Rose flower production and quality as affected by Ca concentration in the petal Asher Bar-Tal, Rob Baas, Ruth Ganmore-Neumann, Aleid Dik, Nollie Marissen, Avner Silber, Sara Davidov, Amram Hazan, Benny Kirshner and Yigal Elad Agronomie, 21 4 (2001) 393-402 DOI: 10.1051/agro:2001132