Cement is a fine, soft, powdery-type substance. It is made from a mixture of elements that are found in natural materials such as limestone, clay, sand and/or shale. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.
Overview. While onions may be welcome in your vegetable garden, they are considered weeds in your lawn. Onion grass, a type of wild onion, often flourishes in yards, particularly in the southeastern region of the U.S. Like most common lawn weeds, onion grass can be eliminated with commercial herbicides and weed killers.tep 2. Cut onion grass very short to prevent flowering. Onion grass reproduces by flowering and seeding. By cutting onion grass to the same height as your lawn grass, you can stop it from spreading.
How to Kill Grass Using Vinegar. Kill unwanted grass with vinegar. White or pickled vinegar is another great way to kill your grass without the use of harmful chemicals. It is safe and will not harm the environment.s with newspaper, it is often helpful to mow the grassy area first or you may want to till it and then rake the area smooth. Cover the grass with black plastic. Unlike clear plastic, black plastic blocks out light, smothering grass roots and preventing new growth. Secure the plastic with large rocks.