First, read the English article below.

Scarification, also referred to as dethatching, is the process of vigorously raking or agitating the lawn in order to remove loose moss and other compact organic material.   If you have a small lawn, you can do this by hand. Simply rake the yard thoroughly and with ample force to lift the moss away. Use a spring-tine rake. If you have a larger lawn, you can get a dethatching blade for your lawn mower. Set the height adjustment so that the tines can touch the surface of the soil, but if you set it too low, you will also remove your grass. Dethatch your entire lawn using this method and dispose of the moss you remove. Alternatively, if you have a larger lawn you can also rent a power rake. These have a rotating spindle with flat blades attached that loosen thatch for clean up. You can rent on from most home improvement stores. It is especially important to dethatch your lawn if you apply a chemical herbicide to kill or weaken moss beforehand. Wait the recommended amount of time as indicated on the packaging before dethatching. Glyphosate-based herbicides are among the most popular currently on the market, but they tend to have mixed results when used to kill moss.  This chemical works by being absorbed through leaves and transferred into the root zone. The exact conditions needed to make glyphosate effective against moss are presently unknown, but for best results, apply the herbicide only if there are no competing plants that the herbicide might go after instead. As with any herbicide, follow the label instructions carefully. While these herbicides are less common, they tend to have a higher rate of success when used to kill moss. Iron or ferrous sulfate is recommended most often, but ammonium sulfate and copper sulfate herbicides are also effective.  Iron weakens the moss, often killing it in the process or making it easier to kill and remove manually. Spray a 5 gallon (20 L) mixture over a 1000 square feet (304.8 square meters) area. The mixture should be about 3 oz (90 ml) of iron sulfate to 5 gallons (20... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Loại bỏ rêu mọc rời bằng cách xới đất. Thử dùng thuốc diệt cỏ glyphosate. Sử dụng thuốc diệt cỏ sắt sulfat hoặc một loại sulfat khác. Cân nhắc dùng xà phòng diệt rêu.