The objective of this summary report is to give an overview of the main technical activities and results of the CASCA project during the fourth and final year (November 2004 - December 2004). The E.U. granted to CASCA a two-month extension until the end of December 2005 to permit the recollection and exploitation of field data undertaken during this fourth and final year of the project. One technical meeting was held in May 2005 at the headquarters of CIRAD, Montpellier, France on progress towards biophysical modeling. The final consortium meeting was held (November 19-23 of 2005) in Costa Rica at the headquarters of CATIE to assess the data collection performed during the fourth year of CASCA and to plan reporting and dissemination activities during the last months of this fourth and final year. This meeting was attended by a total of 16 persons representing all partner institutions and with researchers from all the work-packages. 22 presentations were done during these four days.