Argentina article 209 nonhuman 139 plant 69 controlled study 66 Animals 59 South America 58 unclassified drug 58 physiology 54 genetics 51 Fungi 50 plant leaf 50 microbiology 49 chemistry 47 classification 42 isolation and purification 39 Plant Leaves 38 growth, development and aging 38 metabolism 38 plant root 36 Patagonia 35 plant extract 34 Plant Roots 32 Plants (botany) 32 animal 32 Article 30 plant community 30 priority journal 30 Plants 29 Water 29