Sandy soils cover approximately 900 million ha worldwide particularly in arid and semi-arid
regions. There are extensive areas of sandy soils under cultivation, but the soil fertility is …

The distribution of plant species, the species compositions of different sites, and the factors
that affect them in tropical rain forests are not well understood. The main hypotheses are that …

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 …

Aim Conservation and land‐use planning require accurate maps of patterns in species
composition and an understanding of the factors that control them. Substantial doubt exists …

In an oxisol–spodosol system developed on the terrestrial surface of the lower Tapajós
Valley, the determination of total mercury (Hg), organic carbon (C), iron and aluminum oxy …

Microenvironmental heterogeneity is important in the ecology and diversification of the rich
palm flora that inhabits neotropical rain forests. At small-0.1-10 2 m-scales, neotropical rain …

We investigate the spatial variability of saturated hydraulic conductivity (Ksat) along a
tropical rainforest catena, which consists of a Typic Kandiudult (Latossolo Vermelho …

Some soils from the western Amazon region contain KCl-extractable Al contents 5 to 10
times greater than is typical for highly weathered soils containing predominantly kaolinite …

Tropical forest accumulates one of the largest biomasses among terrestrial ecosystems,
however its precise amount and patterns of spatial variation are still imperfectly known. We …

Each year, thousands of km 2 of humid tropical forest are logged in the Brazilian Amazon.
Many of these areas are underlain by clay soils dominated by non-expansive kaolinite …