Ecology Letters (2011) 14: 939–947 Abstract Tropical rain forests play a dominant role in
global biosphere‐atmosphere CO2 exchange. Although climate and nutrient availability …

The inclusion of N 2-fixing tree species in tree plantations has the potential to increase
biomass production compared to monocultures. Both successes and failures have been …

The Amazon rainforest is the Earth's largest reservoir of plant and animal diversity, and it has
been subjected to especially high rates of land use change, primarily to cattle pasture. This …

The challenge to identify the biospheric sinks for about half the total carbon emissions from
fossil fuels must include a consideration of below‐ground ecosystem processes as well as …

Tropospheric ozone, also a greenhouse gas (Lammel and Graßl 1995), is a threat to human
health and it decreases crop yield (NAS 1991). Although they have different atmospheric …

Several lines of evidence suggest that nitrogen in most tropical forests is relatively more
available than N in most temperate forests, and even that it may function as an excess …

Abstract The Amazon Basin contains almost one-half of the world's undisturbed tropical
evergreen forest as well as large areas of tropical savanna,. The forests account for about 10 …

Over the past several decades, the conversion of native forest to agricultural land uses has
accelerated across the Amazon Basin. Despite a growing body of research on nutrient …

Tropical soils contain large stocks of carbon and nitrogen that can be altered by clearing for
agriculture. In the Brazilian Amazon, cattle pasture is the predominant use for cleared forest …

Modern agriculture is based on the notion that nitrate is the main source of nitrogen (N) for
crops, but nitrate is also the most mobile form of N and easily lost from soil. Efficient …