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All Journal TERRA : Journal of Land Restoration Gunung Djati Conference Series
M. Faiz Barchia
University of Bengkulu
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Relationship Analysis of Soil Bulk Density, Available K, and Slope to Productivity of Salak Pondoh at Padang Jaya, North Bengkulu Muhammad Yakub; M. Faiz Barchia; Usman K.J. Suharjo
TERRA : Journal of Land Restoration Vol 3, No 2 (2020)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.3.2.51-55

Abstract

Salak (Zalacca edulis Gaertn. Voss) is one of the most populair native fruits of Indonesia, consumed as a table fruit by most Indonesians. However, the yield of salak pondoh grown in Bengkulu is still lower than that in their native soil Java, believed to have more suitable soil properties for growing salak pondoh. The objective of this research were to evaluate the relationship of soil bulk density, available K, and slope to the productivity of salak pondoh grown at Padang Jaya Regency, North Bengkulu. We did a survey to collect data on soil bulk density (BD), available K (K), and slope as well as the productivity of salak pondoh grown at Padang Jaya from November 2017 to May 2017. The results showed that there was a significant relationship between soil characteristics and salak productivity, as shown in a linear model of Y = 2.929 -1.070 BD + 0.069 K - 0.126 Slope. Soil K was positively correlated to salak productivity, suggesting that salak productivity increased with an increase in soil K.  On the other than, soil bulk density and slope were negatively correlelated to salak productivity, indicating that salak productity decreased with an increase in slope and in soil bulk density.
Analysis of the Level of Erosion Hazard By Using Remote Sensing and Geographic Information System in the Sub-Watershed of Rindu Hati Prayogi Dhuha Brahmanto; Bambang Sulistyo; M. Faiz Barchia
TERRA : Journal of Land Restoration Vol 3, No 2 (2020)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.3.2.32-38

Abstract

Rindu Hati sub-watershed is located in District of Central Bengkulu, Bengkulu Province, that has flat until montainous topography with various slope and annual rainfall up to 4,032 mm year-1 which possible causes erosion. This research was aimed to analyze soil erosion at Rindu Hati sub-watershed based on the Universal Soil Loss Equation formula, using remote sensing imagery data and by applying GIS technique. USLE method were uses five parameters, those were length and slope factor, rainfall erosivity factor, crop management factor and land conservation , and soil erodibility factor. An overlay analysis has been conducted to obtain the erosion. Then, the result is overlaid with soil depth map to get the level of erosion hazard, which is classified into: very light, light, moderate, heavily, and very heavily. The results showed that the total erosion was 12,410,650.59 tons ha-1 year-1, while its level of erosion hazard were very light (15 tons ha-1 year-1) covering an area of 2,983 ha spreading over community agricultural areas and forest areas, the rate of light erosion (> 15-60 tons ha-1 year-1) has the largest area of covering an area of 10,410.05 ha which scattered in plantation areas having flat topography, moderate erosion rates (> 60-180 tons ha-1 year-1) of 1,317.33 ha spread over land areas with shrub land use and relatively flat topography, heavily erosion rates (> 180- 480 tons ha-1 year-1) covering 1,735.48 ha spread over land with shrub land use but has a hilly topography and very heavily erosion rates (> 480 tons ha-1 year-1) covering 2,700.42 ha located in the mining area. Erosion potential rate mapping will be very helpful in determining good and appropirate land management and conservation in the study area. 
Effect of Biourine on N Uptake and Cabbage (Brassica oleraceae L) Growth on Lowland Ultisol Amin Nur Rohman; M. Faiz Barchia; Bambang Gonggo Murcitro
TERRA : Journal of Land Restoration Vol 3, No 2 (2020)
Publisher : Department of Soil Science, Faculty of Agriculture, University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.3.2.39-44

Abstract

Research on the effect of doses of cattle biourine on plant N levels and growth of cabbage (Brassica oleraceae, L) in lowland Ultisol was carried out by Desa Bakti in Marga Sakti Sebelat District, North Bengkulu Regency in October 2019 to January 2020. This study aimed to determine the dosage of cattle biourine optimal for N levels and cabbage growth in lowland ultisols. This study used a Randomized Complete Block Design (RCBD) of one factor consisting of 4 treatments and 4 replications, with the treatment dose 0 L ha-1, 1500 L ha-1, 3000 L ha-1, and 4500 L ha-1. Observation data were analyzed by Analysis of variance (ANOVA) at ? level of 5% with the Orthogonal Polynomial Test. The results of the study showed that the optimum dosage was not obtained on the variable N levels of plants and soil pH, but had a very significant effect on both of these variables. The optimum dosage obtained on the variable growth and yield of plants includes the optimum dose of 2250 L ha-1 biourine producing an average plant height of 36.14 cm age 45 dap, the optimum dose of 2200 L ha-1 of biourine produces an average plant height of 37.87 cm age 60 dap, optimum dose of biourine 1250 L ha-1 produces an average biomass fresh weigh 1.33 kg, the optimum dose of biourine 1666.67 L ha-1 produces an average head weight of 0.83 kg, and optimum dose of biourine 2000 L ha-1 produces average head diameter of 15.36 cm.   
NITROGEN MINERALIZATION RATE IN COMBINED APPLICATION OF ORGANIC AND INORGANIC NITROGEN FERTILIZERS ON INCEPTISOL’S BENGKULU Kartika Utami; Hepyliani Marsanda; Sukisno; M. Faiz Barchia; H. Gusmara
Gunung Djati Conference Series Vol. 66 (2026): The International Conference on Perennial Crops 2026
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/gdcs.v66i.3419

Abstract

Inceptisol is characterized by poor soil chemical properties, particularly a deficiency of nitrogen (N), one of the essential macronutrients required by plants in large amounts but typically present in soil at low availability. This study aimed to determine the rate of N mineralization resulting from the combined application of ZA fertilizer (21% N) and cow manure on Inceptisol soil from Bengkulu. The experiment was conducted from November 2023 to March 2024 at the Soil Science Laboratory, Faculty of Agriculture, University of Bengkulu, using a single-factor Completely Randomized Design (CRD) with four treatments: 100% ZA fertilizer (400 kg ha⁻¹), 50% ZA + 50% organic fertilizer, 30% ZA + 70% organic fertilizer, and 100% organic fertilizer (25,000 kg cow manure ha⁻¹), each replicated three times across five incubation intervals (7, 14, 28, 42, and 70 days after incubation/DAI), producing 60 experimental units. Ammonium (NH4⁺) and nitrate (NO3⁻) concentrations were measured periodically, and the mineralization rate was calculated using a first-order kinetic model. The results showed that the combination of 50% ZA and 50% organic fertilizer produced the highest NO3⁻ mineralization rate (2.37 ppm day⁻¹), while 100% organic fertilizer produced the highest NH4⁺ mineralization rate (0.93 ppm day⁻¹). Sole application of ZA fertilizer resulted in a negative NH4⁺ mineralization rate (-2.96 ppm day⁻¹), indicating rapid conversion of NH4⁺ into NO3⁻ through nitrification. These findings suggest that the combination of inorganic and organic N fertilizers provides a more sustained and balanced N mineralization pattern than either fertilizer applied alone, offering a practical strategy for improving N availability in Inceptisol soils.
Co-Authors Amin Nur Rohman Bambang Gonggo Murcitro Bambang Sulistyo H. Gusmara Hepyliani Marsanda Kartika Utami Muhammad Yakub Prayogi Dhuha Brahmanto Sukisno Usman K.J. Suharjo