Paul Sestras University of Agricultural Sciences and Veterinary Medicine Faculty of Forestry and Cadastre Department of Land Measurements and Exact Sciences 3-5 Manastur, 400372 Cluj-Napoca Romania Special Issue of Sustainability: Application of Remote Sensing and Machine Learning in Sustainable Agriculture Special Issue of AIMS Geosciences: Advances in Landslide Disasters Special Issue of Forests: Forest Ecology and Resource Monitoring Based on Sensors, Signals and Image Processing