Founded in 1893, the Botanical Society of America (BSA) is a "not-for-profit" 501 (c) (3) membership society whose mission is to: promote botany, the field of basic science dealing with the study and inquiry into the form, function, development, diversity, reproduction, evolution, and uses of plants and their interactions within the biosphere.
farming systems
Different types of farming and methods of cultivation, e.g. shifting cultivation systems, ley systems, systems with permanent upland cultivation, fallow systems, grazing systems and systems with perennial crops.