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All Journal AGROEKOTEKNOLOGI Jurnal Mantik Penusa PERTANIAN TROPIK
Posma Marbun
Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara Medan
Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management

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Journal : PERTANIAN TROPIK

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Kajian Beberapa Sifat Kimia dan Fisika Tanah Ultisol pada Beberapa Vegetasi di Desa Amborokan Pane Raya, Kec. Raya Kahaen (Studi Kasus: Lahan Semi Kritis di Wilayah Sub DAS Sibarau) Febri Hot Mardongan Sihombing; Kemala Sari Lubis; Posma Marbun
Jurnal Pertanian Tropik Vol. 5 No. 3 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.086 KB) | DOI: 10.32734/jpt.v5i3.3057

Abstract

Wilayah Sub DAS Sibarau termasuk wilayah yang memiliki lahan agak kritis atau semi kritis yang cukup luas yaitu sekitar 13.163,59 ha dari keseluruhan luas Sub DAS yaitu 25.005,89 ha. Penelitian ini bertujuan untuk mengkaji sifat kimia dan fisika tanah Ultisol pada beberapa vegetasi di Desa Amborokan Pane Raya, Kecamatan Raya Kahean. Penelitian dilaksanakan pada bulan Mei hingga September 2017 dengan menggunakan metode survei. Sampel tanah diambil sebanyak 3 titik untuk setiap vegetasi dan kemiringan yang berbeda pada kedalaman 1-10 cm dan 10-20 cm dengan menggunakan metode acak sederhana. Parameter tanah yang diukur adalah kemasaman tanah (elektrometri), dan kandungan karbon organik tanah (Walkley and Black), dan tekstur tanah (hydrometer bouyoucos). Analisis tanah dilakukan di Laboratorium PT. Socfin Indonesia. Hasil penelitian ini menunjukkan bahwa pada kemiringan 0-8% rata-rata nilai pH tanah sebesar 4,61% dan C-organik 1,04% sedangkan pada kemiringan 8-15% rata-rata nilai pH tanah sebesar 4,46% dan C-organik 0,91%. Pada kemiringan 0-8% nilai rata-rata fraksi liat 20,27%, fraksi debu 15,02% dan fraksi pasir 64,41% sedangkan pada kemiringan 8-15% nilai rata-rata fraksi liat 27,48%, fraksi debu 19,87%, dan fraksi pasir 52,63%.
Pendugaan tingkat bahaya erosi pada hutan dan lahan Kopi Arabika (Coffea arabica) di Kecamatan Sibolangit Devisna Situngkir; Jamilah; Posma Marbun
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.756 KB) | DOI: 10.32734/jpt.v5i1.3131

Abstract

Vegetation is one of the factors affecting the actual erosion of a land. The changes in forest land use patterns into coffee lands can increase the erosion hazard. The aim of this research was to get information about erosion hazard level in forest and coffee arabica lands in Sibolangit Sub District by using USLE (Universal Soil Loss Equation) method. The Research was conducted in January-July 2017 in Sibolangit District at three villages ie Negeri Suah, Bukum and Cinta Rakyat. In this research, were 6 samples in Arabica coffee field sample (1, 2 and 3) and in Forest sample (1, 2 and 3). The research was conducted by using survey method and continued with soil erosion calculation by USLE (Universal Soil Loss Equation) prediction equation. The results showed that the value of erosion in the coffee arabica land in Cinta Rakyat Village on the slope of 60% was 432,87 ton.ha-1.year-1 (very high). The highest erosion hazard level in Bukum Village on the slope of 25% was 88,144 ton.ha-1.year-1 and the highest erosion hazard level in the Negeri Suah Village on the slope of 46% was 193,083 ton.ha-1.year-1. The value of erosion in the area forest in the Cinta Rakyat Forest on the slope 58% was 1,087 ton.ha-1.year-1with lowest erosion hazard. The lowest erosion hazard level in the Bukum Forest on the slope of 21% was 0,190 ton.ha-1.year-1and the lowest erosion hazard level in the Negeri Suah Forest on the slope of 36 % was 0,309 ton.ha-1.year-1.
Co-Authors Abdul Rauf Adven Bangun Simanungkalit Agnes Helen R. Purba Alida Lubis Alida Lubis Andreas Napitupulu Andriau Matius Sinaga Ardian Halomoan Sipahutar Asmarlaili S. Hanafiah Asmarlaili Sahar Hanafiah Bintang Sitorus Chrisman Daniel Pandapotan Chyntia Arkesti Pasaribu Cynthia Simanjuntak Daniel Siregar Devisna situngkir Devisna Situngkir Emalia Sinarta Br.Tarigan Ernitha Panjaitan Erwin Masrul Harahap Fachrul Rozy Ariandy fauzi fauzi Fauzi Fauzi Fauzi, Fauzi Febri Hot Mardongan Sihombing Febri Hot Mardongan Sihombing Hardy Guchi Hardy Guchi Hardy Guchi Hardy Guchi Hendra Jawa Sertua irvan selamat purba Jamilah Jamilah Jamilah Joko Erikson Sihombing Kemala Sari Lubis Kemala Sari Lubis Kemala Sari Lubis kemala sari lubis Lahuddin Musa Ledi Kiswanto Barus Leonard Sihite Linda Wati Sihite Mariani sembiring MMB Damanik Muhammad Riza Hapiza Mukhlis Mukhlis Mukhlis Mukhlis Purba Marpaung Purba Marpaung Putri Juli Artha Rapika Tanti Harahap Razali Rian Asnul Maulana Rima Rahmadani Munthe Rino Lindri Chuaca Samuel Evans Ketaren Sarifuddin Sarifuddin Simbolon, Timbul Stephanie Claudia Chrisdyana Tambunan Sumina Silaban Supriadi Supriadi Supriadi Supriadi Syahputra Abadi Sembiring T Sabrina T. Sabrina Tambun Sihotang Timbul Simbolon Usmul Safti Kartika Volmer Damanik Yossi C Manurung