Answer: A tsunami is a giant wave (or series of waves) created by an undersea earthquake, volcanic eruption or landslide. Tsunamis are often called tidal waves, but this is not an accurate description because tides have little effect on giant tsunami waves.nswer: A tsunami is a giant wave (or series of waves) created by an undersea earthquake, volcanic eruption or landslide. Tsunamis are often called tidal waves, but this is not an accurate description because tides have little effect on giant tsunami waves.
Roundup is not persistent in the soil. You can lay your sod one week after spraying the weeds. The herbicide will get into the growth of any plant it touches, not anything the chemical does not touch. I don't know of a pre-m herbicide that controls germination of any weeds likely to grow this time of year. Pre-m only prevents weed seeds from germinating.
How Roundup Works. The primary herbicidal compound in Roundup is glyphosate, which has the chemical name N-(phosphonomethyl) glycine. When you apply Roundup to a plant's foliage, the plant tissues absorb the glyphosate and it moves throughout the plantâs system.As it travels systemically, glyphosate hinders a plantâs ability to synthesize the amino acids that regulate plant growth and the plant dies.f youâre planting lawn grasses, herbs, fruits or vegetables, wait for three days after applying these Roundup products -- except for Roundup Weed & Grass Killer Sure Shot Foam -- before you replant the treated area.