TY - JOUR ID - 1262 TI - Marigold (Calendula officinalis) yield as affected by lamb's-quarters (Chenopodium album) competition JO - International Journal of Plant Production JA - IJPP LA - en SN - 1735-6814 AU - Mirshekari, B. AD - Department of Agronomy and Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Y1 - 2013 PY - 2013 VL - 7 IS - 4 SP - 659 EP - 664 DO - 10.22069/ijpp.2013.1262 N2 - To study interferential effect of lamb's-quarters (Chenopodium album L.) on marigold (Calendula officinalis) yield and lamb's-quarters seed production two factorial field experiments were conducted in Tabriz, Iran, during 2010-2011. Treatments were densities of lamb's-quarters (0, 2, 4, 6 and 8 plants per meter row) and relative times of its emergence (0, 10, 20, 30 and 40 days after marigold emergence). Marigold could tolerate4 lamb's-quarters plants per meter row without any significant yield reduction, when it emerges 40 days after that of marigold. A suitable fit to model of Cousens et al. was obtained for all marigold flower yield data sets at interference with lamb's-quarters. Results also indicate that controlling lamb's-quarters early in the season may reduce its seed production capacity. UR - https://ijpp.gau.ac.ir/article_1262.html L1 - https://ijpp.gau.ac.ir/article_1262_9dc5312514693c6cc427e9c6c3ac9e1f.pdf ER -