"And they have a great fibrous root system that holds soil and controls erosion".
Huge banana trees are costly to spray, and they hold soil in place.
Once completed, the storage facilities would hold soil and other contaminated waste for up to 30 years, local reports said.
The weed has also led to erosion because it does not hold soil as well as native grasses.
Natural ecosystems are complex, and dominated by perennials, a dense mat of fibrous roots that exists in the soil year-round, tightly holding soil and water.
Gravity, able to overcome the cohesive forces that hold soil particles together, can cause the entire soil profile to move downslope a phenomenon called mass movement.
And orchid pots, with slits or holes in the sides to accommodate oxygen-loving roots, don't easily hold soil or anything but wood chips for potting orchids.
Now, stone retaining walls hold soil and plants in place, and an ingenious drainage system designed by Vollmer Associates of New York channels torrential downpours away from the pond.
The impact of raindrops breaks the bonds holding soil aggregates together and catapults the particles into the flowing water from surface runoff.
In the absence of plants with roots to hold soil in place, Cambrian lands in general probably eroded more rapidly than they do now.
