Crop Production for Agricultural Improvement.Yeah, I wish weed was the answer.

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Oregon State Office (1985).For all these reasons; horticulture, both functional and cosmetic, and environmental, - weeds interfere by: competing with the desired plants for the resources that a plant typically needs, namely, direct sunlight, soil nutrients, water, and (to a lesser extent) space for growth; providing hosts and.Retrieved "Rethinking a Weed: the Truth about Amaranth".

The weedy nature of these species often gives them an advantage over more desirable crop species because they often grow quickly and reproduce quickly, they commonly have seeds that persist in the soil seed bank for many years, or they may have short lifespans with.E S Livingstone 1962 Roberts, John; Jackson, Nick; Smith, Mark.