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All Journal SAINS TANAH - Journal of Soil Science and Agroclimatology
Uddin, Md Kamal
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The multifunctional role of Pseudomonas spp. as plant growth-promoting rhizobacteria (PGPR): A sustainable approach to biofertilization and plant health Reza, Shah Ahmed; Han, Mingzhao; Uddin, Md Kamal; Kasim, Susilawati Binti; Kee Zuan, Ali Tan; Anwar, Farooq; Raguraj, Sriharan
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 23, No 1 (2026): June (in Progress)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v23i1.92634

Abstract

Sustainable agriculture relies on maintaining healthy, ecologically balanced soil. The excessive use of chemical fertilizers has resulted in declining soil fertility, biodiversity loss, and structural degradation. In particular, the use of biofertilizers containing microbial inoculants that enhance plant growth and soil health offers a promising alternative by improving nutrient availability, suppressing pathogens, and restoring soil ecosystems. Studies have shown that rhizosphere microbes can enhance plant growth and control diseases by producing phytohormones and aiding nutrient uptake. Many bacterial genera can be used as biofertilizers, including nitrogen-fixers, phosphorus-solubilizers, potassium-solubilizers (K-solubilizers), and others. Among the diverse plant growth-promoting rhizobacteria (PGPR), species within the Pseudomonas genus have emerged as promising candidates due to their exceptional versatility and resilience. Pseudomonas spp. exhibits a wide array of plant growth-promoting traits, including atmospheric nitrogen fixation, solubilization of phosphorus and potassium, and the secretion of phytohormones such as indole-3-acetic acid (IAA) and gluconic acid. By systematically linking their metabolic traits to specific soil health and crop productivity outcomes, this review provides new insights into their potential application in sustainable and climate-resilient agriculture. Several Pseudomonas species have been extensively utilized as biofertilizers due to their multifunctional traits, adaptability to a wide range of soil environments, and capacity to enhance plant health under both biotic and abiotic stress conditions. The primary objective of this review is to present a comprehensive overview of biofertilizer mechanisms and the functional roles of Pseudomonas spp., including selected strains known to improve plant growth and soil fertility.
Rubber plantations in tropical landscapes: agronomic systems, environmental impacts, and evidence-based management recommendations Mohammed Hashim Ali, Fadeila; Zaibon, Syaharudin bin; Uddin, Md Kamal; Abubakar, Ahmed; Haque, Shamsul
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.v22i2.101146

Abstract

While Natural Rubber (NR) supports global supply chains, rapid expansion in South and Southeast Asia has noticeable effects on biodiversity, hydrology, and the carbon balance. This review synthesises the economic importance, environmental challenges, commercial applications, and ecological impacts of rubber production and plantation expansion. Furthermore, the study combines high-resolution deforestation attribution (Sentinel-2/Landsat), Eddy-Covariance (EC) comparisons of plantations and nearby tropical forests, and models that include a rubber-specific Plant Functional Type (PFT). In addition, conversion from forest to rubber consistently simplifies habitats, decreases species richness and functional diversity, reduces ecosystem carbon storage, raises peak flows and sediment export, and lowers baseflow. Conversely, replacing annual cropland can increase above-ground biomass and provide partial carbon gains. As such, results depend systematically on prior land use, monsoon intensity and rainfall patterns, elevation, and management practices (monoculture versus diversified agroforestry). The study recommends directing new planting onto already cleared land through spatial planning and reliable traceability; adopting diversified rubber agroforestry and soil- and water-conserving methods. This includes explicitly integrating rubber within zero-deforestation policies and results-based carbon payments. In line with this, rubber-specific modelling and open flux datasets should support climate-risk assessments and monitoring. Overall, focused governance and agroforestry strategies can balance ecological trade-offs while maintaining production, aligning natural-rubber supply with verifiable climate and biodiversity safeguards.
Co-Authors Abubakar, Ahmed Anwar, Farooq Han, Mingzhao Haque, Shamsul Kasim, Susilawati Binti Kee Zuan, Ali Tan Mohammed Hashim Ali, Fadeila Raguraj, Sriharan Reza, Shah Ahmed Zaibon, Syaharudin bin