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All Journal SAINS TANAH - Journal of Soil Science and Agroclimatology Inisiasi Jurnal Pengabdian Sosial
Wiratama, Ristiya Adi
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Intercalation and calcination as methods to reduce expansive soil properties Wiratama, Ristiya Adi; Hanudin, Eko; Purwanto, Benito Heru
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 18, No 1 (2021): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v18i1.46735

Abstract

The expansive ability of soil causes a series of problems in various sectors. The dominance of smectite clay minerals significantly affects expansive ability because they have an unstable interlayer structure. Cation intercalation and calcination is a treatment method that can increase the stability of the clay interlayer structure. This research investigated the effects of intercalation cations and calcination treatment on the swelling ability and cracking properties in the clay from vertisols; the cations used for intercalation were aluminum and iron. The intercalation tested doses were based on the equivalent weight of 0x, 0.5x, and 1x cation exchange capacity (CEC) clay value. The calcination treatments used were 200°C, 300°C, and no calcination. Each treatment interaction was repeated three times. Parameters observed were the total area, average crack width, average lump area, total number of lumps, moisture content, swelling volume, and pH after treatment. The results showed that each treatment had a significant effect. Clay with an Al intercalation dose of 1x CEC without calcination treatment had the highest total area after drying, which was 41.035 cm2; the lowest average crack width was 0.153 cm, and the smallest swelling volume was 3.6 cm3. In contrast, the clay without intercalation and calcination treatments had a swelling volume up to 10 cm3 on the 7th day. The clay with an Al intercalation dose of 1x CEC with 200°C calcination exhibited the best results in reducing the expansive clay ability and can be used as a guideline for further testing to reduce the soil’s expansive ability.
Pengembangan Agroeduwisata Kopi Arabika dan Konservasi sebagai Strategi Pemberdayaan Masyarakat di Desa Petarangan Ummah, Annisa Syifaul; Wiratama, Ristiya Adi
Jurnal Pengabdian Sosial Vol. 2 No. 11 (2025): September
Publisher : PT. Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/g64ktv79

Abstract

Program Kuliah Kerja Nyata (KKN) Tematik Universitas Sebelas Maret 2025 di Desa Petarangan dilaksanakan untuk mengoptimalkan potensi kopi arabika melalui pendekatan agroeduwisata dan konservasi lingkungan. Kegiatan meliputi sosialisasi budidaya kopi berkelanjutan, pelatihan pengolahan limbah kopi menjadi produk bernilai ekonomi, promosi digital wisata kopi, pemeriksaan kesehatan gratis, edukasi konsumsi kopi sehat, serta pembinaan minat bakat anak-anak melalui Ruang Ceria. Puncaknya, Festival Kopi Desa menjadi ajang pameran produk dan penampilan minat bakat dari program kerja Ruang Ceria. Hasil kegiatan menunjukkan peningkatan pemahaman petani terhadap teknik budidaya, lahirnya produk inovatif berbasis kopi, meningkatnya kesadaran kesehatan, serta terbangunnya citra Desa Petarangan sebagai destinasi agroeduwisata. Program ini terbukti berkontribusi pada pemberdayaan masyarakat dan mendukung pembangunan berkelanjutan di bidang ekonomi, sosial, dan lingkungan.
PENGARUH PUPUK BIOFILMED FERTILIZER TERHADAP HASIL BAWANG MERAH PADA TANAH ALFISOL JUMANTONO Wiratama, Ristiya Adi; Iswari, Aryani Tri; Sumarno; Sudadi; Widijanto, Hery
Inisiasi Volume 14, Edisi 2, Desember 2025
Publisher : Badan Perencanaan Pembangunan Daerah dan Penelitian dan Pengembangan Kabupaten Wonogiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59344/inisiasi.vi.340

Abstract

Shallot requires sulfur nutrient to improve color, flavor and reduce shrinkage during it storages as well as to enlarge the shallot bulbs. Alfisols had low available sulfur so biofilmed fertilizer application was expected to increase S-uptake nutrient and yield of shallot production. This research was conducted at the Research Center and Development of Dryland of Sebelas Maret University Surakarta in Jumantono, Karanganyar in June 2014 to March 2015 to study the effect of formula and dosage of biofilmed fertilizer on S-uptake and yield of shallot. The experiment was arranged in factorial completely randomized design (CRD) with two factors, namely three formulas and four dosages of biofilmed fertilizer. The variables observed were available S, S-uptake, growth and yield of shallot. Data was analyzed by F test followed by DMRT at 95% of level confident. The results showed that biofilmed fertilizer formula and dosage affected significantly on S-available and S-uptake at harvest. Biofilmed fertilizer with F1 (consortium of sulfur oxidizing bacteria, solvent fungi K, solvent bacteria P, and fastening bacteria N2) and D2 was 100% equivalent to dosage recommendation of NPK and gave the highest of shallot yield 54,634g or equivalent to 14.53 tons/ ha.
Co-Authors Benito Heru Purwanto Eko Hanudin Hery Widijanto Iswari, Aryani Tri Sudadi Sumarno Ummah, Annisa Syifaul