March 25, 2024 Yang, Z., S. L. Collins, R. J. Bixby, H. Song, D. Wang and R. Xiao. 2021. A meta-analysis of primary productivity and rain use efficiency in terrestrial grassland ecosystems. Land Degradation & Development 32(2):842-850. Home » Yang, Z., S. L. Collins, R. J. Bixby, H. Song, D. Wang and R. Xiao. 2021. A meta-analysis of primary productivity and rain use efficiency in terrestrial grassland ecosystems. Land Degradation & Development 32(2):842-850.