Originally, exactly as much as a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice. I don't find that terribly helpful. Not many did. That's why, in 1889, the mass of the kilogram was redefined as being equal to the IPK.
Boiling water is also an effective poison ivy killer. If the area where you will be killing poison ivy has no other plants you wish to keep, pour boiling water over the poison ivy plant. Boiling water will kill any part of a plant that it comes in contact with, so be careful using this around desirable plants.
8+ Amazing Home Remedies for Poison Ivy Rash. Coming into contact with the poison ivy plant can cause an itchy and irritating rash in about 50 percent of people. The rash stems from a urushiol â an oily resin â sensitivity. Mild rashes will not require medical treatment, but they can still be incredibly irritating. This is where home remedies for poison ivy come in.