What is the half life of potassium argon dating
A very small percentage of the carbon plants take in is radioactive C-14.When a plant or animal dies it stops taking in air and food so it should not be able to get any new C-14.
You will not be able to fill the barrel past this point of equilibrium.
Plants breathe CO2 and make it part of their tissue.
Animals eat the plants and make it part of their tissues.
Radiation from the sun strikes the atmosphere of the earth all day long.
This energy converts about 21 pounds of nitrogen into radioactive carbon 14.