ADAPTATION OF NINE NEW INDONESIAN IMPROVED SOYBEAN VARIETIES IN PADDY FIELDS OF CENTRAL LOMBOK, INDONESIA

Soybean (Glycine max L.) is one of the Indonesian most important agricultural commodities which contain high protein and become a raw material for various processed foods such as tofu, tempeh, soy milk, soy sauce, and bean sprouts. Recently, Indonesian soybean production has not been able to meet domestic needs; therefore, it still relies on importation. The main obstacle of soybean production in Indonesia is low productivity. One of the efforts to increase productivity is through the use of new improved varieties. This research aims to investigate the adaptation of nine new Indonesian improved soybean varieties in paddy fields of Central Lombok, West Nusa Tenggara Province, Indonesia. The research was conducted in July - October 2019 using a non-factorial randomized block design with the treatment of nine new improved soybean varieties namely Dega 1, Deja 1, Demas, Dena 1, Devon 2, Devon 1, Burangrang, Anjasmoro, and Detap. Each variety was replicated four times. Plant performances were observed during the vegetative phase and just before harvest which included plant height, number of branches, number of leaves, number of segments, and number of clumps. While the observed yield components were included the number of pods, weight of 100 grains, and soybean productivity. The results showed that during the vegetative phase, the highest plant height was produced by the variety of Devon 1, the highest number of branches was produced by Burangrang variety, the highest number of leaves and segments were produced by Anjasmoro variety. While during the generative phase, soybean varieties had a significant effect on plant height parameters with the highest value owned by Deja 1 variety. For the yield components, Demas variety produced the greatest number of filled pods, then the highest weight of 100 grains was produced by Dega 1 variety, and the highest productivity was achieved by Dena 1 variety.