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Stay on trails: Detrimental effects of recreational activities on soil compaction and infiltration Saputra, Danny Dwi; Putra, Aditya Nugraha; Sari, Rika Ratna; Ishaq, Rizki Maulana; Hadiwijoyo, Erekso; Hadi, Maruf; Suprayogo, Didik
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6213

Bromo Tengger Semeru National Park (BTS-NP) in East Java, Indonesia showcases a breathtaking volcanic landscape and cultural allure, drawing hundreds of thousands of domestic and international visitors. Recreational activities involving human and animal trampling and motorized-vehicle traffic caused soil disturbance along their networks of paths, trails, or roads, potentially having a detrimental long-term effect on the tourism industry and environmental services provided by the national parks. However, the extent of the impact of these disturbances on soil properties remains unclear. This study assessed the impact of different disturbance intensities, consisting of undisturbed locations as a control (zone 1), low to medium- (zone 2), and high- (zone 3) disturbance intensities on five different BTS-NP tourism hotspots, including Entrance Wonokitri (EW), Whispering Sand (WS), Parking Temple (PT), Teletubbies Hill (TH), and Entrance Bromo Stairs (EB), on soil properties, including soil compaction represented by soil penetration resistance, and soil infiltration. This study revealed that the higher severity impact of recreational activities on soil compaction was parallel with higher disturbance intensity, particularly in EW and TH. In these particular locations, higher soil compaction is significantly linked to lower soil infiltration, thus needing extra attention and protection. Meanwhile, in WS, PT, and EB, soil infiltration was more controlled by the establishment of a cemented topsoil layer consisting of mixed sand, sulfur, and water. Better management strategies, such as the use of proper trails and road infrastructures, particularly on EW and TH, might be relevant to minimize the impact of recreational activities on these ecologically, economically, and culturally important areas.

Optimizing coffee yields in agroforestry systems using WaNuLCAS model: A case study in Malang, Indonesia Fitra, Ahmad Ali Yuddin; Oakley, Simon; Prayogo, Cahyo; Ratna Sari, Rika; Saputra, Danny Dwi; Ishaq, Rizqi Maulana; Suprayogo, Didik
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6337

Agroforestry systems have significant potential for development in increasing coffee production in Indonesia. Besides providing economic benefits, agroforestry can also have ecological impacts, such as improving soil structure, reducing erosion, and other environmental services. There is a complex interaction between trees, soil, and crops in agroforestry systems, making modeling a valuable approach to unraveling these processes. We utilized the spatial and temporal explicit model WaNuLCAS to (i) evaluate the model's performance in depicting actual events (through coffee production and soil water content), (ii) assess the dynamic processes influencing coffee production and the environmental impact of management patterns, (iii) formulate and simulate optimal scenarios for coffee production optimization. Data from a one-year period involving five agroforestry management patterns for coffee-pine in UB Forest were used as input for the model. The model validation results showed satisfactory and acceptable outcomes for coffee production and groundwater dynamics. WaNuLCAS simulation results indicated that pruning and thinning management are crucial factors in increasing coffee production and are related to creating optimal conditions for coffee plants (light, humidity, and inter-plant competition). Additionally, fertilization management can be combined as a supporting factor to meet the nutritional needs of coffee plants. WaNuLCAS simulation results also suggested that pruning and thinning can improve soil physical properties, but thinning increases surface runoff within the system. This research provides insights into how modeling can be used as a decision-making tool.

The Effect of Coffee Canopy Pruning and Fertilization on Coffee Growth and Soil Physical Properties Rosesita Tri Suci Rohani; Cahyo Prayogo; Didik Suprayogo; Kurniawan Sigit Wicaksono
Journal of Applied Agricultural Science and Technology Vol. 8 No. 1 (2024): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v8i1.208

Arabica coffee is primarily cultivated in agroforestry systems in Indonesia, but limited local knowledge and technology adoption hinder its productivity due to insufficient practices in coffee pruning management. This study aims to analyze variations in coffee canopy pruning (Pruning+Bending) management and the impact on plant growth and soil physical characteristics.. The experiment employed a split-plot experimental design and utilized the Fisher test (5%) to assess the treatment effects. The primary plot focused on coffee canopy pruning using two management options: (1) Pruning (PR) and (2) Bending (BN). The subplots included various types and doses of fertilizer treatments: (1) Control (F0), (2) Chicken manure (F1), (3) Chicken manure+NPK fertilizer (F2), and (4) NPK fertilizer (F3). Each experimental plot covered an area of 20x20 m and contained 50 coffee plants. Bending techniques represent alternative pruning methods, and, in general, they have a significant impact on improving several coffee parameters compared to total pruning. Regarding the soil’s physical properties, the bending technique exhibited a higher infiltration rate than pruning. The management approach of Bending+Chicken manure: NPK fertilizer (BNF2) enhanced various coffee parameters, resulting in an increased stem diameter of 4.79 cm, new shoot length of 471.20 cm, and chlorophyll content of 6.83 mg/g. Furthermore, this treatment increased soil organic carbon content by 7.51% and reduced bulk density to 0.58 g/cm. In conclusion, the bending technique wasproven to be more advantageous than pruning, especially when combined with chicken manure and NPK fertilizer for enhancing coffee management among farmers.

PENGARUH APLIKASI BIOGEOTEKSTIL DAN PROBIOTIK TERHADAP RESPIRASI TANAH DAN BIOMASSA MIKROBA DALAM BUDIDAYA KENTANG DI ANDISOL Fajriyah, Azizatul; Utami, Sri Rahayu; Maulidiyah, Nurul; Permatasari, Wulan; Yu-Min, Wang; Suprayogo, Didik
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 1 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.1.19

Soil respiration and microbial biomass are key biological indicators for soil fertility, especially in the context of agricultural sustainability. Potatoes (Solanum tuberosum L.) are a high-demand crop; their cropping system often ignores conservation principles, causing land degradation. Applying biogeotextiles and probiotics might be potential solution to reduce erosion and maintain soil fertility. This study aimed to evaluate the impact of biogeotextile and probiotic applications on soil respiration and microbial biomass as indicators of soil health in potato farming in Andisols. Randomized Block Design Factorial was used with biogeotextile application as the first factor and and probiotic as the second factor. Four treatments were applied, i.e., control (no treatment), biogeotextile, probiotic, and a combination of biogeotextile and probiotic. Soil pH, % organic C, % N-total, and soil microbial Carbon were measured in 0, 40, and 80 days after treatment (dat), while soil respiration were observed every week. The results showed that the application of biogeotextiles and probiotics had no significant effect on soil pH, soil organic C, and soil N-Total. Microbial biomass remained stable until 80 dat, however, it tended to increase in the final growth phase, irrespective to the effect of biogeotextile and probiotic applications. Soil respiration showed a fluctuating pattern, with a significant increase on 35 and 42 day after planting. This study emphasizes the need for long-term observations to further understand the impact of biogeotextile and probiotic applications on soil biochemical properties in Andisols.

PENGARUH APLIKASI BIOGEOTEKSTIL DAN PROBIOTIK TERHADAP RESPIRASI TANAH DAN BIOMASSA MIKROBA DALAM BUDIDAYA KENTANG DI ANDISOL Fajriyah, Azizatul; Utami, Sri Rahayu; Maulidiyah, Nurul; Permatasari, Wulan; Yu-Min, Wang; Suprayogo, Didik
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 1 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.1.19

Soil respiration and microbial biomass are key biological indicators for soil fertility, especially in the context of agricultural sustainability. Potatoes (Solanum tuberosum L.) are a high-demand crop; their cropping system often ignores conservation principles, causing land degradation. Applying biogeotextiles and probiotics might be potential solution to reduce erosion and maintain soil fertility. This study aimed to evaluate the impact of biogeotextile and probiotic applications on soil respiration and microbial biomass as indicators of soil health in potato farming in Andisols. Randomized Block Design Factorial was used with biogeotextile application as the first factor and and probiotic as the second factor. Four treatments were applied, i.e., control (no treatment), biogeotextile, probiotic, and a combination of biogeotextile and probiotic. Soil pH, % organic C, % N-total, and soil microbial Carbon were measured in 0, 40, and 80 days after treatment (dat), while soil respiration were observed every week. The results showed that the application of biogeotextiles and probiotics had no significant effect on soil pH, soil organic C, and soil N-Total. Microbial biomass remained stable until 80 dat, however, it tended to increase in the final growth phase, irrespective to the effect of biogeotextile and probiotic applications. Soil respiration showed a fluctuating pattern, with a significant increase on 35 and 42 day after planting. This study emphasizes the need for long-term observations to further understand the impact of biogeotextile and probiotic applications on soil biochemical properties in Andisols.

Impact of Management Practices on Coffee-Pine Agroforestry: Coffee Yield and Soil Respiration Eka Novia Rosalynda; Cahyo Prayogo; Didik Suprayogo
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 1 (2025): February 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i1.155-170

The coffee-pine agroforestry system offers a promising solution to enhance coffee yields and maintain soil health on degraded lands. This study aims to evaluate the impact of various agroforestry management practices on coffee yield and soil respiration. The experiment was conducted using a complete randomized block design across five management treatments: without management, without fertilization, organic fertilization, mixed fertilization, and recommended management by Perhutani. The observed parameters included coffee yield, soil respiration, soil moisture, soil temperature, litter biomass, canopy cover, and soil organic carbon (SOC) content. Results indicated that the recommended management (RM) plot achieved the highest coffee yield (834 kg ha⁻¹), attributed to wider planting spacing, which reduced resource competition between coffee and pine trees. The RM plot also displayed stable soil moisture and temperature, supporting coffee growth. Meanwhile, soil respiration showed no significant differences across treatments, though the mixed fertilization (MF) plot exhibited the highest respiration rate, indicating higher microbial activity due to combined fertilizer use. In conclusion, optimal management in agroforestry systems can enhance coffee productivity while preserving soil health. Keywords: Agroforestry, Coffee Yield, Soil Management, Soil Moisture, Soil Respiration.

Enhancing Coffee Productivity and Carbon Stock in Agroforestry Systems Using the WaNuLCAS Model under Climate Change Nurwarsito, Heru; Suprayogo, Didik; Prayogo, Cahyo; Fitra, Ahmad Ali Yuddin
AGRIVITA Journal of Agricultural Science Vol 47, No 3 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i3.4935

The coffee-pine agroforestry model, where coffee is grown under shade trees, provides environmental benefits such as carbon sequestration and soil health improvement. However, maintaining carbon stocks over time is challenging due to climate change, which alters water and nutrient availability. Using the WaNuLCAS model, this study assessed system optimization under various climate scenarios, focusing on coffee yield, carbon stock, and biomass balance. The model simulates water and nitrogen cycling as well as coffee–pine interactions. The results showed that an increase in rainy season enhanced coffee growth, while applying Best Management Practice (BMP) led to a 44.64% higher coffee yield and a 4.52% increase in biomass production compared with the control. Conversely, low coffee (LC) with poor management increased carbon stock by 6.91% and biomass by 26.74%, the largest differences observed between treatments. This highlights trade-offs in land use performance. Previous studies mainly emphasized agroforestry’s contributions to carbon sequestration, biodiversity, and timber, with limited quantification of trade-offs between yield, carbon, and biomass under varying rainfall. By integrating site-specific calibration of the WaNuLCAS model, this study offers a novel approach showing how contrasting strategies (BMP vs. LC) differently optimize productivity and ecological services, guiding climate-resilient coffee agroforestry.

Oil palm frond decomposition and soil carbon stocks in response to fertilization regime and management zones Wandri, Ruli; Hairiah, Kurniatun; Suprayogo, Didik; van Noordwijk, Meine; Asmono, Dwi
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.9011

Oil palm plantations face sustainability challenges with variable yields and significant greenhouse gas emissions. To optimize nutrient cycling while maintaining soil carbon stocks, this study investigated the effects of fertilization intensity and spatial management on organic matter decomposition. A factorial experiment in South Sumatra (Indonesia) used a completely randomized block design with three fertilization levels (low, intermediate, high). Decomposition was monitored in three spatial zones (weeded circle, frond stack, interrow) using litter bags over 52 weeks, with sequential harvesting at 13 time points. Soil properties, litter quality, and environmental factors were analyzed using ANOVA and regression models. Results showed decomposition constants ranging from 0.0180 to 0.0258 week?¹ and half-life times of 16 to 32 weeks, with high fertilization treatments accelerating decomposition by 28% but reducing soil carbon (2.05% to 2.77%) below the litter bags compared to low fertilization (4.37%). Frond stack zones exhibited 35% faster decomposition while maintaining higher carbon levels. The regression model combining soil and frond C/N ratios explained 73% of the variance in decomposition. These findings reveal trade-offs between rapid nutrient cycling and carbon storage, demonstrating that sustainable oil palm production requires precision spatial management rather than uniform high fertilization. This study recommends implementing reduced-intensity inorganic fertilization, avoiding nutrient application in frond stacking zones, and expanding organic matter placement in inter-row areas. Future research should prioritize quantifying belowground carbon dynamics and fine root turnover to develop management frameworks balancing immediate productivity with long-term sustainability.

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