STUDIES ON DIRECT CAULOGENESIS CULTURE OF MORINGA OLEIFERA, AN EXOTIC MULTIPURPOSE TREE SPECIES FOR ROMANIA Journal title: Current Trends in Natural Sciences Authors: Silvana Mihaela Dănăilă-Guidea, Luminiţa-Valerica Vişan, Ricuţa-Vasilica Dobrinoiu, Dragoş Perşoiu,... Subject(s): Horticulture, Soil Sciences, Ecology, Landscape, Biology, Environmental Protection