This article aims to provide a scientific basis for solutions to use soil cover for sustainable agricultural and rational forestry development. We used traditional methods such as survey and data collection; soil profile comparison method; vegetation indicator for soil degradation; determining the physical and chemical limiting factors of the soil; combined with the application of Geographic Information Systems (GIS) technology and the multi-criteria method (MCE) to conduct a soil degradation assessment for the Thua Thien Hue province, Vietnam. In this study, nine indicators affecting the current soil degradation were selected and then the single-dimensional maps were superimposed to form the current soil degradation map for the study area at a scale of 1/10,000. The study results show that: lightly degraded soil accounts for 48.81% of the total natural area of the study area; medium degradation accounts for 22.07%; and severe degradation accounts for 19.66%. The study results show that most of the soil in the study area is at a moderate to severe level of degradation and shows the need for synchronous implementation of reasonable solutions to prevent degradation and use soil sustainably in the Thua Thien Hue province, Vietnam.

This study aims to conduct a bibliometric analysis of ecotourism literature in the period from 2002 to 2022 using VOSviewer software. 1,693 articles indexed by Scopus were analyzed. The results reveal that ecotourism is a developing research field that attracts scholars from many countries. Most of the articles were published in the United States, China, Indonesia, Malaysia, Australia, and the United Kingdom. The study identified four main thematic areas: (a) the involvement of local communities and stakeholders in ecotourism management and development in protected areas; (b) ecotourists’ perceptions, attitudes and behaviours; (c) the use of technology and environmental management to support ecotourism development planning and management; and (d) biodiversity conservation and sustainable development in ecotourism. This study suggests that decision-making based on data, stakeholder participation and climate adaptation in the planning and management of ecotourism is attracting the attention of researchers worldwide.