Assuming you're referring to the period of Ancient Rome, it was generally not a good idea for the censors to rank and re-rank citizens into different classes because it bred animosity between the classes, which led to domestic uprisings and disorder.
<em>It was generally not a good idea for the censors to rank and re-rank citizens into different classes because it bred animosity between the classes, which led to domestic uprisings and disorder. </em>
Irrigation is the spreading of water over crops for the purpose of farming. The way it's done can vary, but its general use is as described above. Sprinklers and aboveground canals are two examples of it.
