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All Journal SAINS TANAH - Journal of Soil Science and Agroclimatology Agrosains: Jurnal Penelitian Agronomi AgriHealth: Journal of Agri-food, Nutrition and Public Health
Suntoro Suntoro
Department of Soil Science, Faculty of Agriculture, Universitas Sebelas Maret, Surakarta
Agriculture, Biological Sciences & Forestry Education Environmental Science Health Professions Public Health

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Effect of Sugarcane Bagasse Bio-Compost and Manure on Carbon Fraction and N, P, K Content in Entisols and Their Relationship with Shallot Yields Lidya Zaela Wijaya; Jauhari Syamsiyah; Suntoro Suntoro; Slamet Minardi; Rahayu Rahayu
AgriHealth: Journal of Agri-food, Nutrition and Public Health Vol 6, No 1 (2025): April
Publisher : Research and Development Center for Food, Nutrition and Public Health (P4GKM) LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agrihealth.v6i1.99420

Abstract

Bagasse, one of the largest agricultural wastes with suboptimal utilization, could improve Entisols in the tropics by enhancing soil fertility and crop productivity. This study aimed to determine the changes in humic substances and nutrient levels in Entisols and their effects on shallot yield. The study was designed using a completely randomized design, consisting of four treatments of organic matter combinations with NPK fertilizer, four single organic matter treatments, one standard NPK fertilizer dose, and one control. Each was replicated three times. The results showed that using bagasse improved soil conditions by increasing C content and nutrient levels in the soil, enhancing nutrient absorption by plants, and consequently boosting crop yields. The biochar + bagasse compost (2:4) (bio-compost) + NPK resulted in high soil organic C, humic acid, fulvic acid, nutrient availability, and plant nutrient levels, which were comparable to the manure treatment, and significantly increased shallot yield in Entisols. The findings of this study could support the development of nutrient management strategies utilizing bagasse as a potential soil amendment for Entisols.
Effect of Inorganic Fertilization Methods on Growth and Yield of Soybean on Alfisol Ongko Cahyono; Suntoro Suntoro; Siti Maro'ah; Silfi Berliana Putri; Juan Yherin Wihangga
Agrosains : Jurnal Penelitian Agronomi Vol 27, No 2 (2025): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v27i2.109325

Abstract

The ever-increasing demand for soybeans has not been matched by increased yields. This is partly due to farmers not fertilizing properly. Many farmers apply urea, SP36, KCl, or compound NPK fertilizers at doses that are inappropriate for the plants' needs. Many even fertilize haphazardly. Appropriate fertilization methods are needed. This study aims to determine the effect of some of fertilization methods on soybean growth and yield on Alfisol. This study used a completely randomized block design (RCBD) with five treatments and five replications. PT0 (no fertilizer), PT1 (Farmer's Method: Urea, SP36, and KCl), PT2 (Balanced Fertilization Method: Urea, SP36, and KCl), PT3 (Farmer's Method: NPK Compound Fertilizer), PT4 (Balanced Fertilization Method: NPK Compound Fertilizer). The results of this study show that inorganic fertilizers given in a balanced manner can increase soybean yields from 2.28 g/plant to 13.82 g/plant. The results of this study indicate that the best treatment method, PT2 (Balanced Fertilization Method: Urea, SP36, and KCl), is able to support plant growth and increase soybean yields.
Peat hydraulic properties along the gradient of oil palm ages in the tropical monsoon region Nuraeni Dwi Dharmawati; Komariah Komariah; Suntoro Suntoro; Hermantoro Hermantoro; Azmal Hossan
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 2 (2025): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i2.105943

Abstract

The conversion of vast peatland areas to oil palm plantations in Indonesia may alter hydrological functions under long-term agricultural use. This study aimed to analyze the hydraulic properties of peat soil under oil palm (Elaeis guineensis Jacq.) plantations of varying ages (2–5, 6–9, and >10 years) in Ketapang, West Kalimantan, Indonesia, a region with a tropical monsoon climate. There are 27 samples gathered from 3 plantation ages in the 3 peat depths (0-20 cm, 20-40 cm, and 40-60 cm). Hydraulic properties: water holding capacity (WHC), bulk density, particle density, and porosity were analyzed using standard gravimetric, pycnometer, and oven-drying methods. Weather and environmental data from 2013–2022 were used to calculate reference evapotranspiration (ETo), crop evapotranspiration (ETc), and water balance. The results showed that hydraulic properties improved with soil depth and plantation age. WHC ranged from 400% to 850%, increasing significantly in mature plantations. Bulk density declined with depth and age, while porosity significantly increased and reached its maximum at 56.87% in older plantations. Although mature oil palms have high crop water demands (ETc), water availability remains sufficient to meet their needs. However, excess water must be properly managed to avoid reducing oil palm productivity and to preserve peat quality. These findings suggest that as oil palm matures, root development and organic residue accumulation enhance peat’s hydrological properties. This study may contribute to understanding peatland behavior under oil palm cultivation and provide crucial insight for improving irrigation and land management practices in tropical peat ecosystems.
Co-Authors Azmal Hossan Eka Putri Sri Suwatanti Hermantoro Hermantoro Jauhari Syamsiyah Juan Yherin Wihangga Kharisma Kusuma Wardani Komariah Komariah Lidya Zaela Wijaya Maridi Maridi Nuraeni Dwi Dharmawati ongko cahyono Rafika Nur Kusumawati Rahayu Rahayu Silfi Berliana Putri Siti Maro’ah Slamet Minardi