Purba Marpaung
Universitas Sumatera Utara

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Kajian Selektivitas Erosi Pada Lahan Budidaya Padi Gogo Di Desa Lau Damak Kecamatan Bahorok Kabupaten Langkat Rika Tamika; Abdul Rauf; Purba Marpaung
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (224.865 KB) | DOI: 10.32734/jaet.v3i3.10966

Abstract

Gogo rice as one of many commodities developed on sloping topography, thus potentially increasing run off a water and soil erosion that will transport nutrients to the other place. The aim of the research was to know the Erosion Selectivity on Land Cultivation of Gogo Rice in Countryside of Lau Damak Distric of Bahorok Sub-Province Langkat. The research was conducted from September until November 2014 through 2 stages of activity, it was fieldwork and laboratory activities. The Stages of fieldwork has done in village at Lau Damak District of Bahorok Langkat on 15% slope. The results of field activities was analysis in agriculture faculty laboratory,University of North Sumatra, Medan. The reseach use a t-test to differentiate the nutrients at upper, center, and bottom of the slope. The selectivity of erosion can be seen from the changes in the levels of clay and organic Carbon in the upper, middle and lower slopes. Selectivity erosion can also be seen from the changes, total-N, available P, pH, K, CEC, and soil texture on the part of the slope.The results showed that the Organic Carbon and Total-Nitrogen were significantly differenton the slopes position.Key words : Soil Erosion, selectivity erosion, gogo rice
Pengaruh Interaksi Bahan Mineral dan Bahan Organik Terhadap Sifat Kimia Ultisol dan Produksi Tanaman Sawi Elva Rizkya Masni; Bintang Sitorus; Purba Marpaung
Jurnal Agroekoteknologi Vol 3, No 4 (2015)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.456 KB) | DOI: 10.32734/jaet.v3i4.11799

Abstract

This study aimed to test the chemical properties of Ultisol and Brassica production by a combination of organic matter and minerals. This research was conducted at the gauze house, Compost Centre, and Research Technology Laboratory, Agriculture Faculty, University of North Sumatra, Medan. The research was conducted from September 2014 until May 2015. The research design used a randomized block design (RAK) by 2 factors treatments and two replications. The first factor is a mineral, M1: ash 250 g / 5 kg soil and M2: portland cement 62.5 g / 5 Kg of soil. The second factor (organic matters) are compost of durian skin by kefir activator (O1), compost of durian skin by yogurt activator (O2), compost of bagasse by kefir activator (O3), compost of bagasse by yogurt activator (O4), compost of sweet potato canopy by kefir activator (O5), compost of sweet potato canopy by yogurt activator (O6), compost of market waste by kefir activator (O7) and compost of market waste by yogurt activators (O8) each of all was 250 g / 5 kg soil. The results showed that organic matter gived significantly effect to increased plant fresh weight. But the effect was not significant to roots fresh weight, soil reaction (pH H2O) and C-organic. Mineral treatments gived significantly to increased the soil reaction (pH H2O). But the effect was not significant to plant fresh weight, root fresh weight and C-organic. Interactions of both treatments gived significantly to increased the soil reaction parameters (pH H2O) of all parameters observed.Key words :Ultisol, organic matters, minerals, brassica
perbaikan sifat kimia tanah sawah akibat pemberian bahan organik pada pertanaman semangka (citrullus lanatus) jonson armando simamora; Abdul Rauf; Purba Marpaung; Jamila Jamila
Jurnal Agroekoteknologi Vol 4, No 4 (2016)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.608 KB) | DOI: 10.32734/jaet.v4i4.13417

Abstract

Tanah  sawah  adalah  tanah  yang  digunakan  untuk  bertanam  padi  sawah sepanjang  tahun maupun  bergiliran  dengan  tanaman  palawija. Kandungan bahan organik tanah yang rendah merupakan salah satu permasalahan utama yang menyebabkan rendahnya produktivitas lahan sawah. Penelitian ini bertujuan untuk mengetahui perubahan beberapa sifat kimia tanah sawah akibat pemberian bahan  organik pada pola tanam padi - semangka. Penelitian ini dilakukan di Desa Air Hitam Kecamatan Lima Puluh Kabupaten Batu Bara Provinsi Sumatera Utara mulai April sampai Juli 2014. Penelitian ini menggunakan Rancangan Acak Kelompok dengan perlakuan Bahan Organik yaitu Tanpa bahan organik, Jerami padi 5ton/ha, pupuk kandang domba 2,5ton/ha, pupuk petroganik dan mulsa jerami 0,5ton/ha. Hasil penelitian menunjukkan bahwa pemberian pupuk petroganik dan mulsa jerami 0,5ton/ha nyata meningkatkan C-organik tanah dan pH tanah, dan pemberian pupuk kandang domba 2,5ton/ha nyata meningkatkan K-tukar tanah serta pemberian jerami padi 5ton/ha nyata meningkatkan berat buah dan diameter buah.
Evaluasi Kadar Air Tanah, Bahan Organik dan Liat serta Kaitannya Terhadap Indeks Plastisitas Tanah Pada Beberapa Vegetasi di Kecamatan Pamatang Sidamanik Kabupaten Simalungun candra setiadi; Kemala Sari Lubis; Purba Marpaung
Jurnal Agroekoteknologi Vol 4, No 4 (2016)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.053 KB) | DOI: 10.32734/jaet.v4i4.13489

Abstract

Pengolahan tanah secara intensif tanpa memperhatikan faktor-faktor yang mempengaruhinya dapat menurunkan kualitas tanah. Indeks plastisitas tanah pada lahan yang dibudidayakan dengan tanaman berbeda membutuhkan pengolahan tanah yang berbeda. Penelitian ini dilakukan untuk mengkaji faktor-faktor dominan yang mempengaruhi indeks plastisitas tanah di lahan Kecamatan Pamatang Sidamanik pada budidaya yang berbeda. Penelitian dilakukan menggunakan metode survei. Sampel diambil secara acak dengan jumlah sampel yang diambil pada ordo tanah yakni 27 untuk lahan  kopi, 12 untuk lahan teh dan 21 untuk lahan hortikultura. Hasil penelitian menunjukkan bahwa secara dominan indeks plastisitas tanah pada lahan yang ditanami kopi, teh dan hortikultura termasuk kriteria rendah serta bahan organik merupakan faktor paling besar yang mempengaruhi indeks plastisitas tanah dengan nilai pengaruh sebesar 54,949%.
Evaluasi Kesesuaian Lahan Untuk Tanaman Kelapa Sawit (Elaeis guinensis Jack.) dan Kelengkeng (Euphoria longan Lamk.) di Kecamatan Na Ix - X Kabupaten Labuhanbatu Utara Rima Rahmadani Munthe; Posma Marbun; Purba Marpaung
Jurnal Agroekoteknologi Vol 5, No 1 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (806.706 KB) | DOI: 10.32734/jaet.v5i1.14728

Abstract

Penelitian  ini  bertujuan  untuk  mengevaluasi  kesesuaian  lahan  tanaman  tanaman Kelapa Sawit  (Elaeis guineensis Jacq.) dan  Kelengkeng                      (Euphoria longan Lamk.) di Kecamatan NA IX - X Kabupaten Labuhanbatu Utara. Metode yang digunakan dalam penelitian ini adalah metode survei. Dari hasil overlay peta jenis tanah, peta kemiringan lereng, dan peta ketinggian  tempat, diperoleh 10 Satuan Peta Lahan  (SPL). SPL 1 memiliki  luas 2.376,73 ha, SPL 2 memiliki  luas 3.102,01 ha, dan SPL 3 memiliki  luas 413,28 ha, SPL 4 memiliki  luas 2.258,09 ha, SPL 5 memiliki  luas 1.058,37 ha, dan SPL 6  memiliki  luas 274,79 ha, SPL 7 memiliki  luas 12.916,04 ha, SPL 8 memiliki  luas 6.142,83 ha,  SPL 9 memiliki  luas 234,42 ha dan SPL 10  memiliki  luas 820,06 ha. Hasil penelitian menunjukkan bahwa kelas kesesuaian lahan potensial tertinggi pada SPL 1 adalah kelapa sawit ( S1 ) dan kelengkeng ( S2 tc ), pada SPL 2 adalah kelapa sawit ( S1 ) dan kelengkeng ( S2 tc ), pada SPL 3 adalah kelapa sawit ( S1 ) dan kelengkeng ( S2 tc ), pada SPL 4 adalah kelapa sawit (S1 ) dan kelengkeng ( S2 tc ), pada SPL 5 adalah kelapa sawit ( S2 eh ) dan kelengkeng ( S2 tc, rc, eh ), pada SPL 6 adalah  kelapa sawit ( S2 tc, eh ) dan kelengkeng ( S2 eh ), pada SPL 7 adalah kelapa sawit ( S1 ) dan kelengkeng ( S2 tc ), pada SPL 8 adalah kelapa sawit ( S2 tc ) dan kelengkeng ( S2 tc ), pada SPL 9 adalah kelapa sawit ( S1 ) dan kelengkeng ( S2 tc ) dan SPL 10 adalah kelapa sawit ( S2 eh ) dan kelengkeng ( S3 eh ). Kata kunci : Kesesuaian lahan, Kelengkeng, Kelapa sawit
Identifikasi Status Hara Tanah, Tekstur Tanah dan Produksi Lahan Sawah Terasering Pada Fluvaquent, Eutropept dan Hapludult Nikson Sitinjak; Purba Marpaung; Razali Razali
Jurnal Agroekoteknologi Vol 5, No 3 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (217.614 KB) | DOI: 10.32734/jaet.v5i3.15990

Abstract

Penelitian ini bertujuan untuk mengetahui status hara, tekstur, dan produksi lahan sawah terasering pada 3 Great Group tanah (Fluvaquent, Eutropept dan Hapludult) di Daearah tangkapan Air Danau Toba. Pengambilan sampel berdasarkan metode cluster dan stratified sampling, dengan membagi lahan sawah terasering menjadi tiga bagian yakni atas, tengah dan bawah. Parameter yang diamati yakni N-Total (Kjeldhal), P2O5, K2O dan Zn (HCl 25%), C-Organik (Walkley & Black), Tekstur (Hydrometer Boyoucous) dan produksi melalui data kuisioner. Serta menguji data parameter dengan uji t 5%. Hasil penelitian menunjukkan status hara tertinggi berada pada lahan sawah terasering Hapludult dan produksi tertinggi berada pada lahan sawah terasering Eutropept. Pada lahan sawah terasering Fluvaquent, tidak terdapat perbedaan status hara dan produksi pada setiap teras kecuali N-Total (Teras Atas vs Teras Tengah). Pada lahan sawah terasering Hapludult, tidak terdapat perbedaan status hara dan produksi pada setiap teras kecuali N-Total (T.Atas vs T.Bawah) dan P2O5 (T.Atas vs T.Tengah) (T.Atas vs T.Bawah). Pada lahan sawah terasering Eutropept, tidak terdapat perbedaan status hara dan produksi pada setiap teras kecuali N-Total (T.Tengah vs T.Bawah).
DETERMINATION TYPE OF ALLOPHANE ON ANDISOL IN DOLAT RAKYAT VILLAGE TIGA PANAH DISTRICT, REGENCY OF KARO Jupri Simamora; Purba Marpaung; Alida Lubis
Jurnal Pertanian Tropik Vol. 2 No. 3 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.742 KB) | DOI: 10.32734/jpt.v2i3.2916

Abstract

The aim of the research was to determinate the type of Allophane minerals by means of Thermogram and to know the type of Allophane minerals with Allophane–Organic Matter relations. The research was done in Dolat Rakyat villages, District of Tiga Panah Karo Regency, In Soil Fertility Laboratory University of North Sumatera, and College of Chemical Industry (PTKI), Medan in June - October 2014. Soil type is Andisol. The result of the research in Dolat Rakyat Village Tiga Panah District, Regency of Karo Thermogram interpretation showed that type of Allophane minerals Andisol that is Allophane B. Allophane-Organic Matter relations showed that type of Allophane minerals is Allophane B with positive relations between Allophane-Humic Acid; negative relations between Allophane-Fulvic Acid, and Allophane-Humic Acid+Fulvic Acid.
The Mapping of Irrigated Paddy Fields which were Polluted by Detergent Waste in Kolam Village, Percut Sei Tuan Sub-district, Deli Serdang District Mulkan Syahputra; supriadi; Marpaung, Purba
Jurnal Online Pertanian Tropik Vol. 8 No. 2 (2021): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.026 KB) | DOI: 10.32734/jopt.v8i2.8078

Abstract

Rice is the staple food of the Indonesian people and in some places polluted by waste. This research aim was to provide a survey and map on the effects of detergent waste (phosphate available), electrical conductivity and soil pH in Kolam Village, Percut Sei Tuan Subdistrict of Deli Serdang District and analysis of sample points to P available, electrical conductivity and soil pH. This research started in September 2017 until January 2018. The method used was Grid Free and P available analysis used Bray II method, analysis of Electrical Conductivity with conductivity meter and analysis of soil pH with a pH meter. The results showed that the P available distribution consisted of very low (18%), low (52%) and moderate (30%). The distribution of soil electrical conductivity was low and the pH of the soil was acidic. Based on the analysis of sample points on P available, Electrical Conductivity and soil pH showed that the farther the distances from the irrigation pollutant channel, the availability of P decreased (0.088 ppm / meter) but did not affect the pH and electrical conductivity.