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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 : AGROEKOTEKNOLOGI

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Mapping the Soil Fertility at Arabica Coffee Field in Lumban Julu District, Toba Samosir District Joko Erikson Sihombing; Posma Marbun; Purba Marpaung
Jurnal Agroekoteknologi Vol 7, No 1,Jan (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.626 KB) | DOI: 10.32734/jaet.v7i1,Jan.20270

Abstract

Lumban Julu Subdistrict is one of  the producer Arabica coffee in Toba Samosir District. Know the soil fertility status Very important to increase production Arabica coffee. This research aims to mapping the soil fertility in arabica coffee field in Lumban Julu Subdistrict, Toba Samosir district. It was located at Arabica Coffee Field in Lumban Julu Sub-district, Toba Samosir District. Soil samples were taken from each Soil Map Unit (SMU) and it will be analyzed at the Laboratory. Observed parameters are cation exchange capacity (CEC), bases saturation, C-organic, P-total and K-total. The research showed that all soil fertility status of SMU 1 until SMU 8 were low criterion.Keywords: arabica coffee, mapping, soil fertility status
Pengaruh Pemberian Pupuk Kandang Kambing Dan Pupuk Za Terhadap Sifat Kimia Lahan Bekas Sawah Dan Produksi Bawang Merah (Allium ascalonicum L.) Andriau Matius Sinaga; Posma Marbun; Alida Lubis
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.606 KB) | DOI: 10.32734/jaet.v7i2,April.22449

Abstract

The effect of giving goat manure and ZA fertilizer on the chemical properties of paddy soil and red onion production (Allium ascalonicum L.). The purpose was to determine the effect of goat manure and ZA fertilizer on the chemical properties and production of red onion on paddy fields. This research was conducted from April to June 2018 using factorial randomized block design (RBD) and repeated three times. The first factor is the dose of goat manure consisting of: 0, 2.5, 5, 7.5 tons / ha, and the second factor is the dose of ZA fertilizer consisting of: 0, 200, 400, 600 kg / ha. The results showed that the application of goat manure significantly affected the increase of C-organic, cation exchange capacity. ZA fertilizer has a significant effect on pH reduction.
Analisis Sifat Fisik Tanah Lokasi Penanaman Bawang Merah di Daerah Tangkapan Air Danau Toba Adven Bangun Simanungkalit; Razali Razali; Posma Marbun
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.949 KB) | DOI: 10.32734/jaet.v7i2,April.22861

Abstract

ABSTRACT Soil's physical properties are one of the factors that influence the productivity of shallots. This research aims to determine the correlation of soil's physical properties towards productivity of shallots in Watershed of Lake Toba. This research was carried out in the center of the shallot planting area in the area of ​​Lake Toba, Muara District, Bakti Raja District, Silahisabungan District, Merek District, Haranggaol District, and Samosir Island, which have at altitude 911 – 1432 meters above sea level. This research used survey methods which includes literature studies, preparation of the questionnaire, survey around of Lake Toba and processing data from survey in Lake Toba area. The results showed that soil's physical properties and the productivity of shallots had a correlation with value of r = 0.71. The best soil texture for the cultivation of shallots in Watershed of Lake Toba  is sandy loam. Keywords : shallots, soil's physical properties, Watershed of Lake Toba
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