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.
If you need to clear a grassy or weedy area in your yard before you plant a garden, Roundup herbicide may be the solution. However, Roundup, which is manufactured by the Scotts Miracle-Gro Company, is available in different formulations. How soon you can replant an area after using Roundup depends on which product you use. The primary herbicidal compound in Roundup is glyphosate, which has the chemical name N-(phosphonomethyl) glycine.