PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

This study was aimed at finding the highest yielding variety and its best growing technology among selected superior mungbean (Vigna radiata L.) varieties grown on a dryland. The assessment was done based on four field experiments conducted at Gumantar village, sub-district of Kayangan, and North Lombok. The soil was categorised as poor (low fertility) with 0.46% organic matter, 0.05% total nitrogen (N) (Kejdhal), 11.25 ppm available phosphate (P) (Olsen) and exchangeable potassium (K) 0.77 me%. Mungbean varieties of Kenari and Betet coupled with fertiliser rate, population density and time of weeding were the objects of assessment. The experiments focused on variety and fertiliser rate, population density and fertiliser rate, variety and population density, and time of weeding to study their effects on yield of mungbean. The results show the highest yielding variety was Kenari with yield ranging from 876 to 1,215 g/5 m2 (1.75 to 2.43-ton ha-1), followed by Betet, from 880 to 949 g/5 m2 (1.76 to 1.90 ton/ha). The optimum population density was at 500,000 plants ha-1 with fertiliser (NPK Phonska, 15-15-15) rate of 200 kg ha-1. It was found the weeding time improved yield and the best time for weeding was 49 Days After Sowing (DAS). It appears that Kenari is the most suitable variety to be grown in North Lombok at population density of 500,000 plants ha-1 fertilised with Phonska at rate of 200 kg ha-1 and weeding at 49 DAS.