Open research questions in Soil Carbon and Nitrogen Dynamics
396 unresolved questions extracted from the limitations and future-work sections of 1,321 Soil Carbon and Nitrogen Dynamics papers in our library. Each links back to the study that raised it.
What the literature leaves open
The study only examined the early stages of post-fire recovery, - Longer-term monitoring is needed to understand the full recovery process, - The study did not evaluate the ecological contribution of non-core and rare microbial taxa, - The findings may not persist through later successional stages
Fire effects on soil microbial community dynamics and associated soil physicochemical properties in two subtropical forest types · 2026 · DOILong-term monitoring to understand the full recovery process, - Evaluating the ecological contribution of non-core and rare microbial taxa, - Investigating the mechanisms underlying forest type-dependent responses
Fire effects on soil microbial community dynamics and associated soil physicochemical properties in two subtropical forest types · 2026 · DOIThe effects of seasonal nitrogen management on soil microbial communities and crop productivity are not well understood. The regulatory mechanisms of nitrogen fertilizer legacy on soil-crop coordination and microbial functions remain unclear. There is a need for a scientific basis for precise fertilization regulation in rotation systems.
Season-specific nitrogen management shapes soil microbial communities and crop productivity in wheat–maize rotation system · 2026 · DOIThe study has several limitations, including the cross-sectional observational design, unequal sampling representation among land-use categories, and the lack of detailed information on management history and site-specific drivers. The packing-density equations and thresholds were developed mainly from temperate soils and have not been locally calibrated against direct functional measurements in tropical Colombian soils.
Integrating Soil Compactness, Carbon Stocks, and Pieri-Index-Based Structural Vulnerability for Soil Quality Assessment Across Tropical Land-Use Systems · 2026 · DOIFurther research is needed to understand the relationships between microbial diversity and SEF trade-offs. The study of SEFs and their trade-offs in other ecosystems is necessary. Investigation of the effects of anthropogenic disturbance on SEFs and their trade-offs is required.
Spatial patterns of soil multifunctionality trade-offs and their relationships with microbial diversity in warm-temperate mountain forests of North China · 2026 · DOIOne challenge is the lack of direct spatial validation of the effects of nitrification inhibitors on ammonium-nitrate partitioning and microbial processes. Another challenge is the need to quantify the appropriate state variables within the wetted bulb and relate them to in-soil process rates. The paper also identifies the challenge of making the idea of drip-NIs integration practical and deployable.
Integrating drip fertigation and nitrification inhibitors for rhizosphere-scale control of nitrogen transformations · 2026 · DOIdirect measurements of denitrification and nitrification hotspots within the wetted bulb remain limited, - most drip-NIs trials still rely on bulk soil sampling and end-of-season balances, - the predictability of microbial hotspots within the wetted bulb should be considered a testable hypothesis
Integrating drip fertigation and nitrification inhibitors for rhizosphere-scale control of nitrogen transformations · 2026 · DOIInvestigate the effects of different soil physicochemical properties and rhizosphere microbial communities on strawberry crop performance in various regions, - Examine the long-term effects of soil physicochemical properties and rhizosphere microbial communities on strawberry crop performance, - Explore the potential applications of manipulating rhizosphere microbial communities to improve strawberry fruit quality
Spatial associations among soil physicochemical properties, rhizosphere microbiota, leaf mineral status, agronomic traits, and fruit quality of white strawberry in acidic soils · 2026 · DOIThe paper identifies technical challenges, such as the slow rate of hydrocarbon dissipation in phytoremediation. It highlights domain challenges, such as the need for low-cost biological remediation strategies for petroleum-contaminated soil.
Asymmetric Roles of Ryegrass and Earthworms in Shaping Microbial Community Composition and Nutrient-Acquiring Enzyme Activities in Petroleum-Contaminated Soil · 2026 · DOIInvestigate the effects of different plant and earthworm species on microbial community composition, - Examine the long-term effects of ryegrass and earthworms on hydrocarbon removal, - Study the mechanisms by which ryegrass and earthworms interact with microbial communities
Asymmetric Roles of Ryegrass and Earthworms in Shaping Microbial Community Composition and Nutrient-Acquiring Enzyme Activities in Petroleum-Contaminated Soil · 2026 · DOIIntegrate multi-omics with process-based measurements and long-term field experiments. Develop locally adapted microbial consortia with monitoring of non-target effects. Strengthen risk assessment and governance frameworks to enable safe, scalable microbiome-informed grassland restoration under global change.
From microbiome collapse to recovery: a roadmap for microbiome-informed grassland restoration under global change · 2026 · DOIInvestigate the specific mechanisms by which nitrogen deposition affects microbial resource-acquisition strategies and extracellular enzyme investment. Explore how different soil properties influence the persistence of soil carbon under varying levels of nitrogen deposition.
From nitrogen enrichment to ecosystem recovery: mechanisms driving forest ecosystem reorganization under changing nitrogen regimes · 2026 · DOIIdentifies the need to understand how nitrogen enrichment affects carbon-nitrogen coupling and ecosystem functioning. Highlights the complexity of soil carbon persistence under varying nitrogen regimes.
From nitrogen enrichment to ecosystem recovery: mechanisms driving forest ecosystem reorganization under changing nitrogen regimes · 2026 · DOIthe impacts of global environmental changes and intensive agricultural practices on the diversity of microorganisms remain a critical gap in the literature, - the complexity of soil environments gives rise to a vast diversity of soil microorganisms, - functional redundancy complicates our understanding of the specific contributions of individual species to soil health and plant growth
research should aim to disentangle the contributions of different microbial species to key soil functions, - addressing the challenges in fully understanding and harnessing soil microbial diversity requires a multidisciplinary approach, - understanding the balance between redundancy and functional specialization is crucial for predicting how microbial communities will respond to changes in agricultural practices or environmental conditions
The mechanisms by which biochar reduces saline-alkali stress are not fully understood. There is a lack of research on the impact of biochar on soil bacterial communities in highly saline-alkali paddy fields. The effects of biochar application on soil chemical characteristics and nutrient availability in saline-alkali soils are not well studied.
Biochar Application Reduces Saline–Alkali Stress by Improving Soil Functions and Regulating the Diversity and Abundance of Soil Bacterial Community in Highly Saline–Alkali Paddy Field · 2024 · DOIThe paper identifies the challenge of maintaining adequate efficiency while fully protecting the environment, especially in developing countries. It also mentions the challenge of soil erosion and the need to reduce fertilizer use. Another challenge is the lack of a single, universal, and precise source of information about soil and crops.
potential yield loss under certain conditions may discourage farmers from conservation tillage practice - certain beneficial microbes can lead to a decrease in microbial diversity - limited effectiveness in diverse agricultural settings - there is no single, universal, and precise source of information about soil and crops
the study focuses on a limited number of SOM components, - the experiments were conducted with a specific set of minerals, - the study does not account for other factors that may influence mineral-SOM interactions
investigating the synergetic and competitive interactions between soil minerals and the diverse biochemical classes of SOM, - unraveling the interactions between soil minerals and SOM components, - studying the effects of other factors on mineral-SOM interactions
Further research is needed to quantitatively disentangle the contributions of different stressors to crop damage. Studies should investigate the effects of soil acidification on other crops and ecosystems. Research should focus on developing ecological management and mitigation strategies for acidified soils.
Soil acidification drives a massive accumulation of nitrite as a mechanistic bottleneck to inhibit maize growth and productivity · 2026 · DOIThe relationships between soil physicochemical properties, rhizosphere microbiota, leaf mineral status, agronomic traits, and fruit quality of white strawberry in acidic soils are poorly understood. There is a lack of systematic characterization of these relationships in strawberry cultivation sites.
Spatial associations among soil physicochemical properties, rhizosphere microbiota, leaf mineral status, agronomic traits, and fruit quality of white strawberry in acidic soils · 2026 · DOIThe relationship between microbial community attributes and soil multifunctionality remains poorly understood. Prior work has focused on univariate diversity metrics, neglecting the importance of network complexity. There is a need to examine the cooperative associations among taxa that underpin multiple soil functions.
Microbial Network Complexity Emerges as a Key Predictor of Soil Multifunctionality Across Alfalfa Fields of Different Planting Years · 2026 · DOIThe effect of shrub size and soil depth on the fertile island effect in semiarid grasslands is not well understood. Prior work has not examined how shrub size and soil depth jointly regulate soil organic carbon, total nitrogen, and total phosphorus beneath the leguminous shrub Caragana microphylla.
Shrub size and soil depth shape fertile island effects in Caragana microphylla encroached semiarid grasslands · 2026 · DOISoil degradation alters the effectiveness of agricultural management practices, yet how it reshapes the pathways linking management to soil quality remains poorly understood.
Degradation-dependent shifts in pathways linking straw incorporation and cover crops to soil quality in Mollisols · 2026 · DOI
Most-cited papers in Soil Carbon and Nitrogen Dynamics
- Soil Carbon Sequestration Impacts on Global Climate Change and Food Security · Science · 2004 · 6,886 citations
- Temperature sensitivity of soil carbon decomposition and feedbacks to climate change · Nature · 2006 · 5,599 citations
- Persistence of soil organic matter as an ecosystem property · Nature · 2011 · 5,474 citations
- The contentious nature of soil organic matter · Nature · 2015 · 4,044 citations
- Significant Acidification in Major Chinese Croplands · Science · 2010 · 3,589 citations
- Progressive Nitrogen Limitation of Ecosystem Responses to Rising Atmospheric Carbon Dioxide · BioScience · 2004 · 1,133 citations
- Life and death in the soil microbiome: how ecological processes influence biogeochemistry · Nature Reviews Microbiology · 2022 · 1,052 citations
- Soil health and carbon management · Food and Energy Security · 2016 · 876 citations
- Soil microbiota as game-changers in restoration of degraded lands · Science · 2022 · 674 citations
- A global soil data set for earth system modeling · Journal of Advances in Modeling Earth Systems · 2014 · 648 citations
Most recent work
- Sustainable farming systems integrating soil health water use efficiency and crop productivity for climate resilience · Discover Sustainability · 2026
- From microbiome collapse to recovery: a roadmap for microbiome-informed grassland restoration under global change · Frontiers in Microbiology · 2026
- Mechanisms and sources of organic carbon accrual in deep soil under long-term straw return · Soil and Tillage Research · 2026
- Rhizosphere microbial functions drive ecological stoichiometry in soils across an elevational gradient of a temperate mountain ecosystem · Communications Biology · 2026
- Global environmental changes threaten the feeding activity of soil detritivores · Current Biology · 2026
- Never say never: The interdependence of no-till and strategic deep tillage in sustainable production systems · Crop and Environment · 2026
- Synergistic optimization of plastic film mulching and nitrogen management and water-soil-greenhouse gas coupling mechanism on the Loess Plateau · Soil and Tillage Research · 2026
- Biochar-based fertilizer mitigates paddy soil N2O emissions by shifting nitrifier-denitrifier functional gene balance and enhancing recovery efficiency of nitrogen · Soil and Tillage Research · 2026
- Anthropogenic soil acidification severely decreases microbial diversity and functionality · Current Biology · 2026
- Fertilizer-N recovery links to SOC stabilization and fractionation in straw-mulched soil: Insights from 15N-tracing and 13C natural abundance · Journal of Integrative Agriculture · 2026
Find a gap in your own Soil Carbon and Nitrogen Dynamics sub-topic
This page shows what the Soil Carbon and Nitrogen Dynamics literature already flags as unresolved. To narrow it to your specific question, run the guided finder — it searches the gap library on demand and checks candidates against 250M+ OpenAlex works.
Open the Research Gap Finder →