Additivity in tree biomass components of Pyrenean oak (Quercus pyrenaica Willd.)

摘要: In tree biomass estimations, it is important to consider the property of additivity, i.e., total should equal sum components. This work presents functions that allow estimation stem and crown dry weight components Pyrenean oak (Quercus pyrenaica Willd.) trees. A procedure considers additivity presented, applied a particular case. The application simultaneous equations system used parameter restrictions considered residual contemporaneous correlations allowed more efficient estimates consistent prediction intervals.