A. M. Weitz

Calibration of time domain reflectometry technique using undisturbed soil samples from humid tropical soils of volcanic origin

Michael Keller, M. Keller, E. Veldkamp, 1997 .

Deforestation trends in the Atlantic Zone of Costa Rica: A case study

I. G. Staritsky, E. J. Huising, E. Veldkamp, 1992 .

Effect of pasture age on soil trace-gas emissions from a deforested area of Costa Rica

M. Keller, E. Veldkamp, W. Reiners, 1993, Nature.

Nitrous oxide, nitric oxide, and methane fluxes from soils following clearing and burning of tropical secondary forest

Patrick M. Crill, Jason C. Neff, Michael Keller, 1998 .