ACE:10.2136/sssaj2006.0281
ACE:10.2136/sssaj2010.0382
ACE:10.2136/sssaj2011.0040
ACE:10.2136/sssaj2013.01.0044
ACE:10.2136/vzj2006.0091
ACE:10.2136/vzj2012.0033
ACE:10.2136/vzj2012.0137