Nitrogen in soil is considered a saturated solution. In chemistry, a saturated solution is one where a solute is dissolved in a solvent to the maximum extent possible at a given temperature and pressure. Any addition of solute beyond this point will not dissolve in the solvent and will settle out as a precipitate or remain undissolved.
In the context of soil, nitrogen acts as a solute, and the soil acts as a solvent. The soil can hold a certain amount of nitrogen, and once it reaches its capacity, it becomes saturated. Hence, the correct answer is "Saturated."
In the system shown below, $x(t)=\sin(t)u(t)$. In steady-state, the response $y(t)$ will be 
The time constant of the network shown in the figure is 
The parallel RLC circuit shown in the figure is in resonance. In this circuit, 