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).
There must be at least two groups in any valid experiment: the experimental and the control group. In this example, your experimental group is the bag of popcorn you placed in the refrigerator. An experimental group is the group that receives the variable being tested in an experiment. The control group is the group in an experiment that does not receive the variable you are testing. For your experiment, the bag of popcorn that remained stored in the cabinet is the control group.