Kajian Sifat Fisika dan Kimia Tanah Ultisol pada Lahan Kelapa Tahun Tanam 2003 dengan Beberapa Jenis Vegetasi yang Tumbuh di Kebun PTP. Nusantara II Pagar Merbau

Abstract

PRETTY : Study of physical and chemical characteritics of ultisol soil in oil palm plantation (planted in 2003) with several vegetations, in Pagar Merbau PTP Nusantara II. Supervised by SUMONO and RISWANTI SIGALINGGING. Physical and chemical soil characteritics are important factors for the growth of oil palm. This research was aimed to study physical and chemical soil characteritics of the oil palm with vegetations of Pueraria javanica, grass, and no vegetation in Pagar Merbau PTP Nusantara II. The observed parameters were soil texture, porosity, water content of field capasity, soil permeability, total Nitrogen, available Phospate, and land Potassium exchange. The results showed that the soil type was ultisol, with sandy loam texture and pH of 5,57-5,98 (acid). The soil vegetation had porosity of 42 % at a depth of 5 cm and 40-41 % at a depth of 25 cm. The water content of field capacity was ranged from 23,2-27 % at a depth of 5 cm and 22,6-26,1 % at a depth of 25 cm. Permeability was ranged from 4,6-5,95 cm/h. Total N was 0,10 %. P available was ranged from 13,49-17,09 ppm. K exchange of land was ranged from 0,24- 0,36 me/100g. The soil with no vegetation had porosity of 41 % at a depth of 5 cm and 39 % at a depth of 25 cm. The water content of field capacity was 22,3 % at a depth of 5 cm and 22,1 % at a depth of 25 cm. Permeability was 1,39 cm/h. Total N was 0,08 %. P available was 20,26 ppm. K exchange of land was 0,61 me/100g.