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All Journal Warta Rimba Journal of Degraded and Mining Lands Management
Ongky, Ongky
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education

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KEANEKARAGAMAN JENIS BURUNG DI HUTAN PRODUKSI DESA MALONAS KECAMATAN DAMPELAS KABUPATEN DONGGALA Ongky, Ongky; Korja, I Nengah; Sustri, Sustri
Jurnal Warta Rimba Vol 8, No 3 (2020)
Publisher : Universitas Tadulako

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Abstract

Indonesia ranks fourth in the world to the number of birds after Colombia, Peru, and Brazil.  The Sulawesi island species settler bird around 224 species land and fresh water bird, which is 41 species of them were endemic types and the most endemic bird found in the Sulawesi island. The Malona’s village forest production includes the work KPH Dampelas, the forest production was of hills and mountains  so that the environment has such a variety of plants that they provide food, make a nests, and shelter from any threat to this particular type of bird .The research aims to identify the diversity of birds in the forest production. The research was in forest production areas at the KPH Dampelas workplace, Malonas Village, Dampelas District, Donggala Regency on February-March 2019. observation locale in open and closed habitats, the method used was  point count. Data processing by analyzing the composition of birds, diversity of kinds, attendance rates of kinds, index arrangement  of kinds, kind of domination. The result was found 20 species of birds with 134 individuals, include 10 famili and 11 species built-in as endemic of birds. The value of the diversity index in forests of H '= 2.85 shows that the index of diversity of that type is moderate, the value of the index of E= 0.95 it shows the distribution of the relative uniform between species and there are 9 kinds of birds with an individual being so abundant that it becomes the dominant type of bird.Keywords: Birds, Forest Production, Biodiversity
Spatial distribution of nutrients to determine soil fertility in mixed farming based on geostatistical Kriging Katili, Hidayat Arismunandar; Sariani, Sariani; Ongky, Ongky
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.120.7723

Abstract

Soil fertility maps are vital tools in agriculture and land management, offering essential information for decision-makers. The availability of soil nutrients significantly impacts crop production. This study aimed to assess soil nutrient content and develop a soil fertility map for mixed farmland in the Banggai Islands region of Central Sulawesi, Indonesia. The research involved soil sampling at a depth of 0-20 cm from 60 random points, followed by laboratory analysis and geostatistical interpolation using the Kriging Semivariogram (Spherical) method in ArcGIS to create the soil fertility status map. Validation was conducted using absolute mean error (AME) and absolute error of variation (AVE). Results indicated that soil pH in the area ranged from slightly acidic to neutral, while organic C, nitrogen, and cation exchange capacity were evenly distributed but classified as low to medium fertility. Potassium levels were consistently low across the study area. Additionally, available phosphorus varied from low to very high, and base saturation was predominantly high to very high. By overlaying the nutrient distribution maps, three soil fertility categories, very low, low, and medium, were identified. These findings offer valuable insights into nutrient management and sustainable agricultural practices in the Banggai Islands, Central Sulawesi.
Co-Authors I Nengah Korja Katili, Hidayat Arismunandar Sariani Sustri Sustri