With the help of bacteria in the soil, what nitrogen compound must atmospheric Nitrogen (N2) be converted into before it can be taken in (assimilated) by plants?

Atmospheric Nitrogen (N2)
Ammonium compounds (NH4)
Nitrites (NO2)
Nitrates (NO3)

Before it can be taken into the atmosphere nitrates no3 the ammonification process will make this happen.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave