Assessing nutrient flux control in agroforestry.

Studies on the strategies for the assessment of relevant factors for the determination of the nutrient output in order to control unporductive nutrient losses and off-site effects of land use by agroforestry, in the Central Amazonia, Brasil

Soil quality parameters of a xanthic ferralsol in the Amazon basin.

A Fertbio 2002 reuniu a XXV Reunião Brasileira de Fertilidade do Solo e Nutrição de Plantas, a IX Reunião Brasileira sobre Micorrizas, o VII Simpósio Brasileiro de Microbiologia do Solo e a Reunião Brasileira de Biologia do Solo, sob o tema: "Agricultura: bases ecológicas para o desenvolvimento social e econômico sustentado

Significant subsoil accumulation of mineral nitrogen under perennial crops in a ferralitic Amazonian upland soil: effects of land use systems and single-tree patterns.

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Nutrient and water dynamics in a multi-strata agroforestry system.

In the presentel project, the nutriente and water fluxes are studied ann used as indicators for the stability of the agroforestry systems. The effects of the trees on soil properties, water and nutrient dynamics highly differed between species. To evaluate the sustaninability on an agroforestry system it is important to stress the consideration of spatial variability in the studied parameters. This variability creates the possibility to develop agroforestry with a complementary use of water and nutriente resources. The cropping sysytem with the current management is not seen as viable solution for land use in Amazonia at the moment. However, the discovered features of single trees and the effects on crop production and sustainability so far described encourage futher efforts to improve multi-strata agroforestry as a land use system for the Amazon region

Field calibration of time domain reflectrometry in an Amazonian rainforest soil with variable bulk density: sources of error and influence of land-use.

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Water and nutrient flux measurements.

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