Developing crown width model for mixed forests using soil, climate, and stand factors

The tree crown is a useful measure of tree vigor and is highly relevant to a tree's environmental adaptability. Crown allometry depends on environmental and stand conditions. Several studies have focused on the effects of climate change and competitive intensity on the crown, but the regulatory role of soil resources and diversity on crown allometry and carbon allocation has been neglected.
Data from 20,994 trees in 232 mixed forests collected between 2011 and 2019 was located near four major mountain ranges in northeast China. The proposed crown width model includes the stand developmental stage, soil, climate, competition intensity, species mixture, species diversity, structural diversity, and their interactions.
We observed that the cross-species allometric scaling exponent does not conform to the universal scaling law. Our results showed that crown width increased with increasing soil bulk density, quadratic mean diameter, and coefficient of diameter variation but decreased with in..., , , # Developing crown width model for mixed forests using soil, climate, and stand factors

## Description of the data and file structure

This README file accompanies the data for the article accepted by the Journal of Ecology.
The data file is named (JEcol_data.xlsx). The data file contains two sheets: \"README\" and \"DATA\".
Abbreviations with simple description as follow, and a full description of these data can be found in sheet \"README\".

| Variables | Abbreviation | Unit |
| :---------------------------------------------------------- | :----------- | :------ |
| plot | | |
| species | | |
| regional dummy | region1 | |
| regional dummy | region2 | |
| regional dummy ...