Deer destroy gardens by feeding on plant leaves, stems and roots. Fortunately, catnip, chives, dill, garlic, lavender, onion, oregano, rosemary, sage, spearmint and thyme keep deer away from your garden, lawn and shrubbery. While people find the smell of these herbs pleasant, deer dislike their odor and give areas planted with them a wide berth.
From RationalWiki. An experimental control, often referred to as a control group, is a population or set of objects that is statistically similar to the set being tested, on which no changes are implemented. In psychology and biology, the control group is very important, since results are often statistical rather than concrete. For instance, in testing a drug for a malady, some percentage of the test subjects will heal with no intervention (or heal at some rate in a third group, people getting an existing remedy).
Control group marketing is commonly combined with test marketing where only a sample of the marketing list is sent an offer to test the campaign.This allows you to determine the probable effects of the marketing campaign without spending a lot of money.A common number for the size of the control group is 10 percent of the size of the campaign or test group. Ideally you would like your control group to be a truly random sample of your campaign list.his allows you to determine the probable effects of the marketing campaign without spending a lot of money. A common number for the size of the control group is 10 percent of the size of the campaign or test group. Ideally you would like your control group to be a truly random sample of your campaign list.