According to Joseph Cocannouer, weeds perform the following valuable services among others:

1. They bring minerals and make them available to crops.
2. When used in crop rotation they crop roots to feed deeply.
3. They fiberize and condition the soil make any soil productive.
4. They are good indicators of soil condition.
5. Weeds are deep divers and feeders they enable crops to withstand drought better.
6. As companion crops they enable our domesticated plants to get unavailable food.
7. Weeds store up minerals and nutrients and keep them readily available.
8. Weeds make good eating.