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Teknologi Mitigasi Gas Rumah Kaca Di Lahan Rawa Pasang Surut Annisa, Wahida; Rachman, Achmad
Jurnal Lahan Suboptimal Vol 5, No 2 (2016): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Annisa, et al. Technologies for Mitigating Greenhouse Gas Emissions on Tidal Swamp Land. JLSO 5(2):178-188.Utilization of swamps for agricultural development is a strategic choice in an effort to offset the decrease in productive land in Java due to conversion of land functions from agriculture to non-agriculture. The properties of land in swamplands is a major limiting factor that causes low productivity of swamp land. The development of agriculture in swamplands often has a negative impact on land and environment, due to inappropriate landl management. One of the environmental impacts in swampland development is carbon emissions. Carbon emissions can be reduced through the use of appropriate soil ameliorant and water management within the swamp hydrological area. Both approaches are important not only to mitigate greenhouse gas emissions but also to increase swampland agriculture productivity.
Indikator Kualitas Tanah pada Lahan Bekas Penambangan Rachman, Achmad; sutono, Sutono; Irawan, Irawan; Suastika, I Wayan
Jurnal Sumberdaya Lahan Vol 11, No 1 (2017)
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Abstrak. Lahan dalam kawasan tambang-tambang mineral mengalami perubahan sifat fisik, kimia, dan biologi tanah serta lansekap yang sangat signifikan sebagai akibat dari berbagai aktifitas penambangan seperti land clearing, pembangunan fasilitas pendukung kegiatan penambangan, lalu lintas kendaraan berat, penggalian, penimbunan bahan galian, pengolahan hasil tambang atau bahan mineral, dan lainnya. Sangat penting untuk mengembalikan kualitas tanah seperti kondisi sebelum kegiatan penambangan sehingga lahan dapat difungsikan kembali untuk pertanian. Makalah ini membahas metode penilaian indeks kualitas tanah sehingga dapat dievaluasi dampak berbagai perlakuan reklamasi. Sejumlah hasil penelitian menunjukkan bahwa penggunaan indeks kualitas tanah untuk tujuan tersebut memberikan hasil yang baik, mudah dilaksanakan dan mudah dipahami oleh pengguna. Pemilihan indikator kunci (minimun data set) dan nilai ambang batasnya, pada batas mana tanah dapat berfungsi optimal, sangat menentukan akurasi penetapan indeks kualitas tanah. Penskoran dan pembobotan dilakukan terhadap setiap individu indikator kunci yang kemudian diintegrasikan untuk mendapatkan satu nilai indeks kualitas tanah. Indikator kunci untuk mengevaluasi kualitas tanah pada lahan bekas tambang disarankan sebagai berikut: kandungan bahan organik tanah (SOM), reaksi tanah (pH), berat isi tanah (BD), kapasitas air tersedia (AWC), agregasi (WSA), dan respirasi tanah, namun dapat ditambahkan indikator lain sesuai tujuan evaluasi dan kondisi geografis lahan yang akan dievaluasi. Penilaian kualitas tanah dapat juga dilakukan menggunakan metode Scorecard. Evaluasi kualitas tanah pasca penambangan sebaiknya dilakukan sebelum pelaksanaan reklamasi untuk menentukan prioritas sifat-sifat tanah yang perlu perhatian lebih sehingga perlakuan reklamasi lebih terarah dan terukur dan selama pelaksanaan reklamasi untuk mengetahui arah perubahan yang terjadi.Abstract. Land in the mining areas undergo changes in soil physical, chemical, and biological properties as well as landscape as a result of various mining activities namely land clearing, construction of facilities to support the operations, movement of vehicles, excavation, storage of overburden dump materials backfilling of excavated material, and mineral mined processing. It is essential to restore soil quality similar to the condition before mining operation so that it can be utilized for agriculture purposes. This paper discusses method for assessing soil quality index to allow evaluation of the impact of different reclamation treatments. Studies indicated that the use of soil quality index gave good result, easy to perform, and easy to understand by the end user. Selection of key indicators (minimum data set) and its threshold values, in which soil is functioning optimally, is essential for the accuracy of soil quality index determination. Scoring and weighing of the individual soil indicator was performed before integrating all key indicators to obtain a soil quality index. Key indicators for evaluating soil quality of reclaimed mine soils is recommended to include soil organic matter (SOM), soil reaction (pH), bulk density (BD), available water capacity (AWC), water stable aggregate (WSA), and soil respiration, however, other indicators could be added depending upon the goal of assessment and geographical condition of land that is subject to evaluation. Qualitative assessment of soil quality can also be conducted using scorecard method. Evaluation of post-mining soil quality should be conducted before any reclamation activities to priorities soil properties that need more attention, so that reclamation treatments will be more focus and measurable and on on-going reclamation to monitor the trend of change.
Affects of Tsunami on Soil Properties in NAD and Its Rehabilitation Strategy RACHMAN, ACHMAD; ERFANDI, DEDDY; ERFANDI, DEDDY; ALI, M. NASIL; ALI, M. NASIL
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 28 (2008): Desember 2008
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

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Abstract

The giant tsunami waves following the earthquake of the west coast of Sumatra on December 26, 2004, have caused soil salinisation of agricultural lands and damaged to irrigation and drainage channels along the coastal areas of Aceh Province, Indonesia. The objective of this study was to monitor the changes in soil salinity of the tsunami-affected sites. Regular collection of soil samples for soil laboratory analyses and field salinity measurement using an electromagnetic induction technique(EM38) have been conducted. The level of soil salinity in tsunami affected areas appears to be related to the characteristics of the deposited mud and soil permeability. Salt appears to have penetrated deeper into the sandier soils, commonly used to grow peanut during dry seasons. In the heavier rice soil, salt accumulate closer to the soil surface, probably because they were flooded at the time of the tsunami and often have a dense impermeable plough layer. Recommendations have been made to farmers that would allow them to reduce crop losses on tsunami affected soils. This includes avoid planting land that is still saline, enhance salt leaching horizontaly and vertically, improve soil fertility, and grow salt tolerant crops.
Peluang dan Tantangan Implementasi Model Pertanian Konservasi di Lahan Kering Rachman, Achmad
Jurnal Sumberdaya Lahan Vol 11, No 2 (2017)
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Abstrak. Pertanian konservasi adalah salah satu alternatif model pada praktek pertanian di lahan kering yang dalam jangka panjang dapat meningkatkan produktivitas tanaman, efisiensi usahatani, dan kualitas lingkungan melalui perbaikan kualitas tanah. Tulisan ini membahas prospek penerapan pertanian konservasi untuk meningkatkan kualitas tanah dan produktivitas lahan kering. Model pertanian konservasi lebih menekankan pada perbaikan kandungan bahan organik tanah melalui kombinasi 3 pendekatan yaitu olah tanah minimum, pemulsaan, dan pengaturan pola tanam. Introduksi model pertanian konservasi di negara-negara berkembang seperti Indonesia, yang umumnya lahan pertaniannya berskala sempit (<1 ha) dihadapkan pada masalah perkembangan gulma dan penurunan produktivitas pada fase awal implementasi, dan lahan yang tidak bersih sehingga berpotensi memicu munculnya hama dan penyakit tertentu. Namun demikian, model pertanian konservasi ini berpotensi untuk mengubah lahan kering terdegradasi atau tidak produktif menjadi lahan pertanian produktif dengan efisiensi usahatani yang tinggi. Dengan manfaat jangka panjang tersebut, maka implementasi pertanian konservasi di lahan kering, yang potensinya mencapai 29,4 juta ha, akan meningkatkan secara signifikan kontribusi lahan kering terhadap upaya mempertahankan swasembada pangan nasional dan meningkatkan kesejahteraan petani lahan kering. Diperlukan proses dan modifikasi untuk mengadaptasikan teknologi ini yang disesuaikan dengan karakteristik agroekosistem, konidisi sosial, dan ekonomi lokal setempat, sehingga berbagai kendala adopsi dapat diminimalisir dan manfaat dapat dioptimalkan baik jangka pendek maupun jangka panjang. Selain itu, diperlukan dukungan pemerintah dalam bentuk pelatihan, advokasi, dan bantuan input usahatani untuk meminimalisir resiko kerugian petani terutama pada tahap awal implementasi teknologi.Abstract. Conservation agriculture is an alternative model to agricultural practices in dryland which in the long term provides a number of benefits including an increase in crop productivity, farm input efficiency and environmental quality through the improvement of soil quality. This paper discusses the prospect for implementing conservation agricultural to improve soil quality and productivity of dryland. The conservation agriculture model emphasizes the improvement of soil organic matter content through a combination of 3 approaches, namely minimum tillage, mulching, and cropping pattern. Introduction of conservation agriculture into developing countries like Indonesia, which are generally small-scale farming (<1 ha), will face a number of obstacles caused by short-term and immediate shortcomings of the technology. These shortcomings include weed development and productivity decline in the early phase of implementation, and the potential to trigger the emergence of certain pests and diseases due to unclean land. However, the practice has the potential to transform degraded or unproductive drylands into more efficient and productive agricultural land. With those long-term benefits of conservation agriculture, its implementation to 29.4 million ha of dryland of Indonesia will boost significantly the contribution of dryland agriculture in sustaining national food self sufficiency and improving the welfare of dryland farmers. Processes and modifications are needed to adapt this practice to suit local agroecosystem, social and local economic characteristics so that various adoption constraints can be minimized and short-term and long-term benefits can be optimized. In addition, government supports are needed in the form of training, advocacy and farm inputs subsidies to minimize the risk of loss of farmers especially in the early stages of technology implementation.