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All Journal Jurnal Pengabdian Magister Pendidikan IPA Journal of Saintech Transfer International Journal of Science and Environment
Hilwa, Walida
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics Physics Other

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Journal : International Journal of Science and Environment

 1 
The Relation Ship Between Total Soil Microbes With N, P , K Nutrient Levels By Paddy Plant (Case Study In Ajamu Village, Panai Hulu District, Labuhanbatu Regency) Renaldy, Kurnia; Hilwa, Walida; Rizal, Khairul; FS, Harahap
International Journal of Science and Environment (IJSE) Vol. 2 No. 2 (2022): May 2022
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.69 KB) | DOI: 10.51601/ijse.v2i2.17

Abstract

The neglect of returning organic matter to the soil and the intensive use of chemical fertilizers inpaddy fields have caused the physical, chemical, and biological quality of the soil to decline. Such soilconditions cause the population of soil biota that plays a role in nitrogen fixation and phosphatesolubility to decrease. This study aims to determine the relationship between total microbes andnutrient levels of N, P, K in rice plants in Ajamu Village, Panai Hulu District, Labuhan Batu Regency.This research was conducted from December 2021 to January 2022. Sampling was carried out bytaking leaves and rhizosphere soil of rice plants at 5 zigzag sampling points in a rice field area.Parameters observed in this study were nutrient levels of N, P, K and total microbes. The analysis wascarried out using correlation and regression methods.
Isolation And Characterization Of Phosphate Solubilizing Fungi From Fruit And Vegetable Peel Waste Compost Fertilizer Desi Sasmita, Sri Wulan; Hilwa, Walida; Badrul Ainy , Dalimunthe; FS, Harahap
International Journal of Science and Environment (IJSE) Vol. 3 No. 2 (2023): May 2023
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v3i2.66

Abstract

Phosphate solubilizing fungi are fungi that can convert phosphate in soil from compound form (almost insoluble) into ionic form (easily soluble) so that it can be utilized by plants. The purpose of this study was to determine the isolation and characteristics of phosphate solubilizing fungi isolates found in fruit and vegetable peel waste compost. This research was conducted in January 2023 until completion in the Laboratory of the Faculty of Science and Technology, Labuhanbatu University. This research was carried out by isolating fungi from municipal waste compost, characterizing morphology and the ability to dissolve phosphate and molecular identification. Furthermore, the data were analyzed descriptively based on the research results obtained. There were 4 isolates of phosphate solubilizing fungi that were able to form clear zones on Pikovskaya media with different morphological characteristics and ability to dissolve phosphate. The largest clear zone diameter was shown in isolate A3 of 3 cm which is Aspergillus niger fungus.
Prediction of Erosion Using The USLE Method in Community Oil Palm Plantations in Kualuh Selatan District, North Labuhanbatu Syawa Harahap, Fitra; Hilwa, Walida; Rauf, Abdul; Rahmanta, Rahmanta; Harahap, Arman; Sulaiman, Harahap; Sudarijah; Mohamad , Siarudin; Syafrudin , Syafii; Muhammad , Rizwan; Indra, Gunawan
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026 (Indonesia - Jepang - Malaysia - United Kingdom)
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.280

Abstract

The process of erosion leads to the loss of fertile topsoil and a reduction in the soil's capacity to store and absorb water. At the research site, community oil palm plantations in Tanjung Pasir Village, Kualuh Selatan District, North Labuhanbatu Regency, land clearing was conducted through logging, and in some cases, burning. Subsequent plantation management was carried out without implementing soil conservation measures and while disregarding environmental factors, resulting in soil degradation and productivity decline linked to erosion. This study aims to predict the magnitude of erosion using the Universal Soil Loss Equation (USLE) method, calculate the tolerable soil loss, and analyze the erosion hazard level. The USLE method was applied by calculating the causative factors of erosion: rainfall erosivity (R), soil erodibility (K), slope length and steepness (LS), cover management (C), and conservation practices (P). The predicted erosion values were then compared to the tolerable soil loss values to determine the necessity of conservation interventions. The results indicate that the highest predicted erosion value (A) was 521.73 tons/ha/year on plot KS1, while the lowest was 111.09 tons/ha/year on plot KS5. Meanwhile, the tolerable soil loss (TSL) ranged from 43.86 to 64.38 tons/ha/year. Based on this comparison, two classes of erosion hazard were identified: very high and high. Both classes exhibited predicted erosion values far exceeding the permissible limits. Therefore, conservation measures are imperative, one of which involves planting dense Legume Cover Crops (LCC).  
Co-Authors Abdul Rauf Abdul, Rauf Badrul Ainy , Dalimunthe Benny, Hidayat DE, Harahap Desi Sasmita, Sri Wulan Fauzi Ahmad , Syawaluddin FS, Harahap Harahap, Arman Harahap, Fitra Syawal Harahap, Parmanoan Indra, Gunawan Khairul , Rizal Mohamad , Siarudin Muhammad , Rizwan Rahmanta Rahmanta, Rahmanta Rahmawaty, Rahmawaty Renaldy, Kurnia Reni Diah, Kusumawati Rizal, Khairul Rosmidah , Hasibuan Sudarijah Sulaiman, Harahap Syafrudin , Syafii Syawa Harahap, Fitra T., Sabrina