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All Journal AGROEKOTEKNOLOGI Jurnal AGROSAINS dan TEKNOLOGI PERTANIAN TROPIK

Kemala Sari Lubis

Universitas Sumatera Utara

Author-ID : 3055699

Agriculture, Biological Sciences & Forestry

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KANDUNGAN BAHAN ORGANIK DAN BEBERAPA SIFAT FISIK TANAH SAWAH PADA POLA TANAM PADI-PADI DAN PADI SEMANGKA Erwita Pardosi Erwita Pardosi; Jamilah Jamilah2; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 1, No 3 (2013)
Publisher : Universitas Sumatera Utara

Most of farmers using crop rotation of rice- watermelon to residuemanure straws fromharvested rice at Air Hitam Village, Lima Puluh Distric. The research was conducted to study somephysical characteristics and soil organic matter at two crop rotation (rice – rice and rice -watermelon). The samples were taken at 0 – 20 cm soil depth and at there plots each crop rotation.The parameters of soil measured were temperature, total porosity, bulk density, permeability andorganic matter. The result showed that all parameters were not different significantly between croprotation of rice – rice and rice – watermelon except soil temperature.

KAJIAN KARAKTERISTIK KIMIA AIR, FISIKA AIR DAN DEBIT SUNGAI PADA KAWASAN DAS PADANG AKIBAT PEMBUANGAN LIMBAH TAPIOKA Riyanda Agustira; Kemala Sari Lubis; jamila Jamila
Jurnal Agroekoteknologi Vol 1, No 3 (2013)
Publisher : Universitas Sumatera Utara

The source of liquid waste of tapioca industry from leaching and evaporation. Normally that liquid waste contents rough and soft of suspension solid and organic matter. Accumulation continuously of liquid waste of tapioca industry cause bad taste and odor so can destroy environment. The research executed on 5 tapioka factory at watershed Padang area and aroundabout used a survey method. The research was conducted by water sampling at 3-5 outlets, first from point of exile source of liquid waste to mixed at stream of river-bed. Water sampling used intergrating depth system method, in this researh at water surface of river stream. Water samples were taken three (3) replications for each outlet. Parameters were measured pH, TSS TDS, BOD, COD and velocity of water. The research result to point at stream river waste of tapioca factory outlet PT. Serasi Jaya to point at increase value at some parameters to exceed standard quality class that on pH, TSS, and COD parameters each 4,23, 8,80 mg/L, and 137 mg/L. At stream river water waste of tapioca factory outlet PT. Sumatera Telaga Tapioka find some parameters to exceed standard quality class on parameters value pH, TSS, COD each 4,48, 79,3 mg/L, 1045,2 mg/L. At stream river water waste of tapioca factory outlet PT. Deli Sari Murni find some parameters to exceed standart quality class on TSS and COD parameters each 84,67 mg/L and 167,27 mg/L. Key words : tapioca waste, chemical caharacteristic and velocity

EFEK AIR LAUT, ZEOLIT DAN PASIR VULKAN TERHADAP SIFAT KIMIA TANAH GAMBUT Firlana Firlana; Sarifudddin Sarifudddin; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 2, No 1 (2013)
Publisher : Universitas Sumatera Utara

The objective of this research is to study the effect of sea water, zeolit, and volcanic material onchemical properties of peat soils. This research was conducted at green house, soil chemical andfertility laboratory and research laboratories and technology. This research used factorialrandomized block design with two (2) factors treatments consist of mineral materials (zeolite andvolcanic material) and sea water with three (3) replications. Zeolite and volcanic material were 200gram/pot and 1000 gram/pot. Volume of sea water were 500 ml (+ 1500 ml fresh water) per pot,1000 ml (+ 1000 ml fresh water) per pot dan 1500 ml (+ 500 ml fresh water) per pot. The resultsshowed that application of mineral zeolite and volcanic material influenced significantly increasedof soil acidicity, exchange kalium, exchange calsium, exchange magnesium, number of tillers perclump and number of productive tillers per clump. Volume of sea water influenced significantlyincrease of soil acidicity and electrical conductivity, number of tillers per clump and number ofproductive tillers per clump, but not significantly effect on cation exchange capacity and basesaturation.Keywords : zeolite, volcanic material, sea water, and peat soil

KAJIAN DISTRIBUSI CURAH HUJAN PADA BEBERAPA STASIUN PENAKAR CURAH HUJAN DI DAS PADANG Rodrik T Rodrik T; Kemala Sari Lubis; Supriadi Supriadi
Jurnal Agroekoteknologi Vol 2, No 1 (2013)
Publisher : Universitas Sumatera Utara

This study was conducted to determine the frequency distribution of rainfall at Padang watershed.This research used descriptive statistic analysis by using rainfall data. Data’s used from nine station(Brohol, Pabatu, Kotarih, Silau Dunia, Gunung Para, Gunung Pamela, Gunung Monako, andMaligas) on 10 years. Suitability of pattern frequency distribution determined coefficient skewnessand kurtosis coefficients. The results show that the Gumbel distribution and Log Person Type IIImost suitable for distribution pattern of rainfall in the watershed Padang.

KAJIAN TINGKAT BAHAYA EROSI DI BEBERAPA PENGGUNAAN LAHAN DI KAWASAN HILIR DAERAH ALIRAN SUNGAI (DAS) PADANG Tomy Ardiansyah; Kemala Sari Lubis; Hamidah Sari Hanum
Jurnal Agroekoteknologi Vol 2, No 1 (2013)
Publisher : Universitas Sumatera Utara

Study about erosion hazard level on some land uses was coducted at watershed of Padang. Thisresearch was implemented in the downstream Padang watershed of Tebing Tinggi region. theobjectiveof this research is to determine the tolerance erosion (T), actual erosion (A), and erosionhazard level at several land use in downstream areas DAS Padang. This research was conducted byusing survey method Sampling by cluster method at four (4) land uses consist of palm oil (twentyyears), rubber, cacao and cassava. Prediction of erosion by using USLE (Universal Soil LossEquation). The result showed that highest actual erosion at land rubber was 374.298 ton/ha/thn atundulating topography, lowest at cacao was 17.960 ton/ha/thn at flat topography, highest tolerancaerosion at cassava was 28.250 ton/ha/thn, lowest at rubber was 23.750 ton/ha/thn and level oferosion hazard highest at rubber was 15.760 ton/ha/thn at undulating topography included in thecriteria low, lowest at cacao was 0.718 ton/ha/thn at flat topography included in the criteria verylow.

IDENTIFIKASI HORISON ARGILIK DENGAN METODE IRISAN TIPIS PADA ULTISOL DI ARBORETUM USU KWALA BEKALA Christian Natanael Tarigan; Purba Marpaung; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 2, No 2 (2014)
Publisher : Universitas Sumatera Utara

Identification argillic for reddish brown of podzolic soil (Ultisol) was conducted at Arboretum USUKwala Bekala, Deli Serdang Regency (50 meters above sea level). The research was conducted InJanuary - April 2013 by using thin section method to identification clay skin at each horizons layerby using a microscope petrothin. The results showed that no clay skin at horizons of ultisol fromArboretum USU Kwala Bekala Pancur Batu District , Deli Serdang Regency . it’s not true that bthorizon of ultisols is argillic. Land of arboretum USU Kwala Bekala more suitable as inceptisolsorder with cambic horizonKeywords: thin section, ultisol, argillic

PENGARUH PEMBERIAN FOSFAT ALAM DAN BAHAN ORGANIK TERHADAP SIFAT KIMIA TANAH, PERTUMBUHAN DAN PRODUKSI PADI (Oryza sativa L.) PADA TANAH SULFAT MASAM POTENSIAL Iman Saleh Batubara; Fauzi Fauzi; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 2, No 3 (2014)
Publisher : Universitas Sumatera Utara

This research aims to find out the influence of application organic matter and rock phosphate toimprove soil chemical characteristic, growth and production of rice plant in acid sulphate soils, it isrelated to acid sulphate soils case, such as low pH, high iron (Fe2+) making less production. It isconducted in Faculty of Agriculturegreenhouses, University of North Sumatra, using a randomizedblock design factorial, with 2 factors; organic matter (B), B0 =(0 g /pot); B1 = (40 g straw /pot); B2= (80 g straw/pot); B3 = (40 g cow’s manure/pot); B4 = (80 g cow’s manure/pot); B5 = (26,7 gstraw + 53,3 g cow’s manure/pot) and rock phosphate (P), P0 = (0 g /pot); P1 = (0,64 g rockphosphate /pot); P2 = (1,28 g rock phosphate /pot). The measured parameters were pH, C-organic,P-avaliable, Fe2+, plant height, maximum seedlings and weight of dried grains. The results showedthat organic matter application significantly affected in increasing pH, P-avaliable,maximumseedlings, plant height, weight of dried grains and decreasing Fe2+at final vegetative phase. Rockphosphate application significantly affected in increasing pH, P-avaliable, weight of dried grainsand decreasing Fe2+at final vegetative phase. Combination of the two factors significantly affectedin increasing pH, P-avaliable, maximum seedlings, plant height, weight of dried grains anddecreasing Fe2+at final vegetative phase.Key words: acid sulphate soils, rice plant, organic matter, rock phosphate

Uji Korelasi Antara Debit Aliran Sungai dan Konsentrasi Sedimen Melayang pada Muara Sub DAS Padang di Kota Tebing Tinggi Rian Asnul Maulana; Kemala Sari Lubis; Posma Marbun
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

Knowing about the problem of Watershed is very important to manage the river environment. Oneof the indicator to know the watershed problem is concentration of suspend load sediment.Thisresearch conduct to observe about relationship between stream flow debit and Suspend Load ofSediment which influenced hydrologic condition on Padang Hilir sub Watershed. This researchconduct to from May until October 2013 at Padang Hilir Sub Watershed, use a survey method withrandom sampling. Water sampling is taken out for three times in a week at after rain or no rain forsix months so that total water sample as much as 82 sample. The result show that concentration ofload sediment at no rain measure have highest value in October as big as 256,67 mg/L (worse)and the lowest in July as big as 43,3 mg/L (good),meanwhile at after rain and no rain measurehave highest value at August for 416,67 mg/L (very worse) and the lowest in July as big as 25mg/L (good). At no and after rain relationship betwen concentration of suspend load sediment andstream flow showed by equation : Y = 74,721 + 0,895x with signification value was 0,023 anddetermination value (r2) was 0,014 ( very weak). Meanwhile at not rain relationship betwenconcentration of suspend load sediment on stream flow regression showed by equation :Y = 28,741 +0,030x with stream flow signification value as big as 0,046 and determination value(r2) was 0,065 (weak).Key words : Padang Sub Watershed, stream flow, concentration of suspend load sedimen.

Pendugaan Erosi Aktual Berdasarkan Metode USLE Melalui Pendekatan Vegetasi, Kemiringan Lereng dan Erodibilitas di Hulu Sub DAS Padang Imam Bukhari; Kemala Sari Lubis; Alida Lubis
Jurnal Agroekoteknologi Vol 3, No 1 (2015)
Publisher : Universitas Sumatera Utara

Erosion strongly influenced by vegetation, slope and erodibility. USLE method used to predictactual erosion. Vegetation factor, slope and erodibility used to examine the relationship of the actualerosion and analyzed with multivariate. Soil sampling in the upstream Sub DAS Padang at Rayadistrict, Simalungun based on vegetation, slope and erodibility with a sample size of the 33 samplepoints. The results showed that the highest erosion at 7.177,84 tons.ha-1.year-1 on the non-vegetationwith criteria levels classified as very severe erosion hazard and lowest erosion of 24,30 tons.ha-1.year-1 on the forest vegetation protected by the criteria of erosion potential as very mild.Keywords : Soil erosion, USLE method, DAS Padang

Aplikasi Pupuk KCl dan Pupuk Kandang Ayam Terhadap Ketersediaan dan Serapan Kalium Serta PertumbuhanTanaman Jagung (Zea mays L.) Pada Tanah Inseptisol Kwala Bekala Andri Martilova Sebayang; MMB Damanik; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

The study aims to determine the effect of KCl fertilizer and hen house fertilizer to potassium avaibility and absorption also the growth of maize crop (Zea mays L.) at Inceptisol soil of Kwala Bekala. This study is conducted at home gauze and also in Chemical Laboratory and Fertility of soil, Faculty of Agriculture, University of North Sumatera. Study is compiled in Random Design of Factorial Group consisting of 2 factors with restating. First factor of urea which consist of 4 dose fertilizer: 1.K0 (0), 2.K1 (0,125), 3.K2 (0,25), 4. K3(0.375) and both factor of goat house fertilizer: 1.A0 (0), 2.A1 (25), 3.A2 (50), 4. A3 (75).Result of study show application of KCl fertilizer have an effect on reality to improve the crop herght,dry weight of crop root and dry weight of crop coronet. Application of hen house fertilizer don’t have an effect in reality to improve soil pH, soil C-Organic, soil K-Total, absorbtion of K crop, height of crop, weight dry of KCl fertilizer and hen house fertilizer don’t have an effect in reality which do well by parameters.The usage of hen house fertilizerat dose 10 ton/ha instead of KCl fertilizer in maintaining soil potassium availability.Keywords: KCl fertilizer, hen house fertilizer

Co-Authors Alida Lubis Ameilia Zuliyanti Siregar Andri Martilova Sebayang Azis Syahed Benny Hidayat Berkat Julianto Banjarnahor candra setiadi Christian Natanael Tarigan Erwita Pardosi Erwita Pardosi Fauzi Fauzi Firlana Firlana Hamidah Hanum Hamidah Sari Hanum Imam Bukhari Iman Saleh Batubara jamila Jamila Jamilah Jamilah2 M. M. B. Damanik Melina Vika MMB Damanik Netanya Panggabean Posma Marbun Purba Marpaung Razali Rian Asnul Maulana Riyanda Agustira Rodrik T Rodrik T Sabrina Tengku Sander Manganju Silalahi Sarifudddin Sarifudddin Sarifuddin Sarifuddin Sri Devika Sari Supriadi Supriadi T Sabrina Tomy Ardiansyah Tulus Tulus

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