Management Level 1† | 2009 | 2010 | 2011 | 2009-2011 | Management Level 2‡ | 2009-2011 |
----------------kg ha−1----------------- | --kg ha−1-- | |||||
Closed tile | 4696 a§ | 4155 a | 2378 a | 3743 a | Limited management | 3679 b |
Open tile | 4504 a | 4211 a | 2528 a | 3748 a | Best Management | 3812 a |