SIMWAL: A structural-functional model simulating single walnut tree growth in response to climate and pruning Philippe Balandier, André Lacointe, Xavier Le Roux, Hervé Sinoquet, Pierre Cruiziat and Séverine Le Dizès Ann. For. Sci., 57 5-6 (2000) 571-585 DOI: 10.1051/forest:2000143