There is increasing interest in develo** better predictive tools and a broader conceptual
framework to guide the restoration of degraded land. Traditionally, restoration efforts have …

This paper examines the impact of food and energy production on the global N cycle by
contrasting N flows in the late-19th century with those of the late-20th century. We have a …

China is experiencing intense air pollution caused in large part by anthropogenic emissions
of reactive nitrogen,. These emissions result in the deposition of atmospheric nitrogen (N) in …

A Nationwide Nitrogen Deposition Monitoring Network (NNDMN) containing 43 monitoring
sites was established in China to measure gaseous NH 3, NO 2, and HNO 3 and particulate …

Ammonia (NH 3) can interact in the atmosphere with other trace chemical species, which
can lead to detrimental environmental consequences, such as the formation of fine …

This paper contrasts the natural and anthropogenic controls on the conversion of unreactive
N 2 to more reactive forms of nitrogen (Nr). A variety of data sets are used to construct global …

Human production of food and energy is the dominant continental process that breaks the
triple bond in molecular nitrogen (N2) and creates reactive nitrogen (Nr) species. Circulation …

Source apportionment using the bilinear model through a multilinear engine (ME-2) was
successfully applied to non-refractory organic aerosol (OA) mass spectra collected during …

This book describes the underlying water conditions and geologies that support viable
riparia, illustrates the ecological characteristics of riparia, and discusses how riparia are …

Plant scientists have long recognized the need to develop crops that absorb and use
nutrients more efficiently. Two approaches have been used to increase nutrient use …