Perhaps you should try some spelling variations:
increase field » increase yield (Expand search), increases yield (Expand search), increased yield (Expand search)
decrease urea » decrease treg (Expand search), decrease burden (Expand search), decreases areas (Expand search)
urea decrease » urea increases (Expand search), the decrease (Expand search), or decrease (Expand search)
field effects » field effect (Expand search), fixed effects (Expand search), mixed effects (Expand search)
decrease toc » decrease the (Expand search), decreased to (Expand search), decrease on (Expand search)
toc increase » c increase (Expand search), co2 increase (Expand search), cox increase (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease urea decrease of decrease ) OR ( decrease toc increase field effects ))~.