Variasi Kedalaman Muka Air Tanah dan Pemberian Terak Baja terhadap Sifat Kimia Tanah Gambut dan Bobot Akar Kelapa Sawit

Abstract

The research was conducted to see the ffict of variations of Water Level Maragement and Steel Slag Application on Peat Chemical Properties in relation to weight of roots of oil palm plantatiow. The research used split plot designwith two foctors, the first factor (main plot) was water levels tnanogement were WI, W2, W3, and the second factors (sub plot) was dosages of steel slag application were A0, Al, A2, and A3. The research was conducted tn the area of palm oil (6 yems olQ rJnit Panai Jaya, PT PTPN [V, Central Panai, Labuhan Batu, North Sumatra. The soil sampling conducted at two places, in the palm oil disc with depth of 0-15 and I5-30 cm; outer palm oil disc at depth of 0-30 cm. Thefirst observations in thefirst 3 montla afier application of steel slag, steel slag showed that the pH of the soil and the affect of the total nitrogen in the soil to a depth of 0-15 cm in the palm oil disc. While the combination of water level management and application of steel slag only affect of the total niffogen in the soil to a depth of 15-30 cm in the palm oil disc. The second observation at 6 montla afier the application of steel slag, showed that the management of water levels can affect the wailable of phosphorus in the soil to a depth of 0-30 cm outer palm oil disc and increase production fresh fruit bunch (FFB) of palm oil. Application of steel slag only affects of total nitrogen in the soil outside of the dish with a depth of 0-30 cm. While th.e combination of water level management and application of steel slag influence the weight of tertiary root dry in the disc with a depth of 0-15 cm and the outside of tlrc dtsh to a depth of 0-30 cm, total dry weight of the roots to the outside of the dishwith 0-30 cm, the soil pH of the soil outside of the disc a depth of 0-30 cm and nailable phosphorus in the soil outstde of the disc with a depth of 0-30 cm