TY - JOUR AU - Pratt, P. F. TI - Sulfur requirement of soils for control of scab disease of potatoes estimated rapidly by new method JF - California Agriculture JO - Calif Agr Y1 - 1961/08/01 VL - 15 IS - 8 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.v015n08p5 AB - Coarse-textured noncalcareous soils of southern California often require the addition of sulfur to acidify the soil for the control of scab disease of potatoes.