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).
This is a study in which 1) There are two groups, one treatment group and one control group. The treatment group receives the treatment under investigation, and the control group receives either no treatment (placebo) or standard treatment. 2) Patients are randomly assigned to all groups. 1  Randomized controlled trials are considered the âgold standardâ in medical research.