Nitrogen form Symbol Use in soils and plants; Dinitrogen (Atmospheric Nitrogen) N 2: Dinitrogen is the most common form. It makes up 78 percent of the atmosphere but cannot be used by plants. It is taken into the soil by bacteria, some algae, lightning, and other means. Nitrate: NO 3: Nitrate is the form of nitrogen most used by plants for growth and development.
Reacting when you hear the tornado sirens go off is key. Emergency officials want reaction to be instinctive, not a frenzy of confusion, when you hear the siren sound. You'll have two chances to practice when the sirens sound today. The first drill will happen between 10 and 10:30 a.m. when children are in school.
Most local and statewide radio, TV and cable stations will be participating in the drill. Television viewers and radio station listeners and TV viewers should hear or see a simulated tornado warning message at 1:45 p.m. This tornado drill warning should last about one minute.he reason for a 6:55 p.m. drill is that severe weather including tornadoes occurs most often between 3 and 8 p.m. The statewide 1:45 p.m. drill gives institutions, first-shift and day workers a time to practice, but it does not allow second-shift workers the same opportunity.