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All Journal International Journal of Technology and Education Research
Hayatiningsih Gubali
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Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Other

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Chemical and Physical Characteristics of Soils under Maize (Zea mays L.) Cultivation in Pulubala District, Gorontalo Regency Erwan Djunaid Abukaria; Zulzain Ilahude; Fitria S. Bagu; Mahyunita Abdul Gafur; Hayatiningsih Gubali
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.v4i01.2996

Abstract

Soil fertility is a key factor influencing maize productivity, particularly in intensive agricultural areas. This study aimed to evaluate the chemical and physical soil properties of maize (Zea mays L.) fields in Pulubala District, Gorontalo Regency, Indonesia. The study was conducted from April to May 2025 in three maize-growing villages, namely Mulyonegoro, Puncak, and Molalahu. Soil samples were collected using a diagonal sampling technique at a depth of 0–30 cm. Soil physical properties analyzed included texture, bulk density, and water content, while chemical properties comprised soil pH, organic carbon, total nitrogen, available phosphorus (Olsen P₂O₅), exchangeable potassium, cation exchange capacity, and base saturation. The results indicated that soils in the study area were generally slightly acidic, with low organic carbon, low available phosphorus, and low base saturation, despite moderate nitrogen and high potassium availability. These conditions indicate that low organic matter content and phosphorus deficiency are the main limiting factors for soil fertility in the maize fields of Pulubala District. Integrated soil management practices, including organic matter application and balanced fertilization, are required to improve soil quality and support sustainable maize production.
Growth Response of Tomato Plants (Lycopersicum esculentum Mill.) to Liming and Fertilizer Types on Acid Soils Yakop S. Laginda; Hayatiningsih Gubali; Sutrisno Hadi Purnomo
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.v4i01.3032

Abstract

Acid soils with low pH are a major constraint for tomato cultivation in Indonesia, including in Kwandang District, North Gorontalo Regency, which has a soil pH of 5.23. This study aimed to determine the growth response of tomato plants (Lycopersicum esculentum Mill.) to liming and fertilizer types on acid soils. The research was conducted in Molingkapoto Village, Kwandang District, North Gorontalo Regency, for four months (November 2025–February 2026). A Factorial Randomized Block Design was employed with two factors: agricultural lime dosage (K0 = no lime; K1 = 1,000 g/plot; K2 = 1,300 g/plot) and fertilizer type and dosage (P0 = no fertilizer; P1 = organic fertilizer 7,000 g/plot; P2 = NPK fertilizer 8 g/plant), replicated three times for 27 experimental units. Parameters observed included plant height, leaf number, leaf color score, and leaf area index at 14, 30, and 44 days after planting (DAP). Results showed that liming at 1,300 g/plot (K2) and NPK fertilizer at 8 g/plant (P2), both independently and in combination (K2P2), produced the best growth across all parameters at 44 DAP: plant height, leaf number, leaf color score, and leaf area index. Liming improved soil pH and increased macro and micronutrient availability, while NPK fertilizer provided essential nutrients rapidly available to the plant.
Co-Authors Erwan Djunaid Abukaria Fitria S. Bagu Mahyunita Abdul Gafur Sutrisno Hadi Purnomo Yakop S. Laginda Zulzain Ilahude