Shiraz University Iran Agricultural Research 1013-9885 14 1 1995 03 21 Effect of photoperiod and light intensity on bolting and flowering in celery اثر فتوپریود و شدت نور بر تولید ساقه و گل در کرفس 81 97 4400 10.22099/iar.1995.4400 EN A. Ramin J.G. Aterton Journal Article 2017 11 26 https://iar.shirazu.ac.ir/article_4400_57e1d65ee2d3c0eb564eb3b4a4ed4555.pdf