You can deluge your plants with water as long as dont do it day after day if you do that then your plant will be in a over watered condition. I have to leave for several days. I deluge my plants, and with in 5 days they need water again. Cannabis is a semi- arid plant it doesn't need alot of water to survive. You can notice this when your plant is in a drought state the container can be almost bone dry for a day or two before the plant starts to wilt. Because its semi-arid the plant has defenses to slow down transpiration to preserve water. I have a few friends that wait till there plants start to wilt before they water. Idk its just how they like to roll.
You can't really say chlorosis is solely caused by a (N) deficiency. Over watering will cause this condition, among several other variables. You need to look at a plant deficiency chart. The cause of the chlorosis will be accompanied with other characteristics to give you the proper diagnosis.