An original scientometric analysis published in the Journal of Soil Science and Plant Nutrition by lead author Gthielly Maira Fernandes and a collaborative team of international researchers maps the global academic evolution of biochar inside plant growing media. Spanning a fourteen-year investigative period, the peer-reviewed manuscript quantifies publication trends, country-level productivity, institutional networks, and thematic clusters to chart how the material has transitioned from a specialized soil amendmentA soil amendment is any material added to the soil to enhance its physical or chemical properties, improving its suitability for plant growth. Biochar is considered a soil amendment as it can improve soil structure, water retention, nutrient availability, and microbial activity.   More into a mainstream pillar of modern horticulture. By processing nearly one thousand distinct publications indexed within the Web of Science core collection, the authors deliver a comprehensive evaluation of academic knowledge distribution. Their findings confirm that the global trajectory of biochar research has reached a state of operational maturity, heavily driven by international anxieties regarding peat extraction and the overarching commercial push toward climate-smart agricultural inputs.

The empirical data gathered by the research team showcases a profound surge in scholarly interest, tracking an exponential growth pattern that intensified significantly during the latter half of the study period. Between the years of 2011 and 2015, the scientific literature remained in a primary exploratory phase where investigators focused broadly on baseline material characterization and elementary soil fertility impacts. A distinct structural shift occurred after 2018, as investigations expanded rapidly to examine environmental emissions mitigation, growing media structural physics, and the complex biological dynamics occurring within subterranean microbial communities. This momentum culminated in a period of sustained linear growth, maintaining an exceptional statistical correlation coefficient from 2020 through 2024. The global output crested with an unprecedented peak of 169 publications during the 2024 calendar year, a milestone that underscores the ongoing prioritization of biochar systems within environmental engineering and agronomic research sectors.

Geographically, the publication metrics reveal an intense concentration of scientific influence and volume within a select group of manufacturing nations, with Asian and North American interests anchoring the global network. China acts as the dominant force in both quantitative output and academic visibility, generating 297 primary articles and securing a massive footprint of 11,407 citations. The United States holds the second position internationally, contributing 122 published studies paired with 4,197 citations. Australia, Germany, and Spain round out the leading tier of nations, establishing strategic cooperation hubs that bridge multiple regional clusters and facilitate cross-border scientific alliances. On an institutional scale, the Chinese Academy of Sciences emerged as the most relevant single organization involved in the subject area, logging 28 distinct publications and collecting 1,097 citations. This major entity forms a tightly integrated research axis alongside domestic institutions like China Agricultural University and Beijing Forestry University, driving a substantial majority of the recorded global co-authorship interactions.

Thematic mapping within the study highlights a profound conceptual migration from raw chemical processing questions toward practical, circular-economy applications in commercial plant nurseries. Textual tracking indicates that the terms biochar, soil, compost, and growth represent the most frequent keywords utilized throughout the global database. These dominant nodes reinforce the operational reality that biochar acts as a high-performance substrate conditioner capable of enhancing root development and improving nutrient retention. Furthermore, the analysis emphasizes the material’s emerging viability as a direct commercial alternative to peat, a traditional substrate component under intense regulatory scrutiny due to the high carbon emissions and ecosystem degradation associated with its extraction. European countries have established clear policy targets to eliminate peat usage, which has forced the commercial horticulture sector to look toward porous pyrolytic materials to fill the structural supply void.

Despite the recorded research gains, the manuscript explicitly identifies several persistent baseline hurdles that prevent immediate, universal commercialization. The authors highlight that feedstockFeedstock refers to the raw organic material used to produce biochar. This can include a wide range of materials, such as wood chips, agricultural residues, and animal manure. More heterogeneity and inconsistent thermochemical processing conditions continue to generate high variability in the physical properties of the final product, which directly compromises the predictability of plant growth outcomes. To achieve widespread commercial adoption, the global biochar industry requires strict cross-border methodological standardization and longer-term validation trials conducted under practical nursery conditions. The data demonstrates that while low-to-moderate concentrations of biochar improve plug stability and crop performance, excessive blending ratios can inadvertently trigger nutrient immobilization or cause localized plant toxicity due to salt concentrations. Resolving these issues will require structured, cross-disciplinary integration among academic researchers, public policymakers, and industrial substrate manufacturers to ensure reliable performance across diverse agricultural markets.

Source: Fernandes, G. M., Admas, B. F., de Oliveira, E. K. G., do Vale Almeida, K. I., de Moura, L. C. A. S., Batista, L. P., Melo, L. A. G., da Silva, M. H. L., de Souza, D. C. S., da Silva, E. F., Silva, D. V., Batista, R. O., do Carmo, F. R., & de Antunes, L. F. S. (2026). Biochar in plant growing media: A scientometric analysis (2011-2024). Journal of Soil Science and Plant Nutrition.