@misc{indiciae8e5fbffc8c81, title = {Root : shoot ratios, optimization and nitrogen productivity.}, author = {Göran I Agren and Oskar Franklin}, year = {2003}, doi = {10.1093/aob/mcg203}, url = {https://pubmed.ncbi.nlm.nih.gov/14565938/}, note = {Source identifier: 14565938} }