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EVALUASI STATUS HARA DAN PENYUSUNAN REKOMENDASI PEMUPUKAN DI PERKEBUNAN KELAPA SAWIT (Elaeis guineensis Jacq.) SEMBAWA BANYUASIN Airiyani, Mey Linda; Hermawan, Agus; Fadli, Bori Heria; Yanti, Anita Andri
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 2 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.2.7

Abstract

Oil palm productivity can be increased by optimizing the availability of nutrients in the soil. Evaluation of nutrient status can be done to determine the level of nutrient availability for plants and as a basis for compiling site-specific fertilizer recommendations. This study aimed to evaluate the soil nutrient status in oil palm plantations at SMK PPN Sembawa Banyuasin and to compile fertilizer dose recommendations according to plant nutrient needs and nutrient availability in the soil. Analysis of chemical and physical properties of the soil was carried out at the Analytical Laboratory of PT. Binasawit Makmur Palembang. The parameters observed were pH, C-Organic, N, P, K, CEC, Al-dd and Soil Texture. This study used a detailed survey method on an area of 5 ha. Soil sampling was carried out at 5 observation points at a depth of 0-30 cm. The results of the study showed that the soil nutrient status at the research location had acidic soil pH conditions, low organic carbon, very low to low availability of N, P, K nutrients and low soil CEC. The soil texture class at the study location was Dusty Clay Loam. The low availability of nutrients at the study location caused the production of oil palm plants to be less than optimal. The calculation of the recommended fertilizer dose for 14-year-old oil palm plants at the study location was, with an average of 225.75 kg of Urea/ha/year or 1.83 kg/tree/year, SP-36 as much as kg/ha/year or 1.42 kg/tree/year, and KCl as much as 226.65 kg/ha/year or 1.83 kg/tree/year.
Field Testing a Research-Based Enrichment Module to Improve Students' Cognitive Learning Outcomes in Biodiversity Arlika, Herlin; Anggun, Diah Putri; Yanti, Anita Andri
Bioedunis Journal Vol 4, No 2 (2025)
Publisher : UIN Syekh Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/bioedunis.v4i2.18838

Abstract

The research-based enrichment module is a teaching material designed from recent studies and aligned with relevant learning content. This module aims to enrich students’ knowledge, improve their critical thinking skills, and enhance their understanding of current scientific concepts. This study investigated the effectiveness of a research-based enrichment module on karamunting plant identification in improving students’ learning outcomes. An experimental design with a pretest-posttest control group was applied. The population included 157 Grade X students at SMK Pertanian Pembangunan Negeri Sembawa. Using cluster sampling, 30 students from Grade X ATP 1 (control) and 30 from Grade X ATP 2 (experimental) were selected. The experimental group used the enrichment module, while the control group did not use any additional learning materials. Data were collected through cognitive learning outcome tests and analysed using descriptive statistics and a paired sample t-test. Results showed the experimental group achieved a mean post-test score of 81.67, compared to 70.50 in the control group. The paired sample t-test indicated a significant effect (p = 0.000, p 0.05). Thus, the enrichment module on karamunting identification significantly improved students’ cognitive learning outcomes.