Unlike fast-acting drugs like heroin or cocaine, marijuanaâs active ingredient is stored in your body and can be detected for up to four weeks in long-term users. Your body stores THC in fat cells, which release the chemical slowly into the bloodstream.
There are three main types of fertilizers: organic, water-soluble and synthetic. Organic fertilizers are made from natural ingredients and have a slow release, meaning that the materials in these fertilizers must be broken down by soil microorganisms for the gradual release of nitrogen and other elements.
Laboratory tests often check for plant nutrients in three categories: 1  Major nutrients: nitrogen (N), phosphorus (P), and potassium (K) 2  Secondary nutrients: sulfur, calcium, magnesium. 3  Minor nutrients: iron, manganese, copper, zinc, boron, molybdenum, chlorine.