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Asmita Ahmad

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Author-ID : 2739473

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science

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Mineral Tanah sebagai Indikator Stabilitas Tanah pada Daerah Berlereng: Studi Kasus Tombolopao Kabupaten Gowa Asmita Ahmad; Christianto Lopulisa; A.M Imran,; Sumbangan Baja
Jurnal Ecosolum Vol. 7 No. 1 (2018): JUNI
Publisher : Universitas Hasanuddin

Soil forming process can influence soil stability, especially on a sloping area, which is currently related to landslides. This research aims to study mineral content in the soil as an indicator to evaluate soil stability in slope area. Soil texture analyzed with hydrometer and soil mineral analyzed with Kerr method. Soil parent rock comes from Tpbv (Tertiary Pliocene Baturape Volcanic) Formation that consists of lava, breccia, tuff, and conglomerate. Soil texture in A horizon dominated with silty clay loam and in B horizon with silty clay. Clay content in A horizon to B horizon increase ranges from 2-6%. Soils mineral have been weathering on the physical and chemical, which caused cracking on minerals lattice and formed clay minerals inside it. The presence of clay minerals between soil mineral particles can cause mutual repulsion force and cause friction particles that triggering the movement of particles in a small scale when soil saturated by water and triggers soil movement (landslide).

Pemanfaatan Berbagai Jenis Limbah Rumput Laut terhadap Produktivitas Padi Sawah Hariyati Hariyati; Bachrul Ibrahim; Asmita Ahmad
Jurnal Ecosolum Vol. 7 No. 2 (2018): DESEMBER
Publisher : Universitas Hasanuddin

Various ways have been made to increase the productivity of rice plants as a source of staple food of Indonesian society. One ofthem is the addition of nutrients in the soil (fertilization). Currently, the innovation use of seaweed as fertilizer is widely used in several countries in the world, because seaweed contains phosphorus, potassium, and some other micro elements. This study aimed to analyze the use of various types of waste seaweed to improve the productivity of paddy rice on the ground Vertisol. The study lasted from December 2014 through Sept. 2015, at Greenhouse, Teaching Farm, Faculty of Agriculture, University of Hasanuddin Makassar. The research method is a randomized block design consisting of eight treatments and six replications (48 pot experiment). Each treatment is C0 (control), C1 (fertilizer N 300 kg / ha, P 100 kg / ha and K 100 kg / ha), G1 (Gracilaria 10 g / pot), G2 (Gracilaria 100 g / pot), S1 (Sargassum 10 g / pot), S2 (Sargassum 100 g / pot), K1 (Kappaphycus 10 g / pot), and K2 (Kappaphycus 100 g / pot). The addition of Sargassum seaweed fertilizer waste 100 g / pot and Kappaphycus dose of 100 g / pot can increase K-dd, Na- dd, base saturation, increase the value of N, P, K, and Ca-dd, but administration with concentrations of 100 g / no maximum pot for rice crop production by causing toxicity in plants. The addition of seaweed fertilizer waste treatment Gracilaria 100 g / pot is effective in improving Vertisol soil chemical properties and can provide maximum results for the productivity of rice plants

Identifikasi Mineral Pembawa Hara untuk Menilai Potensi Kesuburan Tanah Indriyani Bali; Asmita Ahmad; Christianto Lopulisa
Jurnal Ecosolum Vol. 7 No. 2 (2018): DESEMBER
Publisher : Universitas Hasanuddin

Soil minerals are very important for plants and can be use to assess the potential of soil fertility. This study aims to assess the potential of soil fertility based on mineral identification in Banggae and Eastern Banggae Subdistrict, Majene District, West Sulawesi Province. The method used in this research is descriptive quantitative, by identifying the minerals in the parent material and soil from thin section using polarizing microscope, quantification method for minerals percentage, and classified of nutrient potential with percentage of mineral content reduced by the percentage content of the quartz. The results showed that the dominant mineral found in the parent material and soil are pyroxene, plagioclase, hornblende, biotite, calcite, quartz and opaque, but the size of mineral are smaller than in the parent material. Potential of nutrients generated in the form of weatherable minerals are biotite, calcite, plagioclase, hornblende and pyroxene containing elements such as Mg, Ca, K, Fe and Na. Potential soil fertility in parent material currently on the moderate criteria (48% to 70%), while on the soil with middle criteria (48% to 70%) in P1L1, P2L1, P4L1, P8L1, P9L1, P10L1, P11L1 and P11L2 and good criteria (73% to 79%) in P3L1, P3L2, P4L2, P5L1, P5L2, P6L1, P7L1 and P9L2. Potential nutrient contained in the mineral is not available for plants, because it has not been supported by external factors such as the low availability of water. This is due to the climate condition especially rainfall in research area is in the range of 949.0 to 2557.1 mm/year with an average annual rainfall of 1608.0 mm/year.

Karakteristik Ukuran Butir dan Mineral Liat Tanah pada Kejadian Longsor (Studi Kasus: Sub Das Jeneberang) Nur Isra; Syamsul Arifin Lias; Asmita Ahmad
Jurnal Ecosolum Vol. 8 No. 2 (2019): DESEMBER
Publisher : Universitas Hasanuddin

Longsor dapat dipicu oleh karateristik tanah yang terbentuk pada suatu wilayah yang dipengaruhi oleh ukuran fraksi tanah, terutama fraksi tanah yang berukuran lebih halus, yaitu fraksi tanah dari mineral liat. Stabililitas wilayah sub DAS Jeneberang pasca kejadian runtuhnya kaldera Gunung Bawakaraeng, menyebabkan gangguan berupa longsoran disekitar wilayah sub DAS lainnya. Penelitian ini bertujuan untuk mengetahui karakteristik ukuran butir dan mineral liat tanah pada kejadian longsor di sub DAS hulu Jeneberang. Penelitian ini menggunakan metode deskriptif kuantitatif dengan mengidentifikasi ukuran butir menggunakan ayakan ASTM 48 dan mineral liat tanah menggunakan FTIR. Titik longsor (TL) ditentukan dari kejadian longsor yang terjadi dan titik pembanding (TPB) ditentukan dari topografi dan bahan induk yang sama dengan titik longsor. Topografi pada daerah penelitian berombak hingga sangat curam dengan rata-rata curah hujan delapan tahun terakhir 3484 mm/tahun. Hasil analisis Ukuran butiran pada semua titik longsor dan titik pembanding didominasi ukuran 0,5 mm dengan bentuk butiran subrounded pada TL1, TL3, TL5, TL6, TL7, TL8, TL 10, TPB3, TPB4 dan subangular pada TL2, TL4, TL9, TPB1, TPB2. Dari hasil analisis mineral liat bahwa mineral liat dominan pada TL1, TL2, TL3, TL10, TPB1, TPB2 adalah kaolinit. TL6, TL5 adalah haloisit. TL8, TL4 adalah montmorilonit. TL9, TL7, TPB3 adalah klorit dan TPB4 adalah nakrit. Longsor yng terjadi dipicu oleh mineral liat tersedia yaitu kaolinit, haloisit, montmorilonit, dan klorit, sementara ukuran butir tanah tidak memberikan banyak pengaruh pada kejadian longsor.Kata kunci: Sub DAS Jeneberang, Longsor, Ukuran Butir, Mineral Liat Tanah

SOIL FERTILITY MAPPING OF CORN PLANT BASED ON MINERALS IN JENEPONTO REGENCY Asmita Ahmad
Jurnal Ecosolum Vol. 10 No. 2 (2021): DESEMBER
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v10i2.18682

One of the efforts to optimize the growth and production of corn is by potential mapping areas for its development. Minerals are the main elements that have an important role in soil formation and determine the physical and chemical properties of the soil. Minerals are one of the essential indicators related to soil weathering, so the presence or absence of minerals in the soil can indicate how soil formation occurs, especially soil fertility on the land. Jeneponto is one of the corn-producing districts in South Sulawesi, so it is imperative to map its soil fertility based on soil mineral content to be sustainable. The research method used purposive sampling on cornfields in Jeneponto Regency. Soil mineral analysis was carried out using a thin section method, while the analysis of the physical and chemical properties of the soil, including pH, C-organic, and soil texture, followed the BPT procedure; the map was generated using the weighting method and processed by kriging. The results showed that the pH value of the soil was in the slightly acidic to neutral range; C-organic soil had low status in the eastern area and moderate status in the western area of the study site. The soil texture is dominated by clay, silty clay, and silty clay loam. The dominant easily weathered minerals are calcite, pyroxene, and hornblende. Soil fertility status based on nutrient-carrying minerals is in the moderate to the good range with a value of 55-75%. The potential for developing corn plants with priority status is in the Districts of West Bangkala and Bangkala. The second priority is in the Districts of Tamalatea, Batang, Kelara, Rumbia, and parts of Bontoramba, Tarowang, and Arungkeke

Co-Authors A.M Imran, Bachrul Ibrahim Hery Widijanto Indriyani Bali Lias, Syamsul Arifin Lopulisa, Christianto Nur Isra Sumbangan Baja

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