CARBON Computer Programs
This page contains links to the computer models we are using in the project. Some files require Adobe Acrobat Reader. If you don't have access to the software dowload it by clicking here: download Adobe Acrobat
SCUAF version 5
Soil Changes Under Agroforestry
This program was originally developed by ICRAF with partial funding from ACIAR. The model has been used extensively to analyse agroforestry systems in Asia and Africa. Version 4.0 runs in a DOS window on PC's. As part of the project we have developed a new Windows-based version that uses spreadhseet files for input and output. The user manual (ACIAR technical report No. 41) is available as a PDF file. The new version of the program can be downloaded below.
BRASS
Bioeconomic Rubber Agroforestry Support System
Download BRASS (brass.zip, 83 kb)
This is a new generation of the BEAM Rubber Agroforestry Models RRYIELD and RRECON. The models were originally developed by the Bioeconomic Agroforestry Modelling Project, at the School of Agricultural and Forestry Sciences, University of Wales. The models were later modified under a project funded byACIAR. The new name of the program was proposed by the BEAM team in Wales. The essence of the original models has not changed. The equations remain the same, except for a few minor corrections to the economic component. For details of the mathemathical model See ACIAR Technical Report 42: Modified BEAM Rubber Agroforestry Models: RRYIELD and RRECON. The tutorial in that publication, however, does not apply to this model. The software has been re-written in Visual Basic for Applications and its operation is a considerable improvement over the original (DOS) version.
WANULCAS
Water Nutrient and Light and Capture in Agroforestry Systems
This program was developed by ICRAF. WaNuLCAS simulates belowground interactions where competition for water and nutrients is based on the effective root length densities of crops and trees, the current demand factors of crops and trees, and the supply of nutrients and soil water content. Above-ground interactions, such as competition for sunlight, and management effects, such as planting density, species, pruning regime and fertiliser application, are also simulated. The model divides the soil vertically into four user-defined layers and horizontally into four user-defined spatial zones. Each layer and spatial zone can be characterized according to initial water and nitrogen contents; clay and silt content; bulk density of the soil and soil type. We are indebted to Beta Lusiana for her assistance in calibrating the model and extracting results.