Jingfeng Xiao, Yu Zhou, and Li Zhang. 2015. Contributions of natural and human factors to increases in vegetation productivity in China. Ecosphere 6:233. http://dx.doi.org/10.1890/es14-00394.1
Appendix A: Trends in agricultural and forestry statistics and relationships of annual NDVI with crop yield and total plantation area.
Ecological Archives C006-081-A1.