At low infestation levels, docks cause no serious setback to grass but once this gets beyond 10% groundcover, docks significantly reduce grass yield and quality as they become major contenders with grass for sunlight and nutrients.
(they; become; major contenders with grass for sunlight and nutrients) (docks; reduce; grass yield and quality; T:as they become major contenders with grass for sunlight and nutrients) Context(docks reduce,List([110, 136))):(docks; cause; no serious setback; L:At low infestation levels)
docks reduce,List([110, 136))
they docks docks
become reduce cause
major contenders with grass for sunlight and nutrients
grass yield and quality T:as they become major contenders with grass for sunlight and nutrients
no serious setback L:At low infestation levels