TY - JOUR AU - Garrett, R. E. AU - Zahara, M. TI - Cultural Practices: Affect success of U. C. lettuce harvester JF - California Agriculture JO - Calif Agr Y1 - 1965/07/01 VL - 19 IS - 7 SP - 4 EP - 5 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v019n07p4 AB - Certain conditions resulting from tilling, bed shaping, planting, thinning, and cultivating practices may cause lettuce heads to develop off center—which leads the U. C. mechanical selective lettuce harvester to “believe” that the heads are not ready to harvest, or affects the harvester's ability to cut the heads accurately.