Perhaps you should try some spelling variations:
field progression » and progression (Expand search), cycle progression (Expand search), rapid progression (Expand search)
decrease litter » increased litter (Expand search), decrease after (Expand search), decreases liver (Expand search)
litter decrease » faster decrease (Expand search), life decrease (Expand search)
decrease field » decreases yield (Expand search), increase field (Expand search), decrease lipid (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » and decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease pro (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease to decrease field progression ) OR ( decrease the decrease litter decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease to decrease field progression ) OR ( decrease the decrease litter decrease ))*.