Spectrometry of pasture condition and biogeochemistry in the Central Amazon

Gregory P. Asner, Alan R. Townsend, Mercedes M.C. Bustamante

Research output: Contribution to journalArticlepeer-review


Regional analyses of Amazon cattle pasture biogeochemistry are difficult due to the complexity of human, edaphic, biotic and climatic factors and persistent cloud cover in satellite observations. We developed a method to estimate key biophysical properties of Amazon pastures using hyperspectral reflectance data and photon transport inverse modeling. Remote estimates of live and senescent biomass were strongly correlated with plant-available forms of soil phosphorus and calcium. These results provide a basis for monitoring pasture condition and biogeochemistry in the Amazon Basin using spaceborne hyperspectral sensors.

Original languageEnglish
Pages (from-to)2769-2772
Number of pages4
JournalGeophysical Research Letters
Issue number17
StatePublished - 1999


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