Se presenta un manual detallado que describe los metodos estandarizados de procedimiento para el analisis de suelo y tejidos vegetales con el objeto de 1) proveer a los investigadores de America tropical informacion sobre metodologia existente para los analisis de suelos acidos y plantas del tropico, 2) incrementar entre las instituciones nacionales e internacionales un intercambio de informacion sobre las metodologias empleadas en America tropical para definir y aplicar las mejores y 3) hacer que los analisis de suelos y de plantas constituyan una parte dinamica de la investigacion y permi

By altering evapotranspiration and influencing how water is routed and stored in a basin, natural and agrarian ecosystems affect river flow. To quantify the impact of ecosystems on streamflow in two large river basins in Asia and Africa, simple statistical relationships were calculated, enabling flow characteristics to be ascertained from basic catchment features. This approach allows the impact of specified land-use change on streamflow to be determined.

Large-scale estimates of the area of terrestrial surface waters have greatly improved over time, in particular through the development of multi-satellite methodologies, but the generally coarse spatial resolution (tens of kms) of global observations is still inadequate for many ecological applications. The goal of this study is to introduce a new, globally applicable downscaling method and to demonstrate its applicability to derive fine resolution results from coarse global inundation estimates.