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adding references, category
*Planting of cornflower or marigold borders around crop fields in order to ward off insects
*Planting of cornflower or marigold borders around crop fields in order to ward off insects
*The use of phenological indicators to time planting and other tasks
*The use of phenological indicators to time planting and other tasks
==References==
<references/>
==External Links==
*http://www.sustainable-agriculture.org/bottom.html
[[Category:Agriculture]]