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Ni Nyoman Sulastri
Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Pemetaan Risiko Longsor Berbasis Slope, Aspect, dan Curvature pada Agroindustri Tahu (Studi Kasus di Desa Sambak, Magelang) Anak Agung Caresasha Adinda Dea; Ni Nyoman Sulastri; Ngadisih Ngadisih; Ida Bagus Ary Purnayama Parbawa; Komang Ratih Indah Pradnyani
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 14 No 2 (2026): INPRESS
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Tanah longsor merupakan salah satu bencana geologi yang berpotensi menimbulkan dampak signifikan terhadap keberlanjutan kegiatan sosial dan ekonomi masyarakat, khususnya pada wilayah perbukitan. Desa Sambak, Kecamatan Kajoran, Kabupaten Magelang, merupakan kawasan dengan kondisi topografi curam yang berkembang sebagai sentra agroindustri tahu, sehingga memiliki tingkat risiko longsor yang perlu dikaji secara sistematis. Penelitian ini bertujuan untuk menganalisis dan memetakan risiko longsor sebagai dasar perencanaan mitigasi yang berkelanjutan bagi keberlangsungan agroindustri tahu di wilayah tersebut. Analisis dilakukan menggunakan data digital surface model (DSM) resolusi 0,45 m yang diolah untuk menghasilkan parameter kemiringan lereng (slope), arah hadap lereng (aspect), dan kelengkungan lereng (curvature). Metode frequency ratio (FR) digunakan untuk menentukan tingkat kerawanan dan bahaya longsor berdasarkan hubungan antara parameter topografi dan kejadian longsor, sedangkan variabel kerentanan (vulnerability) dan kapasitas (capacity) dianalisis menggunakan interpolasi inverse distance weighted (IDW). Seluruh pengolahan data spasial dilakukan dengan perangkat lunak QGIS 3.18. Hasil analisis menunjukkan bahwa wilayah penelitian terbagi ke dalam tiga kelas risiko longsor, yaitu risiko rendah, sedang, dan tinggi. Sebagian besar lokasi agroindustri tahu berada pada kelas risiko sedang, sementara dua lokasi teridentifikasi berada pada kelas risiko tinggi. Kondisi ini mengindikasikan perlunya upaya mitigasi yang terarah guna menjaga keberlanjutan usaha agroindustri serta mengurangi potensi kerugian akibat bencana longsor.
ANALISIS KEBUTUHAN AIR TANAMAN STRAWBERRY YANG DIBUDIDAYAKAN SECARA HIDROPONIK DI DALAM GREENHOUSE I Made Purnadiyasa; I Wayan Tika; Ni Nyoman Sulastri
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 1 No 2 (2013): Agustus
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/j.beta.2013.v01.i02.p02

Abstract

The purpose of this study was to determine the pattern of water requirements for strawberry plant using hydroponic which was planted in the greenhouse, from transplanting to harvesting time. The materials used in this study were the strawberry seedlings, rice husk, NPK fertilizer and plastic polybag. The tools used were 4-way soil analyzer to measure soil pH, soil moisture, light intensity for soil, analytical balance, plastic tank that were used to store water, ruler and thermometer. Parameters observed were initial moisture content, the period of irrigation water supply, amount of water used by plants and irrigation water requirement. Based on the study which was conducted during the (i)high level is (57,66 ml/day), (ii)medium is (42,40 ml/day) and (iii)low is (30,06 ml/day) of soil moisture, it showed that crop water requirement depended on existing soil moisture. In addition, there was a trend that crop water requirement would increase as the increase of soil moisture. During low level of soil moisture (under the field capacity), the plant would experience difficulties in extracting water from soil. Conversely, during high level of soil moisture, water would easily be taken and plant water requirement would increase because of the increase of soil evaporation, especially during the initial stage of plant growth.
Co-Authors Anak Agung Caresasha Adinda Dea I Made Purnadiyasa I Wayan Tika Ida Bagus Ary Purnayama Parbawa Komang Ratih Indah Pradnyani Ngadisih Ngadisih