Figure 2: Environmental blocking and external validation results for seed proxy. For all plantings, models were trained on data from six plantings and validation performed on the seventh planting. HF = Halle, Fall 2006. NF = Norwich, Fall 2006. NSP = Norwich, Spring 2007. NSU06 = Norwich, Summer 2006. NSU07 = Norwich, Summer 2007. OF = Oulu, Fall 2007. VF = Valencia, Fall 2006.