A Growth and Yield Model for Eucalyptus benthamii in the Southeastern United States

Abstract

In recent Eucalyptus cold-tolerance trials, E. benthamii has shown good growth rates as well as cold tolerance for USDA Plant Hardiness Zones 8 and 9. This study developed growth and yield models for E. benthamii in the southeastern United States. A network of 182 temporary sample plots of E. benthamii ranging in age from 1.5 to 13.3 years was established, and inventory data were collected. Site quality was determined by fitting a polymorphic site index curve, whereas a function for stand basal area based on age, dominant height, and site occupancy was fitted. Stand-level volume and dry-weight biomass prediction equations were fitted as a function of dominant height and basal area. Based on the growth and yield model results, mean annual increments ranged from 26.4 m3 ha–1 year–1 at rotation age 6 years on the best sites to 13.7 m3 ha–1 year–1 at rotation age 10 years on the poorest sites. This is the first published set of management-oriented models for land managers considering planting E. benthamii in the southeastern United States.

Repellent, Insecticidal and Antimicrobial Activities of Leaf Essential Oils from Three Eucalyptus Species

“…The present study mainly focused on assessing the growth, photosynthesis and micropropagation of three species (E. cloeziana, E. umbellata and E. benthamii). [15][16][17][18] To the best of our knowledge, the biological activity of Eucalyptus EOs has not been reported, based on our continuous interest [19,20] in Eucalyptus oil, we report the repellent, insecticidal and antimicrobial activity of three Eucalyptus EOs.…”

Eucalyptus Are Unlikely to Escape Plantations and Invade Surrounding Forests Managed with Prescribed Fire in Southeastern US

“…Most eucalypt species are native to Australia and Indonesia and are adapted to tropical and subtropical environments [8,9]. However, some species have developed frost tolerance through advancements in biotechnology [10] or adaptation [3,9,11]. One species in particular-Eucalyptus benthamii-has been shown to exhibit competitive frost tolerance when compared to members of the Forests 2020, 11, 694 2 of 13 same genus [12].…”

Modelagem mista generalizada para estimar afilamento do fuste de árvores de Pinus taeda em diferentes espaçamentos de plantio

“…The larger the randomized sample, the closer the model is to the central limit theory to a database (Xu and Goodacre, 2018). This technique was also applied in forestry to validate taper models (Scolforo et al 2018a), and growth and yield models (Hall et al 2019), for example. As in our study, Hall et al (2019) used a total of 100 samples to validate their model.…”

“…This technique was also applied in forestry to validate taper models (Scolforo et al 2018a), and growth and yield models (Hall et al 2019), for example. As in our study, Hall et al (2019) used a total of 100 samples to validate their model. From the validating process statistics, we can attest that the equation produced in this study can be used to estimate taper for any Pinus taeda trees planted in a 4 m x 2 m and 3 m x 2m spacing from different classes of diameter.…”

“…The resulting arrangement yielded by the combination of approach x model was validated using the Bootstrap technique, which is a nonparametric method with reposition (Efron, 1982) that generated 100 random databases from which RMSE and MAE were calculated. This technique was used in other studies to validate models (Scolforo et al 2018a;Hall et al 2019).…”