major themes of NH4+ toxicity, including the occurrence of NH4+ in …

In the majority of agricultural growing regions, crop production is highly dependent on the
supply of exogenous nitrogen (N) fertilizers. Traditionally, this dependency and the use of N …

Background Plants can utilize two major forms of inorganic N: NO3−(nitrate) and NH4+
(ammonium). In some cases, the preference of one form over another (denoted as β) can …

Submerged soils and the wetlands they support are of huge practical importance: in global
element cycles, as centres of biodiversity, in global food production. They are also uniquely …

Most higher plants develop severe toxicity symptoms when grown on ammonium (NH) as
the sole nitrogen source. Recently, NH toxicity has been implicated as a cause of forest …

THE high incidence of failure when late-successional conifer species are replanted on
disturbed forest sites is a considerable problem1–3. Here we advance a hypothesis that …

THE importance of nitrate (NO–3) in the internal nitrogen cycle of undisturbed coniferous
ecosystems has not been widely recognized1, 2. Nitrate concentrations in soils from these …

Within the past few decades, major losses of seagrass habitats in coastal waters impacted
by cultural eutrophication have been documented worldwide. In confronting a pressing need …

The diversity (richness and community composition) of ammonia‐oxidizing archaea (AOA)
and bacteria (AOB) in paddy soil with different nitrogen (N) fertilizer amendments for 5 …