scholarly journals HUBUNGAN PENURUNAN VOLUME AIR DENGAN PEMAMPATAN GAMBUT PADA TINGKAT KEMATANGAN YANG BERBEDA DI KAWASAN GAMBUT BERENGBENGKEL KALIMANTAN TENGAH

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Rabiatul Wahdah
Keyword(s):  
Moisture Content ◽  
Optical Density ◽  
Peat Soil ◽  
Soil Samples ◽  
Fiber Content ◽  
Water Volume ◽  
Undisturbed Soil ◽  
Central Kalimantan ◽  
Specific Pore Volume ◽  
Peat Area

Gambut merupakan lahan yang tergenang sepanjang tahun, persoalan kemudian muncul manakala lahan gambut alamiah dialihfungsikan. Tujuan dari penelitian adalah mengetahui pemampatan gambut akibat penurunan volume air pada tingkat kematangan yang berbeda, dengan sampel tanah yang digunakan diambil di kawasan gambut Berengbengkel Kalimantan Tengah masing-masing 30 sampel tanah terusik dan tak terusik untuk analisa kadar lengas, berat volume, kadar serat, dan rapat optik yang mana data akan diolah menggunakan program Ms. Excell.  Metode yang digunakan adalah metode deskriptif yang menjelaskan hubungan penurunan volume air dengan pemampatan gambut pada tingkat kematanagn yang berbeda di Kawasan Gambut Berengbengkel Kalimantan Tengah Hasil penelitian menunjukkan bahwa penurunan volume air atau kadar lengas menyebabkan hilangnya volume spesifik pori sehingga mengakibatkan pemampatan tanah gambut. Pemampatan yang terjadi berbeda disetiap tingkat kematangan. Pemampatan pada setiap kematangan berbeda, gambut mentah (fibrik) akan lebih cepat atau mudah mengalami pemampatan dan melambat pada tanah gambut yang sudah mengalami kematangan, sehingga dapat disimpulkan bahwa penurunan volume air atau kadar lengas yang hilang dapat menyebabkan pemampatan dan subsiden pada tanah gambut  Kata Kunci : kematanagan gambut, kadar lengas, kadar serat, rapat optik . Peatlands are areas waterlogged throughout the year. The problems arise when natural peatlands are converted. The aim of the study was to find out the compression of peat due to a decrease in the volume of water at some different levels of maturity. The soil samples were taken from the peat area of Berengbengkel, Central Kalimantan. Each of 30 disturbed and undisturbed soil samples was analyzed for its moisture content, volumetric weight, fiber content, and optical density. The data were then processed using the program of Ms. Excell. The method used in the study was a descriptive method describing relationship between decrease in water volume and compression of peat at different maturity levels in peat area of berengbengkel, central kalimantan. The results showed that the decrease in water volume or moisture content led to the loss of specific pore volume, resulting in compression of peat. The compressions occurring at each maturity level were different from one another. Raw peat (fibric) was quicker or easier to experience compression than the peat soil that had already undergone maturation. Therefore, it can be concluded that the decrease in water volume or moisture content can cause compression and subsidence in peat soil. Keywords: fiber content, moisture content, peat maturity, optical density.

scholarly journals SIFAT FISIK GAMBUT PEDALAMAN PADA LABORATORIUM ALAM HUTAN GAMBUT SEBANGAU, KALIMANTAN TENGAHThe Physical Properties Of Inland Peat In Natural Laboratory Of Peat Swamp Forest (LAHG) Sebangau, Central Kalimantan

2021 ◽  
Vol 15 (2) ◽  
pp. 216
Author(s):  
Yonodius Paskalis Bay ◽  
Nina Yulianti ◽  
Suparno Suparno ◽  
Fengky Florante Adji ◽  
Zafrullah Damanik ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Moisture Content ◽  
Land Cover ◽  
Physical Properties ◽  
Bulk Density ◽  
Black Soil ◽  
Fiber Content ◽  
Soil Color ◽  
Central Kalimantan ◽  
Peat Area

Indonesia has the largest peat area in the tropical zone, which estimated about 21 million ha, with a percentage of 70% of the peat area in Southeast Asia and 50% of the world's tropical peatlands. This study aims to evaluate the physical properties of soil in each layer of soil and land cover in inland peat swamp forests in LAHG in Central Kalimantan. The research used the profile method (minipit) measuring 120 cm x 120 cm. Each location is given 3 plots on 2 (two) land cover  namely forest and burnt area. The research location is in LAHG. This research was conducted in July-December 2020. Samples were analyzed at the Banjarbaru Research and Development Laboratory. The parameters observed were bulk density, moisture content, fiber content, soil color, infiltration, and hydraulic conductivity. The research data were analyzed statistically by means of regression and correlation analysis. The results showed that the study of the physical properties of inland peat soil in the forest had bulk density ranging from 0.10 to 0.15 g / cm-3, moisture content 541.18-910.00%, fiber content 8-40%, infiltration -0 , 58-29.27 ml / hour, hydraulic conductivity 2.4-66.6 cm / hour with reddish black soil color. Whereas on burnt land, bulk density ranged from 0.10 to 0.15 g / cm-3, moisture content was 500.00-916.67%, fiber content was 12-52%, infiltration was -3.19-60.99 ml. / hr, hydraulic conductivity 2.4-30.6 cm / hr with dark black soil color. The study relationship pattern shows positive and negative.

Effect of Glass Fiber on Shear Strength of Soil

2018 ◽  
Vol 775 ◽  
pp. 603-609
Author(s):  
Himadri Shekhar Saha ◽  
Debjit Bhowmik
Keyword(s):  
Shear Strength ◽  
Internal Friction ◽  
Moisture Content ◽  
Glass Fiber ◽  
Water Content ◽  
Soil Samples ◽  
Fiber Content ◽  
Triaxial Tests ◽  
Angle Of Internal Friction ◽  
Increase With Increase

This paper investigates the effect of glass fiber reinforcement on the shear strength properties of the sand clay mixture. The soil samples were prepared by mixing 50% of locally available Barak river sand with 50% of local clay soil. Triaxial tests were conducted on the soil samples containing five different percentage of fiber to know the effect of fiber content on the shear strength of the soil. Unconsolidated Undrained (UU) Triaxial tests were conducted under three different confining pressures for each sample. Samples were prepared with five different values of moisture content considering 2% less than OMC (Optimum Moisture Content), 1% less than OMC, OMC, 1% more than OMC, and 2% more than OMC to study the effect of water content (w) on behavior of fiber reinforced soil. A parametric study has been carried out in this paper to know the effect of different influencing parameters on the cohesion value and angle of internal friction. The results show that the failure stress and angle of internal friction increase with increase in fiber content up to an optimum value then decrease. On the other hand, the cohesion value increases consistently with increase in fiber content. The study also indicates that the peak deviator stress, angle of internal friction and cohesion values increase with increase in water content up to an optimum value which is less than OMC then decrease with further increase in water content.

scholarly journals Spatial Dependence of Physical Attributes and Mechanical Properties of Ultisol in a Sugarcane Field

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Uilka Elisa Tavares ◽  
Mário Monteiro Rolim ◽  
Veronildo Souza de Oliveira ◽  
Elvira Maria Regis Pedrosa ◽  
Glécio Machado Siqueira ◽  
...  
Keyword(s):  
Moisture Content ◽  
Soil Texture ◽  
Sugar Cane ◽  
Spatial Dependence ◽  
Soil Health ◽  
Conventional Tillage ◽  
Soil Samples ◽  
Undisturbed Soil ◽  
Sandy Clay ◽  
Disturbed Soil

This study investigates the effect of conventional tillage and application of the monoculture of sugar cane on soil health. Variables like density, moisture, texture, consistency limits, and preconsolidation stress were taken as indicators of soil quality. The measurements were made at a 120 × 120 m field cropped with sugar cane under conventional tillage. The objective of this work was to characterize the soil and to study the spatial dependence of the physical and mechanical attributes. Then, undisturbed soil samples were collected to measure bulk density, moisture content and preconsolidation stress and disturbed soil samples for classification of soil texture, and consistency limits. The soil texture indicated that soil can be characterized as sandy clay soil and a sandy clay loam soil, and the consistency limits indicated that the soil presents an inorganic low plasticity clay. The preconsolidation tests tillage in soil moisture content around 19% should be avoided or should be chosen a management of soil with lighter vehicles in this moisture content, to avoid risk of compaction. Using geostatistical techniques mapping was possible to identify areas of greatest conservation soil and greater disturbance of the ground.

The relation between soil structure and solute transport under raised bed cropping and conventional cultivation in south-western Victoria

Soil Research ◽  
2007 ◽  
Vol 45 (8) ◽  
pp. 577 ◽  
Author(s):  
J. E. Holland ◽  
R. E. White ◽  
R. Edis
Keyword(s):  
Solute Transport ◽  
Soil Structure ◽  
Preferential Flow ◽  
Soil Samples ◽  
Water Volume ◽  
Undisturbed Soil ◽  
Resin Impregnation ◽  
Cultivated Soil ◽  
Raised Bed ◽  
Western Victoria

This study examined the relationship between soil structure and solute transport in a texture contrast soil under 2 different tillage treatments—raised beds and conventional cultivation—in south-western Victoria. Undisturbed soil samples were collected for resin-impregnation and image analysis. This enabled several descriptive parameters of macropore structure to be calculated. Large, undisturbed soil samples were also collected for a solute transport experiment using a KCl solution. A convective log-normal transfer function was used to model Cl– movement. The assessment of soil structure showed that the raised beds contained a better connected pore network than the conventionally cultivated soil. Solute transport was faster through the raised bed soil when close to saturation (at –5 mm tension). Under these conditions, the solute transport parameters showed a smaller ratio of transport volume to soil water volume in the raised bed than the conventionally cultivated soil. Together, these data strongly indicate that the raised beds had greater pore connectivity and were able to transmit solute faster and more efficiently than the conventionally cultivated soil. It is concluded that raised bed soils are better structured and provide less risk from waterlogging than conventionally cultivated soils. However, there is greater potential for preferential flow of pesticides and solutes in raised bed soils.

scholarly journals Identifikasi Cendawan Mikoriza arbuskular (CMA) pada Beberapa Tekstur

Buletin Palma ◽  
2016 ◽  
Vol 16 (2) ◽  
pp. 203
Author(s):  
ENGELBERT MANAROINSONG ◽  
A. A. LOLONG
Keyword(s):  
Soil Texture ◽  
Oil Palm ◽  
Soil Microorganisms ◽  
Peat Soil ◽  
Arbuscular Mycorrhizal ◽  
Soil Samples ◽  
Font Size ◽  
Central Kalimantan ◽  
Purposive Sampling ◽  
Palm Trees

<p><span style="font-size: medium;">ABSTRAK </span></p><p>Tanaman kelapa sawit ditanam hampir pada semua jenis tanah seperti gambut, liat berlempung dan lempung berpasir dengan proporsi kandungan tiap tekstur tanah berbeda-beda dilapangan. Cendawan mikoriza arbuskular (CMA) merupakan mikroorganisme tanah yang berperan sebagai mikroba perombak, membantu tanaman dalam penyerapan unsur hara dari tanah. Penelitian ini bertujuan mengidentifikasi jenis dan populasi spora mikoriza pada beberapa tekstur tanah dipertanaman kelapa sawit. Penelitian dilakukan pada 3 (tiga) lokasi perkebunan kelapa sawit di Kabupaten Sampit, Kalimantan Tengah, yaitu di lahan PT. Sapta Karya Damai (SKD), PT. Agro Bukit dan areal pertanaman kelapa dan kelapa sawit milik petani di Samuda besar. Penelitian dilaksanakan pada bulan Maret sampai dengan Juni 2015. Pengambilan contoh tanah dilakukan secara Purposive Sampling. Analisis contoh tanah dilakukan di  Laboratorium Pengujian Balittro - Bogor. Parameter yang diamati, yaitu pH, kelembaban tanah, jenis dan jumlah populasi spora mikoriza. Hasil penelitian menunjukan bahwa mikoriza yang ditemukan adalah dari jenis Glomus dengan populasi bervariasi menurut jenis tanah, yaitu berkisar antara 175,3 - 283 buah per 100 mg tanah. Populasi tertinggi, yaitu 283 spora per 100 mg tanah  ditemukan pada jenis tanah gambut di perkebunan kelapa sawit PT. Agro Bukit yang belum berproduksi (umur &lt;5 tahun). Populasi terendah, yaitu 175,3 spora per 100 mg tanah ditemukan pada tektur tanah liat berlempung di lokasi perkebunan kelapa sawit PT. Agro Bukit yang telah berproduksi normal (umur <br /> &gt;10 tahun).</p><p>Kata kunci : Cendawan, mikoriza, tekstur, tanah, kelapa sawit.</p><p> </p><p><strong><span style="font-size: medium;">Identification of The Fungie Micorhyza Asbuscular on Saveral Soil Textures <br />at Oilpalm Plantation, Central Kalimantan </span></strong></p><p><span style="font-size: medium;">ABSTRACT </span></p><p>Oil palm trees planted in virtually all types of soil such as peat, clay and sandy clay with argillaceous proportion of the content of each soil texture is different in the field. Arbuscular mycorrhizal fungie (FAM) is a soil microorganisms that act as microbial crusher, helps plants to absorb nutrients from the soil. This study aims to identify the types and populations of mycorrhizal spores in soil texture on oilpalm plantation. The study was conducted at three (3) locations oil palm plantations in the district of Sampit, Central Kalimantan, namely in te area of PT. Sapta Karya Damai (SKD), PT. Agro Bukit and coconut plantations and oil palm farmers in Samuda Besar. The experiment was conducted in March and June 2015. Soil sampling is purposive sampling. Analysis of soil samples carried out in the Laboratory Testing Balittro - Bogor. The parameters observed were pH, soil moisture, type and number of mycorrhizal spores population. The results showed that mycorrhizae are found are of the type Glomus with a population varies according to the type of soil ranged between 175.3 to 283 pieces per 100 mg of soil. The highest population, namely 283 spores per 100 mg of soil found in the peat soil types in PT. Agro Bukit oil palm plantations wihich is not yet in production (&lt;5 years). Lowest population is 175.3 per 100 mg of spores found in soil texture argillaceous clay in PT. Agro Bukit oil palm plantations who have production (&gt;10 years).</p>Keywords : Fungi, michorrizal,textur, soil, oil palm.

scholarly journals Factorial design study of total petroleum contaminated soil treatment using land farming technique

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Ehizonomhen S. Okonofua ◽  
Kayode H. Lasisi ◽  
Eguakhide Atikpo
Keyword(s):  
Moisture Content ◽  
Factorial Design ◽  
Contaminated Soil ◽  
Soil Samples ◽  
Optimization Techniques ◽  
Cow Dung ◽  
Optimum Point ◽  
Input Parameters ◽  
Substrate Moisture ◽  
Land Farming

AbstractLand farming technique was used to treat hydrocarbon contaminated soil collected from a crude oil spill sites in Edo State, Nigeria. Calibrated standard auger was used to collect soil samples from the site at depth below 30 cm. The samples were characterized and classified. Cow dung and NPK fertilizer were added as additives to complement the nutriments of the soil samples before total petroleum hydrocarbon (TPH) quantification and remediation procedures. Factorial design was applied to vary the input parameters such as pH, mass of substrate, moisture content and turning times of land farming so to ascertain the optimal conditions for the procedure. The result revealed that the in-situ TPH value was 5000 mg kg− 1 on the average and after 90 d of treatment, TPH reduced to 646 mg kg− 1. The turning rate, pH, moisture content and mass of substrate hade 83, 4.36, 0.48 and 0.046% contribution, respectively, for the degradation process using land farming treatment. Numerical optimization techniques applied in the optimum point for land farming input parameters to achieve predicted maximum removal of 99% were evaluated as pH, mass of substrate, moisture content and turning rate to be 6.01, 1 kg, 10% and 5 times in a week, respectively. TPH removed at this optimum point was 98% reducing from 5000 to 636 mg kg− 1. The high coefficient of determination (r2 = 0.9865) as observed in the closeness of predicted and experimental values reflects the reliability of the model and hence, land farming practice with close attention on turning rate as revealed by this study, is recommended for TPH contaminated soil remediation.

scholarly journals Fungal N2O production in an arable peat soil in Central Kalimantan, Indonesia

2007 ◽  
Vol 53 (6) ◽  
pp. 806-811 ◽  
Author(s):  
Yosuke Yanai ◽  
Koki Toyota ◽  
Tomoaki Morishita ◽  
Fumiaki Takakai ◽  
Ryusuke Hatano ◽  
...  
Keyword(s):  
Peat Soil ◽  
N2o Production ◽  
Central Kalimantan

scholarly journals Least limiting water range of Udox soil under degraded pastures on different sun-exposed faces

2017 ◽  
Vol 31 (3) ◽  
pp. 393-400 ◽  
Author(s):  
Renato Ribeiro Passos ◽  
Liovando Marciano da Costa ◽  
Igor Rodrigues de Assis ◽  
Danilo Andrade Santos ◽  
Hugo Alberto Ruiz ◽  
...  
Keyword(s):  
Soil Management ◽  
Sun Exposure ◽  
Soil Samples ◽  
The South ◽  
Undisturbed Soil ◽  
North West ◽  
The North ◽  
Pasture Degradation ◽  
Least Limiting Water Range ◽  
Degraded Pastures

AbstractThe efficient use of water is increasingly important and proper soil management, within the specificities of each region of the country, allows achieving greater efficiency. The South and Caparaó regions of Espírito Santo, Brazil are characterized by relief of ‘hill seas’ with differences in the degree of pasture degradation due to sun exposure. The objective of this study was to evaluate the least limiting water range in Udox soil under degraded pastures with two faces of exposure to the sun and three pedoenvironments. In each pedoenvironment, namely Alegre, Celina, and Café, two areas were selected, one with exposure on the North/West face and the other on the South/East face. In each of these areas, undisturbed soil samples were collected at 0-10 cm depth to determine the least limiting water range. The exposed face of the pasture that received the highest solar incidence (North/West) presented the lowest values in least limiting water range. The least limiting water range proved to be a physical quality indicator for Udox soil under degraded pastures.

scholarly journals Populasi Serangga Penyerbuk Kelapa Sawit Elaeidobius kamerunicus Faust dan Pengaruhnya terhadap Nilai Fruit Set pada Tanah Berliat, Berpasir dan Gambut di Kalimantan Tengah, Indonesia

Agrikultura ◽  
2017 ◽  
Vol 28 (1) ◽  
Author(s):  
Fizrul Indra Lubis ◽  
Sudarjat Sudarjat ◽  
Danar Dono
Keyword(s):  
Sandy Soil ◽  
Fruit Set ◽  
Clay Soil ◽  
Peat Soil ◽  
Soil Types ◽  
Palm Fruit ◽  
Central Kalimantan ◽  
Palm Weevil ◽  
Elaeidobius Kamerunicus ◽  
Set Value

ABSTRACTPopulation of soil palm weevil pollinator Elaeidobius kamerunicus FAUST and its impact on fruit setvalue at clay, sandy and peat soil types in central Kalimantan, di IndonesiaOil palm weevil pollinator Elaeidobius kamerunicus Faust plays an important role in the increasing oilpalm fruit set value. Along with the development of oil palm, fruit set problems occurred in recentdecades in some parts of Indonesia. An experiment was carried out on a seven years old oil palmplantation located at Selangkun Estate, Kotawaringin Barat, Central Kalimantan, Indonesia to find outthe influence of population E. kamerunicus on pollination efficiency at clay, sandy and peat soil types.Relative to other soil types, a high weevil population on male (50,811 weevils/ha ; 72 weevils/spikelet)and female (219 weevils) inflorescences had been recorded at clay soil. Fruit set value on clay soil 58.9%and significantly different with sandy soil of 49.8% and peat soil of 46.4%. Population E. kamerunicusper ha influenced fruit set value at clay, sandy and peat soil types. Number of E. kamerunicus visitedfemale inflorescences did not influenced fruit set value at clay, sandy and peat soil types.Keywords: Clay soil, Elaeidobius kamerunicus, fruit set, peat soil, population, sandy soil ABSTRAKSerangga penyerbuk kelapa sawit Elaeidobius kamerunicus FAUST berperan penting dalam peningkatannilai fruit set kelapa sawit. Seiring dengan perkembangan kelapa sawit, adanya permasalahan nilai fruitset telah terjadi dalam beberapa kurun waktu di beberapa wilayah Indonesia. Penelitian dilakukan diperkebunan kelapa sawit yang telah berumur tujuh tahun, berlokasi di Selangkung, Kotawaringin Barat,Kalimantan Tengah, Indonesia dan bertujuan untuk mengetahui pengaruh populasi E. Kamerunicusterhadap efisiensi penyerbukan pada tipe tanah liat, pasir dan gambut. Berdasarkan tipe tanahdilaporkan bahwa tingginya populasi kumbang pada bunga jantan yaitu (50.811 kumbang/ha; 72kumbang/spikelet) dan bunga betina yang sedang mekar (219 kumbang) pada tipe tanah berliat.Adapun, nilai fruit set pada tanah liat sebesar 58,9% dan berbeda nyata dibandingkan dengan tanahberpasir (49,8%) dan gambut (46,4%). Populasi E. kamerunicus per ha berpengaruh terhadap nilai fruitset pada tipe tanah liat, pasir dan gambut. Namun, jumlah E. kamerunicus yang mengunjungi bungabetina yang sedang mekar tidak berpengaruh terhadap nilai fruit set pada tipe tanah liat, pasir dangambut.Kata Kunci : Elaeidobius kamerunicus, Fruit set , Populasi, Tanah Gambut, Tanah liat, Tanah Pasir

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