relation: https://eprints.untirta.ac.id/51592/ title: PENGUKURAN KEANEKARAGAMAN SERANGGA DAN RESPIRASI TANAH PADA BEBERAPA USIA TANAM KELAPA SAWIT (Elaeis guineensis Jacq) DI PT PERKEBUNAN NUSANTARA IV KEBUN CIKASUNGKA creator: Ardiansyah, Ilhan subject: S Agriculture (General) description: Soil insects play an important role in maintaining soil fertility and structure through the process of decomposition of organic matter, which is closely related to soil respiration as an indicator of soil biological activity. This research aims to measure soil insect diversity, soil respiration values, and the relationship between the two on oil palm land with different planting year at PTPN IV Kebun Cikasungka. The research was carried out descriptively-quantitatively at three planting ages (2001, 2005, and 2009) using exploratory and purposive sampling methods. Insect data was collected using pitfall trap, then identified and analyzed for diversity indices. Soil respiration was measured through analysis of CO₂ decomposition results. The research results showed that the composition of soil insects was the highest in the 2001 planting year. The highest diversity index was in the medium category in the 2009 planting year. The highest dominance index value in the 2001 planting year was in the medium category. The highest C-organic and C/N values were in the 2001 planting year. The highest soil respiration and N-total values were in 2005. The highest pH values were in the 2009 planting year (6,5). The correlation values of each soil fauna with chemical properties and soil respiration showed positive and negative correlations. Soil insects obtained from the research location have roles that are divided into 4 roles, namely predators, herbivores, detritivores, and pest. date: 2025 type: Thesis type: NonPeerReviewed format: text language: id identifier: https://eprints.untirta.ac.id/51592/1/Ilhan%20Ardiansyah_4442210063_Full%20Text.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/2/Ilhan%20Ardiansyah_4442210063_01.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/3/Ilhan%20Ardiansyah_4442210063_02.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/4/Ilhan%20Ardiansyah_4442210063_03.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/5/Ilhan%20Ardiansyah_4442210063_04.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/6/Ilhan%20Ardiansyah_4442210063_05.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/7/Ilhan%20Ardiansyah_4442210063_Ref.pdf format: text language: id identifier: https://eprints.untirta.ac.id/51592/8/Ilhan%20Ardiansyah_4442210063_Lamp.pdf identifier: Ardiansyah, Ilhan (2025) PENGUKURAN KEANEKARAGAMAN SERANGGA DAN RESPIRASI TANAH PADA BEBERAPA USIA TANAM KELAPA SAWIT (Elaeis guineensis Jacq) DI PT PERKEBUNAN NUSANTARA IV KEBUN CIKASUNGKA. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.