Changes in Soil Chemical Properties and Growth of Palm Oil (Elaeis guineensis Jacq) with Comparative Composition of Plant Media

One of the benefits of Oil Palm Empty Fruit Bunches (OPEFB) waste can be processed into bokashi as a planting medium for oil palm nurseries. The research aims to: Determine changes in soil chemical properties due to the comparison of planting media, and obtain the best ratio of planting media to the best seedling growth in Main-Nursery. The research was conducted in Koto Panjang Ikur Koto Village, Koto Tangah District, Padang City. The study was conducted in January-April 2022. RAL design (completely randomized design) with 4 treatments and 6 replications. One experimental unit consist of 3 polybags of plants so there are 72 polybags of plants. Treatment: A = Control (Without Bokashi OPEFB), B = Topsoil: Bokashi OPEFB (1:3), C = Topsoil: Bokashi OPEFB (1:1), and D = Topsoil : Bokashi OPEFB (3:1). The results showed: Treatment B or Topsoil : Bokashi OPEFB (1:3) is the best, cause increase in soil chemical properties: pH 1.17 units; C-organic 1.98%; N-total 0.11%; P-available 4.01 ppm; K-dd 0.48 me/100g; Mg-dd 1.42 me/100g; and Ca-dd 2.67 me/100g. OPEFB bokashi application was significantly different to increase the plant height, not significant to wet weight and dry weight of the plant.