Abstract
For cubic volume estimation, commonly used measures of stem form, such as form quotient or crown measures, are difficult to obtain in the field and usually give only marginal improvement in mean square error of prediction. We develop prediction equations using stem height at a predetermined fraction of diameter at breast height outside bark, or the ratio of this height to total height, to predict cylindrical form factor and total stem volume for Douglas fir ( Pseudotsuga menziesii (Mirb.) Franco). Using an independent dataset, a comparison of the volume prediction for our model shows substantial improvement in mean square deviation for volume prediction compared to three commonly-used volume equations for Douglas fir in the Pacific Northwest.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.