Nitrogen (N) is a key input to food production. Nearly half of N fertilizer input is not used by
crops and is lost into the environment via emission of gases or by polluting water bodies. It is …

The supply of nitrogen commonly limits plant production in boreal forests and also affects
species composition and ecosystem functions other than plant growth. These interrelations …

El suelo de zonas áridas y semiáridas es típicamente bajo en materia orgánica por la
escasa cubierta vegetal y limitada productividad. El escaso nitrógeno contenido en la …

For the past 3.8 billion years, the geochemistry of the Earth's surface-its atmosphere, waters
and exposed crust-has been determined by the presence of biota. Photosynthetic organisms …

Contemporary soil science and conservation methods of effective forestry Forests and the
soils that serve as their foundation cover almost a third of the world's land area. Soils …

Soil nitrogen (N) often limits productivity in agroecosystems, prompting fertilizer applications
that increase crop yields but can degrade the environment. Nitrogen's dual role in both …

Equilibrium and kinetic isotope fractionations during incomplete reactions result in minute
differences in the ratio between the two stable N isotopes, 15N and 14N, in various N pools …

This chapter outlines the methodologies and the concepts used to assess soil internal
nitrogen (N)‐cycle processes. It discusses laboratory and field methods for determining …

Studies of nutrient cycling in forests span more than 100 yr. In earlier years, most attention
was given to the measurement of the pools of nutrients in plants and soil and of the return of …

Some theories and experimental studies suggest that areas of low plant species richness
may be invaded more easily than areas of high plant species richness. We gathered nested …