TY - JOUR AU - Beard, Benjamin H. AU - Ingebretsen, Karl H. TI - Spring planting is best for oilseed sunflower JF - California Agriculture JO - Calif Agr Y1 - 1980/06/01 VL - 34 IS - 6 SP - 5 EP - 6 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v034n06p5 AB - Plantings in April or May gave the highest seed production and oil content in tests with new oil-type sunflowers.