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Wood vinegar, a valuable byproduct of biomass pyrolysis, has gained increasing attention due to its potential applications in agriculture, forestry, environmental sectors and other fields. This study presents a comprehensive bibliometric analysis of research conducted in the field of wood vinegar during the period 2002–2022. The aim is to explore research productivity, collaboration patterns, and publication trends in this domain. A systematic search of the Scopus database yielded 460 scientific articles from journal sources. The collected data were analyzed using bibliometric techniques, including co-authorship analysis, citation analysis, and keyword co-occurrence analysis. The results reveal a steady growth in the number of publications on wood vinegar over the years, indicating a growing research interest in the field. The number of papers published each year increased from 7 in 2002–79 in 2022. The growth increase in 2022 versus 2019 was + 170%. Analysis of authorship patterns highlighted key contributors and collaborative networks within the research community. The most productive country was China with 191 papers. Citation analysis provided insights into influential studies and the impact of research in the field. Through keyword co-occurrence analysis, the study identified prominent research themes and emerging topics within wood vinegar research. This bibliometric analysis offers a comprehensive overview of the research landscape in the field of wood vinegar, facilitating a better understanding of its progress, impact, and potential avenues for future research. [Display omitted] • A bibliometric study was conducted on 460 papers covering the year range 2002–2022. • Research performance and trends over the last four years were further analyzed in SciVal. • Wood vinegar showed a diverse range of applications and potential research trends. • China was the most productive country. • Wood vinegar is and will still being a research trend in the coming years. [ABSTRACT FROM AUTHOR]

Urea is one of the most commonly used nitrogen fertilizers in agricultural soil and is easily decomposed by soil urease resulting in ammonium release. The produced ammonium can be volatilized or converted to nitrate, which is susceptible to leaching, leading to groundwater contamination unless used by plants. Hence, it is important to control the release of nitrogen from the urea. Pyroligneous acid inhibited the urease activity and decreased ammonium release up to 80% compared to the control. Amidase including asparaginase and glutaminase is an enzyme that catalyzes hydrolysis of amide group, similar to urease. Therefore, the effect of pyroligneous acid on the inhibition of soil amidase was also tested and the results showed that pyroligneous acid competitively inhibited asparaginase while glutaminase was not inhibited. However, inhibitory effect of pyroligneous acid on asparaginase was negligible compared to the urease. The application of pyroligneous acid with a smaller amount of urea for controlled nitrogen release during Chinese cabbage growth showed that dry biomass and nutrient contents of Chinese cabbage were similar to the case of the conventional urea application. The nitrogen utilization efficiency (NUE) was highest for 33% less amount of urea supply with pyroligneous acid (2.21) compared to conventional treatment (1.81). Consequently, the use of pyroligneous acid with urea enhances nitrogen use efficiency while also protecting environments from non-point source contamination., (Copyright © 2021 Elsevier Ltd. All rights reserved.)