Sealing ground herbicide, also known as soil treatment agent, before the emergence of weeds, spraying with herbicides such as ethylene mixture, the formation of a layer of film on the surface, when the weeds unearthed through the toxic soil layer, the weed coleoptile Or the root sheath is poisoned by herbicide poisoning and locked in the soil. This herbicide is safe for corn seedlings, and maize can be safely emerged because corn has an enzyme--maize ketone can decompose toxin from herbicides. Therefore, corn can be raised without any problems, weeds cannot be normally excavated, and the purpose of sealing and weeding can be achieved. Use skills: First, before the grass did not use, after the grass seedlings do not work (not out of corn does not matter); Second, better moisture conditions, the surface wet, grass seeds will germinate earlier, as early as possible through the poisonous soil, poisoning death . Herbicides are valid for 25-30 days. The third is more water, water enough (more than 2 barrels) to spray evenly sprayed; four is the evening medication, make full use of the dew "water" moisture good film. Respiratory Protection
is a device designed to protect the wearer from inhaling particulate
matter, including airborne microorganisms, fumes, vapours and gases.
There are two main categories: the air-purifying respirator which forces
contaminated air through a filtering element, and the air-supplied
respirator in which an alternate supply of fresh air is delivered.
Within each category, different techniques are employed to reduce or
eliminate noxious airborne contaminants. Respiratory Protection,Anti Dust Respirator,Ffp2 Dust Respirator,N95 Dust Mask Greateagle Safety Products Co., Ltd. , https://www.greateaglesafety.com
Respirators
range from relatively inexpensive single-use, disposable face masks to
more robust reusable models with replaceable cartridges.
They are also sometimes referred to as a dust mask or a gas mask.