Perhaps you should try some spelling variations:
decrease lignin » increases lignin (Expand search), decrease lipid (Expand search), decrease lodging (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
or decreased » or decrease (Expand search), of decreased (Expand search), or decreases (Expand search)
decreased il » decreased in (Expand search), increased il (Expand search), decreased by (Expand search)
lignin based » lignin and (Expand search)
decrease or » decrease of (Expand search), decrease pro (Expand search), decrease toc (Expand search)
il decrease » l decrease (Expand search), will decrease (Expand search), oil decreases (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease OR decreased il decrease ) OR ( decrease that decrease lignin based ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decreased il decrease ) OR ( decrease that decrease lignin based ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decreased il decrease ) OR ( decrease that decrease lignin based ))*.