Improved estimates of biomass expansion factors and root-to-shoot ratios: An approach for different forest types across a climatic gradient in Brazil

Advancements in the current state of the art of the key drivers of biomass expansion factor (BEF) and the root-to-shoot ratio (R) are crucial for producing accurate information on forest biomass and carbon stocks. Hence, we compiled a nationally representative dataset encompassing diverse tree growth stages and climatic gradients. In this study, we propose models to improve BEF and R estimates at the tree level for Eucalyptus and Pinus plantations in Brazil. In general, the BEF values were more representative (91.7%) in the database than the R values (8.3%) due to the high cost of collecting coarse roots. Regarding genera, Eucalyptus was more extensively sampled (89.9%) than Pinus (10.1%), reflecting the predominance of Eucalyptus as the most widely planted genus in Brazil. The average BEF and R values calculated in this study were 1.16 and 0.22, respectively, for Eucalyptus spp. and 1.22 and 0.31, respectively, for Pinus spp. In predicting the BEFs, the random effects in the linear mix..., , # Data from: Improved estimates of biomass expansion factors and root-to-shoot ratios: An approach for different forest types across a climatic gradient in Brazil

Dataset DOI: [10.5061/dryad.5x69p8dhk](10.5061/dryad.5x69p8dhk)

## Description of the data and file structure

**Data_lopes_et_al_2025.zip**

Experimental dataset with raw data for *Eucalyptus* and *Pinus* species, and upscaling dataset with processed data referring to commercial plantation areas in Brazil, using 2022 as the base year.

### Files and variables

#### File: Data_lopes_et_al_2025.zip

**Description:** Experimental dataset with raw data for *Eucalyptus* and *Pinus* species, and upscaling dataset with processed data referring to commercial plantation areas in Brazil, using 2022 as the base year.

**1.   Experimental Dataset**

**1.1 File list**

RAW_DATA_BEF_EUCALYPTUS.xlsx

RAW_DATA_BEF_PINUS.xlsx

RAW_DATA_R_EUCALYPTUS.xlsx

RAW_DATA_R_PINUS.xlsx

**1.2 File description**

The experimental dataset consists of f...,