Windbreaks are more effective for plants with heavy pollen like corn, than for plants with light pollen like beets or lamb's quarters.
(Windbreaks; are; more effective for plants with heavy pollen like corn, than for plants with light pollen like beets or lamb's quarters)
Windbreaks
are
more effective for plants with heavy pollen like corn, than for plants with light pollen like beets or lamb's quarters