TY  - RPRT
TI  - Root : shoot ratios, optimization and nitrogen productivity.
AU  - Göran I Agren
AU  - Oskar Franklin
PY  - 2003
DO  - 10.1093/aob/mcg203
UR  - https://pubmed.ncbi.nlm.nih.gov/14565938/
ID  - 14565938
ER  -