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All Journal Jurnal Ilmu Pertanian Indonesia Journal of Tropical Soils
Susilawati, Helena Lina
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Agriculture, Biological Sciences & Forestry Environmental Science

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The Linkage of Soil pH, Phosphorus Availability, and Exchangeable Aluminum in Andisol and Recommendations for Soil Improvement Erwinda, Erwinda; Muslim, Rufaidah Qonita; Pratamaningsih, Mira Media; Hati, Diah Puspita; Kricella, Pronika; Suryani, Erna; Susilawati, Helena Lina
Jurnal Ilmu Pertanian Indonesia Vol. 30 No. 3 (2025): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.30.3.464

Abstract

The Indonesian government implemented a program known as the Food Estate in Humbang Hasundutan to enhance food security. This initiative involved cultivating strategic food commodities on large-scale agricultural land. The soil type in this area is classified as Andisol, which is naturally fertile. Nevertheless, the food and horticultural crop practices in Andisol scarcely consider soil health, fertility, and sustainability. This study was conducted on the Andisols of Humbang Hasundutan to determine the limiting factors of soil chemical properties to support sustainable land management. Soil samples were collected from the topsoil layer (0-30 cm) at 95 locations using a grid-based sampling system. These samples were analyzed for pH, phosphorus availability, and exchangeable aluminum. The data were examined through correlation tests, with soil improvement levels identified using K-means clustering. The results showed that the Andisols in Humbang Hasundutan had an acidic pH level (5.30), extremely high organic carbon content (8.23%), moderate total nitrogen level (0.44%), extremely low potential and available phosphorus levels (12.66 ppm and 4.15 ppm), very low base saturation (6.48%), and relatively high exchangeable aluminum (Alexch) (1.03 cmol.kg-1). Correlation analysis revealed a negative relationship between pH and P availability, while Alexch showed a positive correlation with P availability. However, P availability in Andisol was not significantly influenced by variations in Alexch or soil pH. Soil improvement recommendations were categorized into three groups: 60 locations requiring very high P fertilization, 28 locations requiring high P fertilization, and 7 locations requiring moderate P fertilization, along with the application of soil amendments, such as dolomite or guano phosphate, to reduce aluminum levels. Keywords: andisol, exchangeable-Al, P availability, soil acidity
Mitigation Scenario for Reducing Greenhouse Gas Emission from Rice Field by Water Management and Rice Cultivars Pramono, Ali; Adriany, Terry Ayu; Susilawati, Helena Lina
JOURNAL OF TROPICAL SOILS Vol. 25 No. 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.53-60

Abstract

Rice production is a significant anthropogenic source of methane (CH4) and nitrous oxide (N2O), two important greenhouse gases (GHGs). Several strategies for reducing GHGs emissions from paddy fields are water management and the use of low emission rice cultivars. The purpose of this study was to determine the effects of water management and rice cultivars on the grain yield and greenhouse gas (GHG) emissions. The research was conducted at the Indonesian Agricultural Environment Research Institute (IAERI), Pati District, Central Java Province during the dry season 2017 (March-June 2017). The study used a factorial randomized block design with the first factor were water managements: A1 = continuous flooding at 5 cm height and A2 = alternate wetting and drying/AWD), and the second factor were rice cultivars: V1 = Ciherang, V2 = Inpari 32, V3 = Mekongga with three replications. All treatments received an equal amount of farmyard manure and inorganic fertilizers. GHG measurements were done by using a closed chamber method. The results of this study indicated that the combination of AWD treatment with Ciherang, Inpari 32, and Mekongga rice cultivars significantly reduced CH4 emissions by 23%, 46%, and 6%, respectively. The Inpari 32 rice variety produced the highest grain yield compared to others, but there were no significant differences in grain yield between all of the treatments. Therefore, AWD technique in combination with Inpari 32 rice cultivar could be a potential option for maintaining the yield-scaled global warming potential of rice production at a lower level, without reducing grain yield.
Co-Authors Adriany, Terry Ayu Ali Pramono Diah Puspita Hati ERNA SURYANI Erwinda Erwinda Kricella, Pronika Muslim, Rufaidah Qonita Pratamaningsih, Mira Media