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Editor’s Note: This story originally appeared on LawnStarter. This is how to make a good homemade weed killer: Mix 1 cup of salt with 1 tablespoon of liquid soap and 1 gallon of vinegar. Or, at least, that is one of the most popular DIY herbicide recipes for stubborn weeds. But that is not the only recipe for homemade weed killer! Some alternatives are even simpler to prepare and healthier for the…