seeds
Farmers plant seeds.
Weeds' Seeds :)
Congress grass
Weeds' Seeds ;)
Human intervention, water flow, wildlife dispersal and wind currents are ways that seeds of weeds spread.
Weeds are persistent because sometimes when you pluck up a weed you don't get the whole plant. Weeds are so hardy that if some of the roots are still there it can grow back. Some weeds also have seeds that can fly large distances on the wind.
No, since the seeds are too small for a sheep to find and eat. Sheep cleanse their pastures of weeds, which eliminates the weeds' ability to spread and establish themselves and thus get "weeded out" by the natural grazing behaviour of the sheep.
water + earth = swamp swamp + energy = life water + life = weeds swamp + weeds = moss earth + moss = grass
No. Even with a 2mm sieved soil, you'd still get some weeds growing because the seeds are actually smaller than 2mm. You would probably reduce the global amount and biodiversity of the weeds, though.
the definition of a weed is a plant which grows out of place. a beautiful tulip would be a weed if it grew in a wheat field and the same wheat would be a weed if it grew in a tulip field.zaf. Almost all weeds fall into the category - environmental weeds. The worst weeds are the ones that spread rapidly, have particularly opportunistic characteristics and are difficult to remove once established. Opportunistic weeds that are established often drop thousands of seeds. Weed seeds are spread by animals and the weather.
Yes, garden weed seeds are available online for a Science Fair project on weeds. Weeds can be defined as plants whose benefit is forgotten or unknown as well as plants that are not where their gardeners wish them to be. Such definitions include field plants and wildflowers whose seeds may be purchased from online garden centers and nurseries specializing in edible yards, meadow gardens and native plants.