Abstract
Research to assess soybean yields planted under palm oil trees was conducted in North Sumatera, Indonesia. This research aimed to provide information on soybean varieties that were most suitable for planting under palm trees. Two experiments were conducted in the palm tree areas i.e. under one-year-old (IP 1) and two years old (IP 2) of the palm tree. In each site, the experiment was arranged in a split-plot design with two replications. The main plot was spacing row arrangements, i.e. double-spacing (50 cm x (30 cm x 20 cm) and single-spacing (40 cm x 15 cm), whereas the subplot was soybean varieties consisted of Dega 1, Dena 1, Argomulyo, and Anjasmoro. Research results showed that the average seed yield obtained in IP 1 was higher than IP 2, and soybean planted in a single-spacing produced higher seed yield compared to double-spacing. Argomulyo variety was superior in IP 1 with a seed yield of 3.66 t/ha and Dena 1 was the most superior in IP 2 with a seed yield 2.17 t/ha, both in single-planting arrangements.
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