Abstract In order to investigate the possibility of planting six late maturity rice cultivars from northern Iran using early plastic covered nursery (for increasing the length of growing season), a study was conducted as randomized complete blocks design with three replications during 2012-2013.Experiments were carried out in the Lordegan county of Chaharmahal and Bakhtiari province. After disinfection and germination,seeds were planted separately in seedling trays and transported under the plastic cover after emerging. Transplanting was done one month before usual time of area at four to five leaves stage. Two-year variance analysis showed that Domsiah and Sahel cultivars had the highest yield with a mean of 6436 and 6217 kg per hectare, respectively. Koohrang cultivar as control genotype with an average yield of 5736 kg/ha was ranked lower than Domsiah and Sahel cultivars and above the other cultivars. Overall, Considering the superiority of Domsiah and Sahel cultivar sand on condition of at least one month of cultivation, these cultivars seem appropriate. Keywords: late maturity cultivars, rice, plastic cover, grain yield, early cultivation Manuscript profile

Optimum Planting Density of Mung Bean for Lordegan Region Lotfali Lotfi* and Ali Molaei Horticulture Crops Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shahrekord, Iran *Corresponding address Email: lotfiali48@yahoo.com Received: 25 July 2018 Accepted: 10 January 2019 Abstract Mung bean is one of the important beans in human nutrition. The aim of this study was to determine the most appropriate planting density for the highest yield of mung bean (Vigna radiata L.) cultivars in Lordegan region. The study was carried out as a factorial experiment in a randomized complete block design with three replications. Factors included four mung bean cultivars namely Parto, VC6173A, VC637194 and Lordegan Local mung bean plus three different planting densities of 30, 40 and 50 plants per square meter. Flowering date, physiological maturity date, plant height, number of pods per plant, number of seeds per pod, 100-seed weight and seed yield were measured. Results of combined analysis of variance over two years showed that genotypes were significantly different in studied traits (except for number of seeds per pod). The effect of planting density was significant on all traits (except for 100-seed weight and the number of days to maturity). The interaction between genotype and density was not significant for any of the traits. The highest grain yield (1357.8 kg/ha) was obtained from VC6173A line a density of 40 plants per square meter. Keywords: Planting density, Variety, Yield, Mung bean Manuscript profile