Diversity and dynamics of tree species and its sustainability in rural farmland. A case study in Chitwan district, Central Terai of Nepal

agricultura de subsistencia agriculture de subsistance arbre arbuste arbustos biodiversidad biodiversity comportamiento humano comportement humain conservation de la nature crops cultivos domestic gardens especies farm income farmland forest resources hogares households huertos familiares human behaviour jardin familial nature conservation nepal petite exploitation agricole plante de culture pueblos recursos forestales revenu de l'exploitation rural areas shrubs sistemas de valores small farms sostenibilidad species subsistence farming sustainability terre agricole trees value systems village villages zonas rurales zone rurale