TY - JOUR AU - Peryea, Frank J. AU - Bingham, Frank T. TI - Reclamation and regeneration of boron in high-boron soils JF - California Agriculture JO - Calif Agr Y1 - 1984/10/01 VL - 38 IS - 10 SP - 35 EP - 35 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v038n10p35 AB - Not available – first paragraph follows: Although boron is an essential plant nutrient, it becomes toxic to growing plants if excessive levels are present in the root zone. Soils containing high native concentrations of boron occur primarily in arid and semiarid environments where drainage or leaching, or both, are restricted. Soils periodically exposed to water containing appreciable amounts of boron, including groundwater and irrigation water, may also develop elevated levels of the element.