Why were there many plants among annuals – field and vegetable weeds?

In various fields, weeds often appear among cultivated plants. Nobody plants the weed on purpose. It grows on its own and is difficult to remove. The fact is that the weed throws out a large amount of seeds. It is quite tenacious and much better adapted to dry climates, heat or cold than cultivated annuals. You can remove the weed from the field if these plants are removed for several years in a row before they throw out the seeds. Also, you can use a poison – a herbicide. He will help to destroy the unnecessary plant.