scholarly journals Pengaruh Kelas Kemiringan dan Posisi Lereng terhadap Ketebalan Lapisan Olah, Kandungan Bahan Organik, Al dan Fe pada Alfisol di Desa Gunungsari Kabupaten Tasikmalaya

Agrikultura ◽  
2019 ◽  
Vol 29 (3) ◽  
pp. 136
Author(s):  
Fetty Rahmayanti ◽  
Mahfud Arifin ◽  
Ridha Hudaya
Keyword(s):  
Organic Matter ◽  
Comparative Analysis ◽  
Land Cover ◽  
Organic Material ◽  
Sampling Technique ◽  
Slope Position ◽  
Survey Method ◽  
Slope Gradient ◽  
Layer Depth ◽  
Depth Layer

ABSTRACTEffect of slope gradient and its position to plow depth layer, organic matter, Al and Fe contentsThis research was done to know the influence of slope gradient and its position to plow depth layer, organic matter, Al and Fe contents. This research was carried out January-March 2011. The research used survey method with descriptive comparative analysis with free physiographic approach based on land cover. Sampling technique was used a purposive stratified sampling. Soil sampel took from three slope gradients: 8-15%, 16-25% and 26-40% with three position of crest, middle and lower positions. The result showed that the gradient of slope and its position have influenced plow layer depth and content of iron but organic material and Al were not influenced. The highest of plow layer depth and content of iron were occured at 8-15%, while the highest of content of Al and iron were occured at 16-25 %. Based on slope position, the thick of plow layer, the content of organic matter, Fe wereoccured highest in the lower position and Al was occured in the middle position.Keywords: Slope, plow depth layer, organic matter, Al, FeABSTRAKPenelitian ini dilakukan untuk mengetahui adanya pengaruh dari kelas kemiringan dan posisi lereng terhadap ketebalan lapisan olah, bahan organik, Al dan Fe. Penelitian dilakukan pada bulan Januari-Maret 2011 dengan menggunakan metode survai dan analisis deskriptif komparatif melalui pendekatan fisiografis secara bebas berdasarkan penampakan fisiografis lahan. Teknik sampling berdasarkan metode sampel pertimbangan dalam stratifikasi. Contoh tanah diambil dari tiga kelas kemiringan lereng : 8-15%, 16-25% dan 26-40% dengan tiga posisi lereng yaitu posisi atas, posisi tengah dan posisi bawah. Hasil penelitian menunjukkan bahwa kemiringan dan posisi lereng berpengaruh terhadap ketebalan lapisan olah dan kandungan Fe sedangkan terhadap bahan organik dan kandungan Al tidak berpengaruh. Ketebalan lapisan olah dan bahan organik tertinggi dijumpai pada kemiringan lereng 8-15% sedangkan kandungan Al dan Fe tertinggi yaitu pada kemiringan lereng 16-25%. Berdasarkan posisi lerengnya, ketebalan lapisan olah, bahan organik, kandungan Fe tertinggi dijumpai pada posisi lereng bawah sedangkan kandungan Al pada posisi lereng tengah.Kata Kunci: Lereng, Ketebalan lapisan olah, Bahan organik, Al, Fe

scholarly journals Pengaruh Kelas Kemiringan dan Posisi Lereng terhadap Ketebalan Lapisan Olah, Kandungan Bahan Organik, Al dan Fe pada Alfisol di Desa Gunungsari Kabupaten Tasikmalaya

Agrikultura ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 136
Author(s):  
Fetty Dwi Rahmayanti ◽  
Mahfud Arifin ◽  
Rida Hudaya ◽  
Apong Sandrawati
Keyword(s):  
Organic Matter ◽  
Comparative Analysis ◽  
Land Cover ◽  
Organic Material ◽  
Sampling Technique ◽  
Slope Position ◽  
Survey Method ◽  
Slope Gradient ◽  
Layer Depth ◽  
Depth Layer

ABSTRACTEffect of slope gradient and its position to plow depth layer, organic matter, Al and Fe contents in alfisol soil located at Gunungsari Village, Tasikmalaya RegencyThis research was done to know the influence of slope gradient and its position to plow depth layer, organic matter, Al and Fe contents. This research was carried out January-March 2011. Theresearch used survey method with descriptive comparative analysis with free physiographic approach based on land cover. Sampling technique was used a purposive stratified sampling. Soil sampel took from three slope gradients: 8-15%, 16-25% and 26-40% with three position of crest, middle and lower positions. The result showed that the gradient of slope and its position have influenced plow layer depth and content of iron but organic material and Al were not influenced. The highest of plow layer depth and content of iron were occured at 8-15%, while the highest of content of Al and iron were occured at 16-25 %. Based on slope position, the thick of plow layer, the content of organic matter, Fe were occured highest in the lower position and Al was occured in the middle position.Keywords: Slope, plow depth layer, organic matter, Al, FeABSTRAKPenelitian ini dilakukan untuk mengetahui adanya pengaruh dari kelas kemiringan dan posisi lereng terhadap ketebalan lapisan olah, bahan organik, Al dan Fe. Penelitian dilakukan pada bulan Januari-Maret 2011 dengan menggunakan metode survai dan analisis deskriptif komparatif melalui pendekatan fisiografis secara bebas berdasarkan penampakan fisiografis lahan. Teknik sampling berdasarkan metode sampel pertimbangan dalam stratifikasi. Contoh tanah diambil dari tiga kelas kemiringan lereng : 8-15%, 16-25% dan 26-40% dengan tiga posisi lereng yaitu posisi atas, posisi tengah dan posisi bawah. Hasil penelitian menunjukkan bahwa kemiringan dan posisi lereng berpengaruh terhadap ketebalan lapisan olah dan kandungan Fe sedangkan terhadap bahan organik dan kandungan Al tidak berpengaruh. Ketebalan lapisan olah dan bahan organik tertinggi dijumpai pada kemiringan lereng 8-15% sedangkan kandungan Al dan Fe tertinggi yaitu pada kemiringan lereng 16-25%. Berdasarkan posisi lerengnya, ketebalan lapisan olah, bahan organik, kandungan Fe tertinggi dijumpai pada posisi lereng bawah sedangkan kandungan Al pada posisi lereng tengah.Kata Kunci: Lereng, Ketebalan lapisan olah, Bahan organik, Al, Fe

scholarly journals HUBUNGAN KANDUNGAN NITRAT DAN FOSFAT PADA AIR DAN SEDIMEN TERHADAP KERAPATAN LAMUN DI PANTAI PRAWEAN BANDENGAN, JEPARA Relationship The Content of Nitrates and Phosphates in Water and Sediment to The Density Seagrass at Prawean Bandengan Beach, Jepara

2020 ◽  
Vol 8 (4) ◽  
pp. 291-299
Author(s):  
Heny Setiani ◽  
Anhar Solichin ◽  
Norma Afiati
Keyword(s):  
Organic Matter ◽  
Growth And Development ◽  
Chemical Elements ◽  
Sampling Technique ◽  
Correlation Factor ◽  
Survey Method ◽  
Purposive Sampling ◽  
Water And Sediment ◽  
The Relationship ◽  
Seagrass Density

Zat hara nitrat dan fosfat merupakan unsur kimia yang sangat penting untuk mendukung pertumbuhan dan perkembangan lamun. Penyerapan nutrien pada kolom air dilakukan oleh daun sedangkan penyerapan nutrien dari sedimen dilakukan oleh akar. Ketersediaan nitrat dan fosfat pada air dan sedimen dipengaruhi oleh ketersediaan bahan organik yang berasal dari aktivitas manusia maupun dari perairan itu sendiri. Penelitian ini dilaksanakan pada bulan Mei 2019. Tujuan dari penelitian ini adalah untuk mengetahui jenis dan kerapatan lamun, kandungan nitrat dan fosfat pada air dan sedimen serta hubungannya terhadap kerapatan lamun. Metode yang digunakan yaitu metode survei dengan teknik purposive sampling. Analisis data menggunakan IBM SPSS Statistics 23. Hasil dari penelitian ini adalah terdapat 5 jenis lamun di Pantai Prawean dengan kerapatan berkisar antara 277 – 421 tegakan/m2 yang masuk dalam kategori sedang hingga rapat. DO berkisar 3,4-5,8 mg/l dan rata-rata bahan organik berkisar 6,34-6,64 mg/l. Rata-rata kandungan nitrat dan fosfat sedimen lebih tinggi dibanding pada air yakni masing-masing berkisar 0,43-0,88 mg/l dan 0,12-0,27 mg/l. Kandungan nitrat dan fosfat pada sedimen memiliki korelasi kuat terhadap kerapatan lamun dengan angka korelasi masing-masing sebesar 0,875 dan 0,718. Hubungan antara nitrat dan fosfat sedimen dengan kerapatan lamun mempunyai angka determinansi regresi (R2) sebesar 0,767 yang berarti kedua nutrien mempunyai pengaruh sebesar 76,7 % terhadap kerapatan lamun. ABSTRACT Nitrate and phosphate are very important chemical elements to support the growth and development of seagrass. Nutrient absorption in the water column is carried out by leaves while absorption of nutrients from sediments is carried out by the roots. The availability of nitrate and phosphate in the water and sediments is influenced by the availability of organic materials derived from human activities as well as from the waters themselves. The research was conducted in May 2019. The purpose of this study was to determine the type and density of seagrass, the content of nitrate and phosphate in water and sediments and their relationship to seagrass density. Survey method with purposive sampling technique were used. Data analysis using IBM SPSS Statistics 23. The results of this study are that there are 5 types of seagrasses on Prawean Beach with densities ranging from 277 - 421 ind/m2 in the medium to tight category. DO ranges from 3.4-5.8 mg/l and the average organic matter ranges from 6.34 to 6.64 mg/l. The average sediment content of nitrate and phosphate is higher than in water, each of which ranges from 0.43-0.88 mg/l and 0.12-0.27 mg/l. The content of nitrate and phosphate in sediments has a strong correlation with seagrass density with correlation factor of 0.875 and 0.718 respectively.  The relationship between nitrate and phosphate sediment with seagrass density has a regression determinant (R2) of 0.767 which means that both nutrients have an effect of 76.7% on seagrass density. 

scholarly journals Estimate of Changes in Carbon Stocks Based on Land Cover Changes in the Leuser Ecosystem Area (LEA) Indonesia

2016 ◽  
Vol 29 (2) ◽  
pp. 188 ◽  
Author(s):  
Dedi Hermon
Keyword(s):  
Land Cover ◽  
Spatial Model ◽  
Sampling Technique ◽  
Allometric Equation ◽  
Carbon Stocks ◽  
Survey Method ◽  
Land Cover Changes ◽  
Gis Analysis ◽  
Tree Biomass ◽  
Landsat 7

This research aimed at designing the model of land cover changes in 1990 and 2014, and estimating carbon stock changes in each land cover in Leuser Ecosystem Area (LEA). The spatial model of land cover changes was analyzed by interpreting Landsat 5 TM imagery in 1990 and Landsat 7 ETM+ imagery in 2014 with ERDAS 9.1 and Land Change Modeller (LCM) in Idrisi TerrSet v.18. The analysis of land area changes (ha) in each land cover from 1990 to 2014 used ERDAS 9.1 with tools Interpreter (GIS Analysis-Matrix). Systematic survey method was employed in order to analyze carbon stocks. The sampling technique was stratified purposive composite sampling which used plot technique. The estimate of tree biomass used allometric equation. The estimate of carbon stocks in each land cover in 1990 was measured based on the total of carbon stocks in 2014 which was conversed with the areas of each land cover in 1990. Spatial model of land cover changes in LEA in 1990-2014 showed the changes of area in each land cover which caused the changes of carbon stocks in each land cover as well.

scholarly journals HUBUNGAN KELIMPAHAN EPIFAUNA DENGAN TINGKAT KERAPATAN LAMUN YANG BERBEDA DI PERAIRAN BANDENGAN JEPARA

2016 ◽  
Vol 5 (4) ◽  
pp. 249-257
Author(s):  
Sonia Wulan ◽  
Siti Rudiyanti ◽  
Bambang Sulardiono
Keyword(s):  
Organic Matter ◽  
Random Sampling ◽  
Sampling Technique ◽  
Close Correlation ◽  
Survey Method ◽  
Density Level ◽  
Organic Particles ◽  
Relationship Of ◽  
The Relationship ◽  
Seagrass Density

ABSTRAK Ekosistem padang lamun di Perairan Bandengan Jepara penting bagi biota akuatik khususnya epifauna. Kerapatan lamunakan mempengaruhi bahan organik yang digunakan oleh epifauna, selain itu kerapatan lamun juga dapat mengendapkan bahan organik yang akan mempengaruhi kelimpahan epifauna. Penelitian dilakukan pada bulan Maret 2016 di Perairan Bandengan yang bertujuan untuk mengetahui hubungan antara kelimpahan epifauna dengan kerapatan lamun yang berbeda di Perairan Bandengan Jepara serta hubungan antara kandungan bahan organik dengan tingkat kerapatan lamun di Perairan Bandengan Jepara. Metode penelitian yang digunakan yaitu pendekatan survei dengan metode sampling yaitu Purposive Random sampling. Hasil penelitian menunjukkan terdapat 1 jenis lamun yang ditemukan di Pantai Bandengan  yaitu Thalassia sp. dengan kerapatan pada stasiun jarang (A) 178 ind/m2, stasiun padat (B) 368 ind/m2. Kelimpahan epifauna di kerapatan jarang dan padat di Perairan bandengan 140 ind/3m2, dan 91 ind/3m2. Rerata kandungan bahan organik sedimen pada kerapatan jarang, dan padat berturut-turut adalah 12.86% dan 76.85%.Berdasarkan hasil uji regresi menunjukkan antara kelimpahan epifauna dengan tingkat kerapatan lamun menunjukkan hubungan tidak searah, setiap kenaikkan kerapatan lamun tidak diikuti oleh kenaikkan kelimpahan epifauna, serta tingkat kerapatan lamun dengan bahan organik terdapat korelasi yang kuat, semakin tinggi tingkat kerapatan lamun akan diikuti oleh bahan organik.  Kata Kunci; Perairan Bandengan; Kerapatan Lamun; Kelimpahan Epifauna; Bahan Organik.  ABSTRACT Seagrass ecosystem in Bandengan coastal Jepara is important for epifauna. Different seagrass density will affect levels of organic matter used epifauna, in addition the density of seagrass can also precipitate organic particles which affect the abundance of epifauna. This research was conducted on March 2016. The aimed of this research was to determine the relationship of epifauna’s abundance to density seagrass and the relationship of organic matter to the density of seagrass. This research used survey method and random sampling technique. Samples were taken from three different station there are (A) sparse density, and (B) dense density. Sample epifauna were taken once a week for three time. The results showed only 1 type of seagrass found in Bandengan coastal Jepara that is Thalassia sp. With density on sparse station (A) 178ind/m2, dense station 368 ind/m2. The abundance of epifauna on station sparse (A) 140 ind/3m2, dense station (B) 91 ind/3m2, The highest abundance Sconsia sp 52 ind/m2 dan 28 ind/m2 and Cerithium sp 34 ind/m2 dan 19 ind/m2Organic material content of sedimen on density was sparse and dense was 5.71%, 9.81%. Based on the result of the correlation show that between the abundance of epifauna with seagrass density level there is a relation undirectional, density of seagrass will not increase accordingly to the abundance of epifauna, as well as to the content of organic matter. There is a close correlation that higher of density of seagrass will be followed by organic matter. Key Word; Coastal of Bandengan; Seagrass Beds Density; Abundance of Epifauna; Organic matter

scholarly journals ANALISIS HUBUNGAN TOTAL BAKTERI, BAHAN ORGANIK TERLARUT, NITRAT DAN FOSFAT DI PERAIRAN MOROSARI, DEMAK

2018 ◽  
Vol 7 (4) ◽  
pp. 379-386
Author(s):  
Rijal Galih Amta Nursubekhi ◽  
Niniek Widyorini ◽  
Oktavianto Eko Jati
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Sampling Technique ◽  
Nutrient Content ◽  
Survey Method ◽  
Purposive Sampling ◽  
Fishing Boat ◽  
Dissolved Organic Matters ◽  
Boat Traffic ◽  
The Relationship

Perairan Morosari terletak di wilayah Kabupaten Demak. Perairan ini telah banyak dimanfaatkan masyarakat sekitar untuk berbagai macam aktivitas seperti pembuangan limbah domestik maupun industri, jalur lalu lintas perahu nelayan, kawasan wisata dan kegiatan perikanan baik budidaya maupun tangkap. Limbah yang dibuang langsung ke perairan ini diperkirakan telah menyebabkan terjadinya peningkatan kandungan nutrien, seperti bahan organik, nitrat dan fosfat di perairan Morosari, Demak. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan total bakteri, bahan organik terlarut, nitrat, dan fosfat di Perairan Morosari, Demak. serta mengetahui hubungan antara total bakteri dengan bahan organik terlarut, nitrat dan fosfat di Perairan Morosari, Demak. Penelitian ini dilaksanakan pada bulan Mei 2018. Metode yang digunakan dalam penelitian ini adalah metode survei dan teknik pengambilan sampel menggunakan metode purposive sampling yang dilakukan pada lima stasiun. Hasil penelitian menunjukkan nilai total bakteri berkisar <1x101 – 3,6x1011 CFU/ml, bahan organik terlarut 12,77 – 33,81 mg/l, nitrat 4,43 – 7,97 mg/l, fosfat 0,099 - 2,112 mg/l. Morosari Waters is located in Demak Regency. This waters have been widely used by the surrounding community for various activities such as the disposal of domestic and industrial waste, fishing boat traffic lanes, tourist areas and fishing activities both aquaculture and capture. Waste that directly enters  the water is thought to have caused an increase in nutrient content, such as organic matter, nitrate and phosphate in the waters of Morosari, Demak. The purpose of this study was to determine the total abundance of bacteria, dissolved organic matters, nitrate and phosphate in waters of Morosari, Demak. and knowing the relationship between total bacteria and dissolved organic matter, nitrate and phosphate in waters of Morosari, Demak. This research was carried out in May 2018. The method used in this research was survey method and the sampling technique used was purposive sampling method which was carried out at five stations. The results showed the total value of bacteria ranged from <1 x 101 – 3.6 x 1011 CFU / ml, dissolved organic matter 12.77 – 33.81 mg / l, nitrate 4.43 – 7.97 mg / l, phosphate 0.099 – 2,112 mg / l.

scholarly journals KANDUNGAN BAHAN ORGANIK SEDIMEN DAN KADAR H2S AIR DI DALAM DAN DI LUAR TEGAKAN MANGROVE DESA BEDONO, KABUPATEN DEMAK

2018 ◽  
Vol 7 (1) ◽  
pp. 78-85
Author(s):  
Halimatus Sa’diyah ◽  
Norma Afiati ◽  
Pujiono Wahyu Purnomo
Keyword(s):  
Organic Matter ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Organic Material ◽  
Organic Materials ◽  
Current Speed ◽  
Survey Method ◽  
Water Sampling ◽  
Mangrove Area ◽  
Surrounding Environment

Kawasan mangrove dapat memproduksi bahan organik dari proses dekomposisi serasah yang jatuh yang menjadi penyuplai nuterien ke lingkungannya. Proses tersebut menggunakan oksigen terlarut yang apabila oksigen terlarut habis maka proses tersebut beralih ke proses dekomposisi secara anaerob yang menyebabkan terbentuknya senyawa H2S. Penelitian ini bertujuan untuk mengetahui perbedaan kandungan bahan organik sedimen dan kadar H2S air di dalam dan di luar kawasan mangrove serta untuk mengetahui hubungan kandungan kadar H2S air dengan bahan organik sedimen dan oksigen terlarut di kawasan mangrove desa Bedono. Metode penelitian adalah metode survey. Penelitian ini dilakasanakn pada bulan Mei- Juni 2017 di lokasi yang mewakili kawasan mangrove dan lingkungan sekitarnya. Data yang diukur adalah suhu air, kecerahan, kedalaman, kecepatan arus, oksigen terlarut, pH, bahan organik sedimen dan H2S air yang dilaksanakan empat kali dengan selang pengukuran dua minggu. Hasil yang didapat yaitu suhu air 28-31oC, kecerahan 14,5-68 cm, kedalaman 33-165 cm, kecepatan arus 0-0,1 m/s, oksigen terlarut , pH 5-6, bahan organik sedimen 7,73-20,27%, H2S air 0,003-0,037 mg/l. Kandungan bahan organik sedimen dan kadar H2S air tertinggi di dalam kawasan mangrove dengan rata-rata 16,36% dan 0,031 mg/l, dan terendah di luar kawasan mangrove dengan rata-rata 9,78% dan 0,01 mg/l. Kadar H2S tinggi di dalam kawasan mangrove dan lebih rendah di luar kawasan mangrove. Kadar H2S air dengan bahan organik sedimen dan oksigen terlarut berhubungan linier dengan persamaan H2S= 0,027 + 0,001BOS- 0,006 DO (r= 0,7246, BOS= Bahan Organik Sedimen, DO= Dissolved Oxygen). Mangroves produce organic matter from the decomposition of falling leaves, twigs etc, which supply nutrient to the environment. The process uses dissolved oxygen; when dissolved oxygen exhausted, it switches into anaerobic decomposition which causes the formation of H2S compounds. This study aims to knowing differences in sediment organic materials and H2S within and adjacent of mangrove areas and to determine the relation of H2S with sediment organic materials and dissolved oxygen in the mangrove areas of Bedono. Survey method is refered, and the study was conducted in May - June 2017 on locations representing mangrove areas and the surrounding environment. The data measured are water temperature, brightness, depth, current speed, dissolved oxygen, pH, sediment organic materials and H2S in the water. Sampling was conducted four times every fortnight. The result of the water temperature is  28-31 ° C, brightness 14.5 to 68 cm, 33-165 cm depth, current speed 0-0.1 m/s, dissolved oxygen 2-5,2 mg/l, pH 5-6, sediment organic material 7,73 to 20.27%, H2S 0.003 to 0.037 mg/l. Sediment organic materials and H2S were highest within the mangrove area, with an average 16.36% and 0.031 mg/l, and the lowest outside of mangrove area with an average 9.78% and 0.01 mg/l. H2S higher in the inside of  the mangrove areas compared to the outside of it. The relation of H2S with sediment organic materials and dissolved oxygen is linearly related according to the equation H2S= 0.027+ 0.001SOM- 0.006DO (r= 0.7246, SOM= Sediment Organic Materials, DO= Dissolved Oxygen).

scholarly journals Slope position and management practices as factors influencing selected properties of topsoil

2019 ◽  
Vol 70 (2) ◽  
pp. 137-146
Author(s):  
Vladimír Šimanský ◽  
Martin Juriga ◽  
Łukasz Mendyk
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Properties ◽  
Soil Structure ◽  
Management Practices ◽  
Soil Management ◽  
Slope Position ◽  
Structure Parameters ◽  
Slope Gradient ◽  
Mean Weight Diameter

Abstract An interaction between the slope position and type of soil management practices could be one of the most important factor affecting several soil properties including soil structure. Therefore, we evaluated selected soil properties including soil structure parameters in relation to slope gradient and soil management practices between Trakovice and Bučany villages (western Slovakia). The sampling sites were located in two adjacent, gently sloping fields with a NW-SE orientation. The sites also differ in soil management type: Field No. 1 was used as arable land with intensive cultivation (IC) of crops, while a greening system (GS) had been established on Field No. 2. Soil samples were taken from five geomorphological zones at each slope: summit, shoulder, back-slope, toe slope and flat terrain under the slope. Results showed that soil pH, content of soil organic matter (SOM) and carbonates depended on land use of the slopes. In GS, the water-stable macro-aggregates (WSAma) 0.5–3 mm (favourable size fraction) displayed statistical significant quadratic polynomial trend along the slope gradient. In IC the values of mean weight diameter of dry sieved aggregates (MWDd) decreased significantly along the slope gradient, while in GS the opposite trend was observed. In IC significant correlations between carbonates content (r=-0.775, P<0.01), humic acids (HA) content (r=0.654, P<0.05), colour quotients of humic substances (r=-0.706, P<0.05), colour quotients of HA (r=-0.723, P<0.05) and MWDd were determined. In GS higher content of carbonates was followed by a decrease in content WSAma, MWDd, mean weight diameter of wet sieved aggregates (MWDw) and stability index of aggregates. At the same time stabile and labile soil organic matter improved soil structure parameters in GS.

scholarly journals Hubungan antara Kemiringan dan Posisis Lereng dengan Tekstur Tanah, Permeabilitas dan Erodibilitas Tanah pada Lahan Tegalan di Desa Gunungsari, Kecamatan Cikatomas, Kabupaten Tasikmalaya

Agrikultura ◽  
2015 ◽  
Vol 26 (1) ◽  
Author(s):  
Henly Yulina ◽  
Daud Siliwangi Saribun ◽  
Zulkarnaen Adin ◽  
Muhammad Hilda Rizki Maulana
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Agricultural Practices ◽  
Slope Position ◽  
Survey Method ◽  
Soil Permeability ◽  
Dry Land ◽  
Study Techniques ◽  
The Village ◽  
Source Of Information

ABSTRACTRelationship between slope and position of the slopes with soil texture, organic matter, soil permeability anderodibility on dry land in the Gunungsari Village,Cikatomas Sub District, Tasikmalaya DistrictIndonesia has a lot of potential lands especially for agricultural uses. In the areas with steep slopingtopography and high human population, agricultural practices such as seasonal upland crops productionbecomes one of the issues in land damaging in Indonesia. This study aims were to determine the relationshipbetween the land slope and the texture, organic matter, permeability and erodibility of soils at differentslope positions in a land use so that can be used as a source of information and guidance to the communityor the population around the village as well as the institutions involved in land management. The study useda free survey method based on toposekuen. The study techniques used comparative and descriptive methodsto compare samples that collected in the conducted survey then performed explanation and description ofthe conditions in the field that qualitatively observed. The results showed that there was no significantrelationship between the slope and the texture, organic matter, permeability and erodibility of soils invarious slope positions. The 26-40% slopes in the middle and upper slope positions had the highesterodibility value compared to other slope and slope position.Keywords: Slope, slope position, land use, erodibility, organic matterABSTRAKIndonesia memiliki banyak lahan yang sangat potensial khususnya di bidang pertanian. Pada daerah-daerahyang memiliki topografi berlereng curam dan berpenduduk padat, usaha pertanian seperti tanaman semusimtegalan merupakan salah satu sumber kerusakan tanah di Indonesia. Penelitian ini bertujuan untukmengetahui hubungan antara kemiringan lereng dengan tekstur, bahan organik, permeabilitas danerodibilitas tanah pada berbagai posisi lereng di suatu penggunaan lahan sehingga dapat dijadikan sebagaisumber informasi dan arahan bagi masyarakat atau penduduk di sekitar desa serta instansi yang terkaitdalam pengolahan lahannya. Penelitian ini menggunakan metode survei bebas berdasarkan toposekuen.Teknik penelitian menggunakan metode komparatif dan deskriptif yaitu membandingkan sampel-sampelyang diambil berdasarkan metode survei yang dilakukan, kemudian menjelaskan dan menggambarkankondisi di lapangan yang diamati secara kualitatif. Hasil penelitian menunjukkan bahwa tidak terdapathubungan yang kuat antara kemiringan lereng terhadap tekstur tanah pada berbagai posisi lereng,kemiringan lereng terhadap bahan organik tanah pada berbagai posisi lereng, kemiringan lereng terhadappermeabilitas tanah pada berbagai posisi lereng serta antara kemiringan lereng terhadap erodibilitas tanahpada berbagai posisi lereng. Kemiringan lereng 26-40% pada posisi lereng tengah dan atas mempunyai nilaierodibilitas yang tertinggi dibandingkan dengan kemiringan dan posisi lereng lainnya.Kata Kunci: Kemiringan, posisi lereng, penggunaan lahan, erodibilitas, bahan organik

scholarly journals Komunitas Makrozoobentos di Sungai Gua Pintu Ngalau pada Kawasan Karst di Sumatera Barat

2018 ◽  
Vol 5 (1) ◽  
pp. 41
Author(s):  
Husnul Mar’i ◽  
Izmiarti Izmiarti ◽  
Nofrita Nofrita
Keyword(s):  
Organic Matter ◽  
Light Intensity ◽  
Organic Material ◽  
Random Sampling ◽  
Diversity Index ◽  
Survey Method ◽  
Stratified Random Sampling ◽  
Total Density ◽  
Irrigated Rice ◽  
Dark Zone

Pintu Ngalau cave is flowed by river from irrigated rice fields that flows into the cave. This cave has a source of organic matter derived from bats and swallow dirts, litter that falls on enterance of the cave and the organic material carried by the flow of the river. The study on the macrozoobenthos communities of river in Pintu Ngalau Cave has been conducted from October until November 2016. The study used survey method, where stratified random sampling was applied in three zones (light zone, dim zone and dark zone) at study site. Macrozoobenthos samples was collected by surber net. This study also measured the physic-chemical of water. The results showed the composition of macrozoobenthos in the Pintu Ngalau cave river consisted of 43 genera i.e Gastropods (2 genera), Hirudinea (2 genera), Insects (36 genera) and Oligochaetas (3 genera). Total density of macrozoobenthos in this site was 2100 ind/m2 and the highest density was found in dark zone. The highest total relative density (KR total=79,89%) on genus level at every zone was Hydropsyche. Diversity index of macrozoobenthos was classified as medium (H'=2.68) with evenness distribution was evenly (E=0.61) and no dominant genus (C=0.14). The existence of macrozoobenthos was not influenced by light intensity, but instead was more influence by the condition of the substrate and the flow of water in the cave.

The Impact of corporate social responsibility (CSR) and relationship marketing on relationship maintainer and customer loyalty by mediating role of customer satisfaction

2018 ◽  
Vol 4 (4) ◽  
pp. 19-24
Author(s):  
Anam Bhatti ◽  
Sumbal Arif ◽  
Marium Marium ◽  
Sohail Younas
Keyword(s):  
Customer Satisfaction ◽  
Relationship Marketing ◽  
Customer Loyalty ◽  
Sampling Technique ◽  
Research Strategy ◽  
Equation Modeling ◽  
Survey Method ◽  
Research Approach ◽  
Questionnaire Method ◽  
The Impact

CSR has become one of the imperative implements in satisfying customers. The impartial of this research is to calculate CSR, relationship marketing, and customer satisfaction. There is no more study accompanied in Pakistan to quantify the effect of CSR and relationship marketing on the relationship maintainer and customer loyalty. To find out deductive approach and survey method is used as research approach and research strategy respectively. This research design is descriptive and quantitative study. For data, collection questionnaire method with semantic differential scale and seven point scales are adopted. Data has been collected by adopting the non-probability convenience technique as sampling technique and the sample size is 400. For factor confirmatory factor analysis, structure equation modeling and medication analysis, regression analysis Amos software were used. Strong empirical evidence supports that the customer’s perception of CSR performance is highly influenced by the values

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