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Atang Sutandi
Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga Bogor 16680
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Discriminating Land Characteristics of Yield and Total Sugar Content Classes of Cilembu Sweet Potato (Ipomoea batatas L.) Muhammad Amir Solihin; Santun R. P. Sitorus; Atang Sutandi; Widiatmaka Widiatmaka
AGRIVITA, Journal of Agricultural Science Vol 40, No 1 (2018): FEBRUARY
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v40i1.1148

Abstract

Cilembu sweet potato is a unique commodity with high demand market due to its sweet taste. The objectives of this study were to investigate the production performance of Cilembu sweet potatoes in term of production classes and critical limit and to determine discriminating land characteristics classes of yield and total sugar content. This study was conducted in Cilembu sweet potatoes production centers in West Java. Sweet potatoes tuber and soil samples were collected by purposive random sampling during harvest. Cilembu sweet potatoes production classes were defined by decreasing yields criteria in land evaluation. Critical limit production was the lowest yield and total sugar content of raw tuber which harvested in Cilembu village. Discriminating land characteristics were decided by discriminant analysis. Results showed that there was a significant different yield between typical and nontypical areas. Critical limit of yield and total sugar content were 10.5 t ha-1 and 2.32 %, respectively. The discriminating land characteristics of yield classes were soil properties (pH, CEC, P, Ca, Mg, ΔT), and monthly rainfall, whereas for total sugar content classes were effective soil depth, clay, sand and monthly rainfall. These variables are proposed as diagnostic criteria in Cilembu sweet potato land suitability criteria.
KARAKTERISTIK LAHAN DAN KUALITAS KEMANISAN UBI JALAR CILEMBU Muhammad Amir Solihin; Santun Risma Pandepotan Sitorus; Atang Sutandi; Widiatmaka Widiatmaka
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 7 No. 3 (2017): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.7.3.251-259

Abstract

The Cilembu sweet potato is the popular food crop from specific location in Sumedang, West Java. Sweetness degree is one of key indicators for this commodity. Sweetness degree relate to sugar content. Currently, Cilembu sweet potato variety was grown by farmers is Rancing. They were local culture on cultivation and storage of Cilembu sweet potato. Study of Cilembu sweet potato based on land characteristics on cultivation location and sweetness quality along storage periods between different cultivation locations is limited. The objectives of this study were to determined influence of land characteristics of cultivation locations and storage periods on sweetness quality of Cilembu sweet potato. Samples were taken from harvested tubers from Cilembu, Rancakalong, Sukasari, Cicalengka, and Jalaksana cultivation location using purposive sampling method. Sweetness degree was measured by total sugar content using luff schoorl method. The experiment design was used split plot design. The experiment room controlled at the same condition. The storage periods was observed at 0, 1, 2, 3, and 4 weeks after harvest. The role of land characteristics on the sweetness quality of Cilembu sweet potato was used analysis of regression and t test for equality of means. The result showed that storage periods was significantly affect the sweetness quality of Cilembu sweet potato, while the cultivation locations did not significant influence on sweetness quality. They were not interaction between both factors. The chemical and physical soil properties, elevation and climate properties affect differences of sweetness quality of Cilembu sweet potato on different cultivation locations.
POTENSIAL REDOKS TANAH SEBAGAI PENDUGA RESPIRASI HETEROTROF DARI LAHAN GAMBUT PERKEBUNAN KELAPA SAWIT DI RIAU Bargowo Addianto; Bandung Sahari; Atang Sutandi; Untung Sudadi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 10 No 2 (2020): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.10.2.163-172

Abstract

Respirasi tanah terdiri atas respirasi autotrof dan heterotrof. Pada lahan gambut, respirasi heterotrof setara dengan laju dekomposisi bahan gambut. Penelitian ini bertujuan mengembangkan model potensial redoks (Eh) tanah sebagai penduga respirasi heterotrof dari perkebunan kelapa sawit pada lahan gambut tropika. Respirasi tanah diukur menggunakan metode sungkup tertutup pada plot close-to-tree (berjarak 2 m dari pohon) dan far-from-tree (4.5 m dari pohon), sedangkan untuk respirasi heterotrof pada plot root-cut (4.5m dari pohon) yang disiapkan dengan pemotongan akar hingga kedalaman 80 cm dan diinkubasi selama 8 bulan. Respirasi tanah pada lokasi penelitian 40.81 ton CO2 ha-1.th-1, 50.53% darinya berasal dari respirasi komponen heterotrof (RKH). Respirasi heterotrof berkorelasi positif dengan Eh tanah pada pH 7 di kedalaman -30 dan -90 cm (Eh7~30 and Eh7~90) dan berkorelasi negatif dengan tinggi muka air tanah. Nilai koefisien korelasi linier sederhana yang signifikan, r= 0.84 dan 0.87; n= 12, dengan RKH masing-masing ditunjukkan oleh Eh7~30 and Eh7~90. Oleh sebab itu, kedua faktor tersebut dapat disarankan sebagai penduga RKH dengan persamaan: RKH (ton CO2 ha-1.th-1) = 18.2 + 0.029 Eh7~30 + 0.037 Eh7~90 (Eh dalam mV).
PENETAPAN BAHAN DIAGNOSIS STATUS HARA NPK PADA JARINGAN TANAMAN PEGAGAN Hermanto Hermanto; Munif Ghulamahdi; Latifah K. Darusman; Nurliani Bermawie; Atang Sutandi
Buletin Penelitian Tanaman Rempah dan Obat Vol 22, No 2 (2011): BULETIN PENELITIAN TANAMAN REMPAH DAN OBAT
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bullittro.v22n2.2011.%p

Abstract

Studi fisiologi dan agronomi seperti aplikasi teknik pemupukan yang efisien dan rasio-nal diperlukan guna menghasilkan produk-si simplisia dengan kandungan bahan aktif tinggi. Penentuan jaringan daun yang te-pat sebagai bahan diagnostik status hara N, P, dan K guna menetapkan kebutuhan pupuk yang efisien bagi tanaman sangat diperlukan. Untuk itu telah dilakukan pene-litian yang menggunakan model korelasi li-nier sederhana yang dilanjutkan dengan uji korelasi. Penelitian ini dilakukan pada tanaman pegagan (Centella asiatica) akse-si Boyolali di KP. Gunung Putri, Cipanas, Balai Penelitian Tanaman Obat dan Aroma-tik (Balittro) sejak Mei sampai Nopember 2008 dengan jenis tanah Andosol yang berada pada ketinggian tempat 1.500 m dpl. Hasil uji korelasi jaringan daun yang paling tepat sebagai bahan diagnosis sta-tus hara bagi produk simplisia dan asiati-kosida pada tanaman pegagan umur 5 bulan setelah tanam (BST) adalah posisi daun ke-3 untuk analisis hara N, P, dan K. Kandungan asiatikosida pada daun tua (1,92% pada umur 6 BST) lebih tinggi dari pada daun muda (1,05% pada umur 3 BST).
Pengaruh Komponen Neraca Air Terhadap Produktivitas Kelapa Sawit pada Berbagai Jenis Tanah:: Studi Kasus Kalimantan Tengah dan Barat Adhy Ardiyanto; Kukuh Murtilaksono; Enni Dwi Wahjunie; Atang Sutandi
Jurnal Penelitian Kelapa Sawit Vol 29 No 1 (2021): Jurnal Peneltian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v29i1.125

Abstract

Different types of soil and the geographical areas of oil palm plantations generate variations in soil physical properties (e.g. texture and porosity). Differences in geographical location further result in variations in the amount of rainfall that affects the water balance. The response to diverse fluctuations in palm oil production due to variations in soil types and water balance can be assessed through correlation analysis between water balance parameters and oil palm productivity under varying soil types and regions. In this study, the water balance analysis was carried out at three locations of PT Bumitama Gunajaya Agro's oil palm plantations in Central Kalimantan and West Kalimantan provinces, using the Thornthwaite-Mather method. Analysis of the relationship between water balance components and oil palm fresh fruit bunch (FFB) yields is calculated based on monthly data for 8 years (2012 - 2019) using time series analysis and stepwise regression to find the best regression model. The water balance components that most influence the fresh fruit bunches (FFB) yield (tonnes/ha/month) are rainfall 7 months before harvest, rainy days 11 and 28 months before harvest, and water deficit 10 months before harvest. A decrease in FFB yield (tonnes/ha/month) occurs every time there is an increase in water deficit of 10 mm/month on Dystrudept, Paleudults, and Haplohumods soils in Area 3, respectively 11, 2, and 3%. In Area 5 the decline is 12, 4, and 5%. In Area 6 the decline is 5, 18, and 3%.
EVALUASI KEBERLANJUTAN PENGELOLAAN PERKEBUNAN KELAPA SAWIT POLA INTI-PLASMA DI PT.PERKEBUNAN NUSANTARA VII MUARA ENIM, SUMATERA SELATAN (Evaluation and Status of Sustainable Palm Oil Management in PT.Perkebunan Nusantara VII Muara Enim, South Sumatera) Ruslan -; Supiandi Sabiham; Sumardjo -; Manuwoto -
EKOLOGIA Vol 13, No 1 (2013): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.614 KB) | DOI: 10.33751/ekol.v13i1.12

Abstract

There were three pilars of palm oil plantation in Indonesia, state-owned large estates and private estates which total extensive oil palm plantations area in 2005 were 5.445 thausands hectares with 12.452 thausands million tons production crude palm oil. The composition of the plantation farmers area was 40,02 %, national large plantations was about 13,96 %, and 48,68 % for private estates.There are two types of Management of their field, nucleous estate smallholders (NES) and farmers. Unfortunately farmers better than independent farmers in managing the estates, because there was cooparation between the farmers with the nucleous companies. The PIR system stated that the nucleous plantation companies were useful in developing and crops farmers market assigning, While the farmers must manage his estates well and market the results through the company's nucleous. Sustainability analysis conducted by the method of Multi Dimensional Scaling (MDS) approach with Rap-Insus palm oil techniques (Rapid Appraisal-Index Sustainability of palm oil Management). Analysis of key factors of sustainability management performed a prospective analysis of the sensitivity factors (leverage factor) of the MDS and the factors from the analysis of stakeholders' needs. The results showed that the status of sustainability of palm oil management in PT.Perkebunan Nusantara VII Muara Enim, South Sumatera)was quite sustainable with a multidimensional index of 67,67.
Pengelolaan Lahan Gambut Untuk Pengembangan Kelapa Sawit Di Indonesia Supiandi Sabiham; Sukarman Sukarman
Jurnal Sumberdaya Lahan Vol 6, No 2 (2012)
Publisher : Indonesian Center for Agriculture Land Resource Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jsdl.v6n2.2012.%p

Abstract

Abstrak.Lahan gambut yang mempunyai sifat mudah rusak, pemanfaatannya harus berpedoman pada upaya pengembangan lahan berkelanjutan dengan konsep pembangunan yang “konstruktif-adaptif”. Pengalihan fungsi lahan gambut untuk keperluan lain berdasarkan kesesuaian dan kemampuan lahan serta penggunaan teknologi yang sesuai harus menjadi dasar dalam pengembangan lahan gambut ke depan. Dengan demikian, pemilihan teknologi dan komoditas yang tepat dan adanya upaya untuk menekan kerusakan lahan hingga sekecil mungkin menjadi sangat penting. Kelapa sawit merupakan salah satu komoditas yang mampu beradaptasi dengan baik pada berbagai jenis lahan, termasuk lahan gambut. Dengan teknologi pengelolaan air yang tepat, disertai peningkatan stabilitas bahan gambut dan serapan CO2 oleh tanaman pada kawasan pengembangan kelapa sawit, maka pemanfaatan lahan gambut akan memberikan faedah yang besar, tidak hanya untuk masa kini tetapi juga untuk masa mendatangAbstract.Peatlands with fragile properties should be used by following the guidance of sustainable land development with land usages concept of “constructive-adaptive” development. Conversion of peatlands for other land usages based on land capability and land suitability as well as the appropriate use of technology should be the basis for their future development. Thus, the selection of suitable technologies and commodities with the attempts to reduce the land damage to the lowest level is very important. Oil palm is one of the agricultural commodities that are able to adapt different types of land, including peatlands. With proper water management and the efforts to increase peat stability and CO2 sequestration in the area of oil palm development, the use of peatlands will provide a great benefit, not only for today but also for the future.
Sustainability Analysis of Existing Agriculture on High Risk Erosion Area (Case Studies in Lembang, West Bandung District and in Dongko, Trenggalek District) RACHMI WIDIRIANI; SUPIANDI SABIHAM; S. HADI SUTJAHJO; IRSAL LAS
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 29 (2009): Juli 2009
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n29.2009.%p

Abstract

There are three main constraints for the upland agriculture development, namely (1) steep slopes that limit the suitable farm land, (2) soil erosion rate tends to be higher than the rate of soil losses and (3) high average annual rainfall. This research focused on sustainability analysis at high risk erosion area in Lembang sub district and Dongko sub district. The aim of this research was to analyze index and sustainability status of the border area, existing farming on high risk erosion. Multi Dimension Scalling-Rapid appraisal for farming (MDS-Rapfarm) technique was used for evaluating the sustainability of existing farming based on five sustainable indicators i.e. ecology, economy, social, local organization, and technology. Soil analysis and USLE method were used to predict erosion rate and soil fertility. The result of the MDS analysis showed that sustainable multi-dimension index (ecology, economy, social, local organization, technology) of Lembang sub district was 35,47; 38,15; 56,42; 34,49; 17,30;and Dongko sub district was 24,16; 47,13; 63,78; 64,78; 41,55 (on scale 0-100). The average of soil loss in Lembang was predicted 147,29 t ha-1 year-1 and in Dongko was 245,95 t ha-1 year-1 on average. Attributes being sensitive in increasing index and sustainability status were: source of organic matter, perennial proportion, farmer oriented on agriculture extension, social conflict intensity, annual rainfall, land solum, land conversion, and number of agriculture household.
Sustainability Index of Rice Field for Supporting Spatial Planning (Case Study in Jember District, East Java) . NURWADJEDI; BUDI MULYANTO; SUPIANDI SABIHAM; ARIS PONIMAN; . SUWARDI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 32 (2010): Desember 2010
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n32.2010.%p

Abstract

Rice Field agriculture in Jember district is a main sector due to its contribution to rice production in this region. The objective of this study is to determine the rice field sustainability index based on agro-ecosystem zone and to formulate policy alternatives for supporting the spatial planning in achieving sustainable rice field agriculture. The study used the primary andsecondary data which include biophysical environment, economy, social and culture. The data analysis used GIS (Geographic Information System) modelbase, factor analysis, and AHP (Analytical Hierarchy Process). The results showed that the sustainability index of the rice field agro-ecosystem zones were different. The threats of the rice field sustainability were causedby the main indicators of the biophysical environment, economy, social, and culture such as water availability, soil nutrients of Carbon organic content, Nitrogen, and Phosphor-available, profit, fertilizer access, land conversion, land ownership and fragmentation, farmer education, and age of farmer. To overcome those threats, the policy consideration was more dominantly determined by the biophysical factor rather than that of theeconomy, social, and culture. The implementation of the policy tohandle the threats needs to be coordinated among the stakeholders, considering that the rice field resource can be categorized into a common pool resource.
Pengaruh Kerapatan Akar, Pupuk, dan Kedalaman Muka Air Tanah terhadap Emisi CO2 dari Tanah Gambut pada Perkebunan Kelapa Sawit Setiari Marwanto; Supiandi Sabiham; Untung Sudadi; Fahmuddin Agus
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 37, No 1 (2013)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v37n1.2013.9-18

Abstract

Co-Authors , Suprihati -, Bachtiar -, Manuwoto . ACHMADI . NURWADJEDI . Suwarno A.A. Ketut Agung Cahyawan W Abdul Hasyim Sodiq Abdul Rachim Abdurrani Muin Adhy Ardiyanto Agung Lukman Agus Sofyan Alce Ilona Noyaa Anas D Susila Anas D Susila Anas D. Susila Anas Dinurrohman Susila Andrea Emma Pravitasari, Andrea Emma Anggi Nico Flatian, SP Aris Poniman Baba Barus Bachtiar Bachtiar Bambang Paramudya Bambang Pramudya Bambang S Purwoko BANDUNG SAHARI Bandung Sahari Bandung Sahari Bargowo Addianto Bariot Hafif Bariot Hafif Bariot Hafifa Basuki Sumawinata Bayu Sejati Boedi Tjahjono Budi Mulyanto Budi Nugroho Budi Nugroho Darmono Taniwiryono Darmono Taniwiryono Dedi Nursyamsi Dedi Nursyamsi Desi Nadalia Didy Sopandie Djoko Purnomo DWI ANDREAS SANTOSA Dwi Guntoro Edi Santosa Edwin Hidayat, Edwin Edy Djauhari Purwakusumah Eko Noviandi Ginting Endang Gunawan Endang Suhendang Enni Dwi Wahjunie Fahmi Arief Rahman Fahmuddin Agus Fakhrur Razie Fakhrur Razie Ganjar Priadi Gunawan Djajakirana Hadijah Siregar Handayani, Etik Puji Happy Widiastuti Happy Widiastuti Harianti, Mimien Hartono, Arif Hendri Purnama Herison, Catur Hermanto Hermanto Heru B. Pulunggono Heru Bagus Pulunggono Husni Mubarok Husni Mubarok Husni Mubarok Husni Mubarok I Nyoman Sujana I Wayan Mangku I Wayan Rusastra Ibnul Qoyim, Ibnul Idris, Kamarudin Idris, Komaruddin Ilona Noyaa, Alce Indarti Puji Lestari Indriyati, Lilik Tri Irawati, Arfi Irdika Mansur Irsal Las Irsal Las Ishak Ishak Ishak Ishak Ishak Ishak Iswandi Anas Iswandi Anas Iswandi Anas Iswandi Anas Iswandi Anas Iswandi anas Ivanocih Agusta Ivanovich Agusta J. Sri Adiningsih K Kasmadi Kasmadi Kasmadi Kasmadi Kasmadi Khursatul Munibah Komarsa Gandasasmita Komarsa Gandasasmita Komaruddin Idris Komarudin Idris KOMARUDIN IDRIS Kukuh Murtilaksono Kusuma Handayani L. K. Darusman Latifah K. Darusman Latifah Kosim Darusman LATIFAH KOSIM DARUSMAN Lina Lathifah Nurazizah Lina Lathifah Nurazizah Luh Putu Ratna Sundari Lukman Gunarto Luthfi Izhar M. ALWI Machfud Machfud Manuwoto - MARIA BINTANG Maryadi Maryadi Maryadi Maryadi Maswar Maswar Maswar Maswar Maya Melati Meine Van Noordwijk Meine van Noordwijk Meine Van Noordwijk Miftahudin . Moh Zulfajrin Moh Zulfajrin Moh Zulfajrin Moh Zulfajrin Mohamad Rafi Muchammad Sri Saeni Muhadiono Muhadiono, Muhadiono Muhammad Amir Solihin Muhammad Amir Solihin Muhammad Ardiansyah muhammad Firdaus Muhammad Thamrin Muhammad Zulfikar Muliana Mulyawan, Ronny Munif Ghulamahdi Muya Avicienna Nabila Hanifah Natalia, Rina Nelvia Nelvia nFN Thamrin NISA RACHMANIA MUBARIK Nizam Tambusai Nizam Tambusai Novia Mustikasari Nurliani Bermawie Ohiwal, Morgan Oteng Haridjaja Paulus B.K. Santoso Priyo Cahyono Priyo Cahyono, Priyo R. Purnamayani Rachim, Djunaedi Abdul RACHMI WIDIRIANI RAHAYU WIDYASTUTI Rasti Saraswati Retno Wijayanti Rika Andriati Sukma Dewi Rina Natalia Rury Kurniawan Ruslan - Rykson Situmorang S Susanto S. Anwar S. HADI SUTJAHJO Saeful Anwar Saeni, Muchammad Sri Safira Sukma Hanjani Sandra Arifin Aziz Santun R. P. Sitorus Santun R.P Sitorus Santun R.P. Sitorus Santun Risma Pandapotan Sitorus Santun Risma Pandepotan Sitorus Septiyana, . SETIARI MARWANTO Siska Nofita Siswanto Siswanto Siswanto Sisworo, Widjang Herry Siti Maryam Harahap Siti Maryam Harahap Siti Nurzakiah Siti Nurzakiah Siti Nurzakiah Sri Djuniwati Sri Djuniwati Sri Juniwati Sri Nico Djuniwati Sri Widodo Agung Suedy Sri Wilarso Budi Sudarsono Sudarsono . Sugiyanta Sukarman Sukarman Sumardjo Supiandi Sabiham Suria Darma Tarigan Surjono H. Sutjahjo Susanto, Bambang Sutjahjo, Surjono H. Suwondo Suwondo Suyamto Suyamto Suyamto Suyamto Suyamto Suyamto Syaiful Anwar Syaiful Anwar Syamsul Arifin Syva Fitriana Taopik Ridwan TATI NURHAYATI Taufiq Bachtiar Taufiq Bachtiar Thamrin, nFN Toyip Toyip Untung Sudadi W. Hartatik Widiatmaka Yadi Setiadi Yahya, Vanda Julita