Flex-tine harrows are used broadcast, both over
and between the crop rows. They are most
efficient when weeds are in the white-thread or
cotyledon development stage. In direct-seeded
crops, such as snap beans or sweet corn, flex-tine
implements are used preemergence. Tines pass
above the planted seed. Harrowing can be
repeated postemergence for control of newly
germinated weeds, but only when the crop is wellrooted.
Cultivation intensity can be modified to
minimize crop damage. Guide wheels and tine
intensity regulate harrowing depth.