Interactions between plant nutrients, water and carbon dioxide as factors limiting crop yields
P. J. Gregory, L. P. Simmonds, and G. P. Warren
Philos Trans R Soc Lond B Biol Sci. 1997 July 29; 352(1356): 987–996. doi: 10.1098/rstb.1997.0077.PMCID: PMC1691976