Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 53 1 2022 03 21 Evaluation of grain yield and quality of quinoa cultivars as affected by planting date and plant density in Jupar region of kerman Evaluation of grain yield and quality of quinoa cultivars as affected by planting date and plant density in Jupar region of kerman 113 129 84746 10.22059/ijfcs.2021.311672.654761 FA Hamid Najafinezhad Agricultural and Horticultural Research Department, Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Kerman, Iran. Nader Koohi Agricultural Engineering Research Department, Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research,Education and Extension Organization (AREEO), Kerman, Iran Davood Darvishi . Forests and Rangelands Research Department , Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Kerman, Iran Journal Article 2020 10 12 In order to evaluate the effect of planting date and plant density on grain yield and quality of four quinoa cultivars (<em>Chenopodium quinoa</em> willd.), an experiment was conducted as a randomized complete block design arranged in a split factorial was used with four replications in two years (2018 &2019) at the Agricultural Research Station located, Jupar region, Kerman, Iran. . Experimental treatments consisted of planting dates (24 July, 8 August  and  23 August) as main plots and cultivars (Giza1,Titicaca, Q12 and Q18) and plant density (16.6 and 33.3 plant m^-2) as sub plots. The highest grain yield was produced at August, 8, compared to the other dates. The average grain yield of Giza1, Titicaca, Q12 and Q18 cultivars were 2484, 2239, 2547, and 2881 kg ha^-1, respectively. Lodging was observed in cultivar Q18 in all planting dates. Giza1 cultivar with the average of 18.23% crude protein and 94.12 mg kg^-1 iron had better grain quality than other cultivars. The highest and lowest harvest index (0.35 and 0.26) belonged to Q12 and Titicaca cultivars, respectively. Giza1 and Q12 cultivars were the earliest and latest cultivars with 82 and 99 days of the growing season respectively. Based on the results, Q12 cultivation on August 8 and Giza1 on August 23 with plant density of 33.3 plant m^-2 is recommended for Jupar region of Kerman. In order to evaluate the effect of planting date and plant density on grain yield and quality of four quinoa cultivars (<em>Chenopodium quinoa</em> willd.), an experiment was conducted as a randomized complete block design arranged in a split factorial was used with four replications in two years (2018 &2019) at the Agricultural Research Station located, Jupar region, Kerman, Iran. . Experimental treatments consisted of planting dates (24 July, 8 August  and  23 August) as main plots and cultivars (Giza1,Titicaca, Q12 and Q18) and plant density (16.6 and 33.3 plant m^-2) as sub plots. The highest grain yield was produced at August, 8, compared to the other dates. The average grain yield of Giza1, Titicaca, Q12 and Q18 cultivars were 2484, 2239, 2547, and 2881 kg ha^-1, respectively. Lodging was observed in cultivar Q18 in all planting dates. Giza1 cultivar with the average of 18.23% crude protein and 94.12 mg kg^-1 iron had better grain quality than other cultivars. The highest and lowest harvest index (0.35 and 0.26) belonged to Q12 and Titicaca cultivars, respectively. Giza1 and Q12 cultivars were the earliest and latest cultivars with 82 and 99 days of the growing season respectively. Based on the results, Q12 cultivation on August 8 and Giza1 on August 23 with plant density of 33.3 plant m^-2 is recommended for Jupar region of Kerman. https://ijfcs.ut.ac.ir/article_84746_00b5315b28ab5eb83128664d27849313.pdf