Deletion of Plant cover

Comment: Despite the refs being "improved", I find it completely unacceptable that this topic has a Christian Damgaard essay used as a source, since the article was written by Christian Damgaard. We don't put thesis papers or other  on here. That information needs to be removed. Huge WP:COI and ADVERT there. &mdash
Stance: comment
Cited policy: Wikipedia:No original research (WP:OR)