[JimtheCoder]

I probably have no idea what I am talking about, but I think the time of day plants are irrigated is quite important.

Hypothetically, if you were to water right after the sun goes down, or when the sun is going down, there would be reduced evaporation. But, at the same time, the roots would be sitting in a wet environment overnight, which encourages things like rot and fungal infections, as well as bugs and such.

Again, I'm not a commercial agriculture guy...just a home tomato grower...watering in the morning right before the sun comes up seems to be the consensus, and I have never heard of anyone watering any plant or crop, for that matter, during non peak times.