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Jurnal Tanah dan Air
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
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Articles 5 Documents
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Search results for , issue "Vol 22 No 1 (2025): June 2025" : 5 Documents clear
Assessment of Soil Chemical Fertility Status in Wukirsari Sub-District, Cangkringan, Sleman, Special Region of Yogyakarta : Kajian Status Kesuburan Kimia Tanah di Kalurahan Wukirsari, Kapanewon Cangkringan, Kabupaten Sleman, Daerah Istimewa Yogyakarta Fransisca, Ema; Amiadji Julianto, Eko
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15253

Abstract

Agricultural productivity is influenced by soil fertility, which depends on the nutrient content of the soil as well as the land use and management practices applied. The objective of this study is to identify the chemical properties of the soil, determine its chemical fertility status, and analyzed limiting factors. The research was conducted from December 2024 to February 2025 using survey methods and laboratory analysis according to the criteria of the Soil Research Center (1995). Representative sample points were determined by purposive method on the overlay results of thematic maps (Land Use Maps, Slope Maps, Elevation Maps) and resulted in 12 Land Units. The analysis results showed that the Cation Exchange Capacity (CEC) values range from 2,2 - 7,55 cmol (+)/kg classified as very low to low, Base Saturation (BS) ranges from 56,24 - 99,99% categorized as high to very high, P2O5 was 59,66 - 88,37 mg/100g classified as high to very high, K2O was 2,09 - 15,51 mg/100g categorized as very low to low, C-organic was 0,46 – 2,38% classified as low to moderate, and pH H2O was 4,83 – 7,7 indicating acidic to slightly alkaline conditions therefore the status of soil chemical fertility obtained 2 status, very low covering an area of 373,19 ha (39,42%) and low covering 600,09 ha (60,58%). The low fertility status is mainly influenced by the low Cation Exchange Capacity, content of K2O, and Organic Carbon.
Estimation of Potassium Content in Salak Plants Using Green Normalized Difference Vegetation Index Method in Wonokerto Village, Turi, Sleman, Yogyakarta: Estimasi Kandungan Kalium pada Tanaman Salak Menggunakan Metode Green Normalized Difference Vegetation Index di Kalurahan Wonokerto, Turi, Sleman, Yogyakarta Ramadhani Muhammad Yusuf Ardiansyah; Virgawati, Sari
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15258

Abstract

Salak (Salacca zalacca) is a major horticultural crop in Sleman Regency, Yogyakarta, yet recent years have seen a decline in its productivity, potentially due to potassium (K) deficiency. This study aims to estimate potassium content in Salak plant tissues using the Green Normalized Difference Vegetation Index (GNDVI) derived from Sentinel-2 satellite imagery and to evaluate the accuracy of this approach against laboratory-based measurements. The research was conducted in Wonokerto Village, Turi District, Sleman Regency, employing a quantitative descriptive method. A total of 30 sampling points were selected, comprising 20 prediction points and 10 reference points. GNDVI values were extracted through Sentinel-2 image processing using ArcGIS software, while potassium content in leaf tissue was determined via the wet digestion method using HNO₃ and HClO₄. Leaf samples were collected from the central part of the midrib, serving as a physiological indicator of plant nutrient status. Statistical analyses included Pearson’s correlation, linear regression, paired sample t-test, and Root Mean Square Error (RMSE) assessment. The findings revealed a correlation coefficient (r) of 0.604, indicating a strong positive relationship between GNDVI and potassium content. The regression analysis showed no significant difference between predicted and observed values, while the RMSE value of 0.19445 suggested a low prediction error. These results demonstrate that GNDVI has strong potential as a non-destructive, efficient, and cost-effective tool for estimating potassium levels in Salak plant tissues. The resulting prediction map can be applied to support more precise potassium fertilization strategies in Salak cultivation within the study area.
Characterization of Functional Groups in Sengon Biochar Under Various Pyrolysis Temperatures: Karakterisasi Gugus-Gugus Fungsional Biochar Sengon pada Perlakuan Berbagai Suhu Pirolisis NADA SALSABILA PRADHANI; DJOKO MULYANTO
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15260

Abstract

The decline in soil quality due to pollution and the depletion of nutrients can be addressed by using biochar as a soil conditioner. This study utilized sengon biochar pyrolyzed at temperatures of 300°C, 500°C, and 700°C to analyze differences in functional group characteristics and their ability to adsorb ions. The objective of this study was to identify the functional groups of biochar at various pyrolysis temperatures and to determine the optimal temperature for enhancing the soil's ion adsorption capacity. The methods employed included functional group characterization using FTIR and ion adsorption testing using gentian violet and eosin red dyes. The results showed that biochar at 300°C retained dominant hydroxyl (-OH) and carbonyl (C=O) functional groups. Biochar at 500°C exhibited increased aromatic structure with dominant aromatic C=C groups while still retaining hydroxyl groups. Biochar at a pyrolysis temperature of 700°C loses many functional groups and is dominated by aromatic carbon. The best ion adsorption capacity is found in biochar at 500°C, followed by biochar at 700°C, and finally biochar at 300°C. Keywords: Analysis, organic materials, adsorption, ion. Keywords: Analysis, Organic Matter, Adsorption, Ion
Ability of Sandy Soil to Retain Water in Various Coastal Sand Land Management Practices in Bugel Village, Kulon Progo Regency: Kemampuan Lahan Pasir Menahan Air pada Berbagai Praktik Pengelolaan Lahan di Desa Bugel Kabupaten Kulon Progo Tri Nursasomo, Muhammad; Nurcholis, Mohammad
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15262

Abstract

The reduction of agricultural land due to land conversion has compelled farmers to explore alternative cultivation areas such as coastal sandy soils, despite their limited water retention capacity. Agricultural land in Bugel Village, Kulon Progo Regency, is predominantly composed of sand and exhibits various land management practices. This study aims to analyze the influence of land management strategies on the water retention capacity of coastal sand soils and to identify related soil properties. Soil samples were collected through purposive sampling based on land use maps and direct observation, resulting in three sampling locations that represent different land management practices. Descriptive statistical methods were employed, and the data were analyzed using Analysis of Variance (ANOVA) followed by the Duncan Multiple Range Test (DMRT). The results showed a significant difference in permanent wilting point moisture content (P < 0.01), available moisture content (P < 0.05), and air-dried moisture content (P < 0.05). These findings underscore the importance of appropriate land management in enhancing the water-holding capacity of coastal sandy soils.
Soil Quality Along a Distances Gradient from Shorelines in Samas Coastal Sandy Land, Bantul, Yogyakarta: Kualitas Tanah pada Jarak Garis Pantai di Lahan Pertanian Pasir Pantai Samas, Bantul, Yogyakarta Sepia Intan Cahyani Putri, Theresia; Herlambang, Susila
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15272

Abstract

Samas coastal sandy land is characterized as a marginal agricultural area, approximately 4 km from the shoreline. This study was conducted with three primary objectives: to evaluate its soil characteristics, to calculate its soil quality index (SQI), and to examine the limiting factors for soil quality. This study used a purposive survey method, sampling points were selected at varying distances from the coastline. Soil quality parameters analyzed included root density, weight density, porosity, clay content, C-organic, total N, available N/P/K, pH, and microbial counts (CFU/g). Soil quality was evaluated based on the criteria by Mausbach & Seybold (1998) and scoring function from Karlen et al. (1996), both of which were adapted to local conditions. The results showed that the 1 km from the coastline had the highest sand content (62.041%) but the lowest microbial counts (670×10³ CFU/g), while soils 4 km inland showed the lowest sand content (19.819%) and highest C-organic (1.297%), total N (0.392%), C/N ratio (3.309), and microbial activity (1910×10³ CFU/g). Available N, P, and K were consistently high across all sites. The soil quality index (SQI) increased with distance from the coast, transitioning from "moderate" (SQI 0.472 at 1 km) to "good" (SQI 0.774 at 4 km). The limiting factors identified were porosity, non-capillary porosity (NPD), C-organic, and available N. These findings underscore the critical role of shoreline proximity in shaping soil quality gradients in Samas’ sandy coastal agroecosystems.

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