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All Journal International Journal of Technology and Education Research
S. Bagu, Fitria
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Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Other

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Effect of Various Organic Fertilizer Treatments on Soil Bulk Density and Soil Color in Yardlong Bean (Vigna sinensis L.) B. Hamsa, Jamaludin; Nurmi; S. Bagu, Fitria; Zulzain Ilahude; Yunita Rahim
International Journal of Technology and Education Research Vol. 4 No. 01 (2026): January- March, International Journal of Technology and Education Research (IJ
Publisher : International journal of technology and education research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijeter.v4i01.3022

Abstract

Yardlong bean (Vigna sinensis L.) is one of the secondary food crops with considerable potential as a food source; th erefore, improvements in cultivation practices are required to enhance its productivity. One effort to increase yardlong bean production is through the application of organic fertilizers, such as chicken manure and cattle manure. This study aimed (1) to evaluate the effects of chicken manure and cattle manure application on soil bulk density (BD) and soil color in yardlong bean cultivation, and (2) to determine the optimal dosage of these organic fertilizers for improving BD and soil color. The study was conducted from September to January 2026 in Tunggulo Village, Tilong Kabila Subdistrict, Bone Bolango Regency, Gorontalo Province, Indonesia. The experiment employed a Randomized Block Design (RBD) consisting of five treatments: P0 (control, without fertilizer), P1 (chicken manure at 10 t ha⁻¹), P2 (chicken manure at 20 t ha⁻¹), P3 (cattle manure at 10 t ha⁻¹), and P4 (cattle manure at 20 t ha⁻¹). Data were analyzed using analysis of variance (ANOVA) followed by the Honestly Significant Difference (HSD) test, and correlation analysis was conducted to examine the relationship between BD and the growth and yield of yardlong bean. The results indicated that the application of chicken manure and cattle manure had no significant effect on soil bulk density and soil color.
Spatial Mapping of Soil Chemical and Physical Properties in Maize (Zea mays L.) Cultivation Areas in Mootilango District, Gorontalo Regency, Indonesia Mohune, Ramlan; Ilahude, Zulzain; S. Bagu, Fitria; Bahua, Mohamad Ikbal; Jamin, Firiah
International Journal of Technology and Education Research Vol. 4 No. 02 (2026): International Journal of Technology and Education Research (IJETER)
Publisher : International journal of technology and education research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijeter.v4i02.3277

Abstract

Maize (Zea mays L.) is a strategic commodity in Mootilango District; however, its productivity is still constrained by variations in soil quality. This study aimed to map the chemical and physical status of soils in maize cultivation areas in Mootilango District, Gorontalo Regency, Indonesia. A field survey and laboratory analysis were conducted using composite soil sampling from three villages, namely Pilomonu, Huyula, and Satria, representing different slope conditions. Soil chemical parameters, including organic carbon (C-organic), pH, cation exchange capacity (CEC), nitrogen (N), phosphorus (P), and potassium (K), as well as physical parameters such as soil texture, bulk density, and soil color, were analyzed. The data were spatially processed and presented using ArcGIS 10.3 to generate thematic soil maps. The results indicated that soil chemical status was generally suboptimal, characterized by low to very low levels of C-organic, N, and P, and acidic to slightly acidic soil pH (5.3–6.3), despite having high to very high CEC values. In terms of physical properties, soils were predominantly silty clay, while bulk density values in Pilomonu and Satria were relatively high (>1.70 g/cm³), indicating soil compaction. Spatial mapping identified three management zones: (1) areas with severe chemical constraints (Pilomonu: very acidic pH and low organic carbon), (2) areas with moderate chemical constraints (Satria: slightly acidic pH and low organic carbon), and (3) areas with critical organic matter limitations (Huyula: very low organic carbon with optimal bulk density). It can be concluded that improving soil fertility requires site-specific management practices, including liming, organic matter enhancement, balanced fertilization, and appropriate conservation tillage practices to support sustainable maize production.
Co-Authors B. Hamsa, Jamaludin Jamin, Firiah Mohamad Ikbal Bahua Mohune, Ramlan Nurmi Yunita Rahim Zulzain Ilahude