Primary tillage and cultivation can also increase weed problems by pulling deeply buried weed seed to the soil surface where it can germinate.
(Primary tillage and cultivation; can increase; weed problems; by pulling deeply buried weed seed to the soil surface) (it; can germinate; L:the soil surface)
Primary tillage and cultivation it
can increase can germinate
weed problems by pulling deeply buried weed seed to the soil surface
L:the soil surface