Kajain Sifat Fisika dan Kimia Tanah Ultisol pada Lahan Karet yang Telah Menghasilkan dengan Beberapa Jenis Vegetasi yang Tumbuh di Kebun PTPN III Sarang Giting

Abstract

DONY ROMANOSA : The Study of Physical And Chemical Properties of Soil Ultisol The Rubber Land has Resulted In Some Type of Vegetation that Grows In PTPN III Sarang Giting, supervised by SUMONO and ACHWIL PUTRA MUNIR Physical and chemical soil characteritics are important factors for the growth of rubber plant. This research was aimed to study physical and chemical soil characteritics of the rubber plant with vegetations of harupat spikes, grass, taro and no vegetation in PTP. Nusantara III Sarang Giting. 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 4,55-4,69 (acid). The vegetation soil had porosity of 55,42-56,36 % at a depth of 5 cm and 54,86-55,14 % at a depth of 25 cm. The water content of field capacity was ranged from 37,9-49,9 % at a depth of 5 cm and 35,1-47,5 % at a depth of 25 cm. Permeability was ranged from 3,40-4,72 cm/h. Total N was 0,07-0,11 %. P available was ranged from 15,10-17,70 ppm. K exchange of land was ranged from 0,57-0,76 me/100g. The soil with no vegetation had porosity of 55,42 % at a depth of 5 cm and 54,86 % at a depth of 25 cm. The water content of field capacity was 42,8 % at a depth of 5 cm and 42,2 % at a depth of 25 cm. Permeability was 4,72 cm/h. Total N was 0,10 %. P available was 17,12 ppm. K exchange of land was 0,67 me/100g.