necrosis n - the localized death of living cells in a plant characterized by dried, brown, and crusty spots on vegetation
negative ion generator n - device that produces negative ions to clean the air and neutralize odor
neutral adj - having only a limited ability to react chemically; not active; having a pH of 7
nitrogen (N) n - a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues; one of three major nutrients used by the cannabis plant to synthesize amino acids, proteins, chlorophyll, DNA, enzymes, and hormones; purchased as a nitrate in fertilizer
nitrogen deficiency n - plant disease resulting from lack of enough nitrogen, characterized by uniform chlorosis of the leaves beginning at the bottom of the plant, slow growth, and some wilting
node n - the point on a stem where a leaf is attached or has been attached; a joint
NPK - acronym for Nitrogen Phosphorous Potassium; labeled as percentages of content in fertilizer such as 3-5-3, 20-10-10, 12-27-15, etc
nutrient n - a source of plant nourishment; any of the a number of chemicals and compounds such as nitrogen, potassium, phosphorous, calcium, magnesium, etc. required for plant growth
nutrient deficiency n - plant disease resulting from lack of enough of one or more of the necessary plant nutrients
nutrient solution n - fertilizer containing chemical compounds dissolved in water | 
