[deepsun]

I got curious, could we make "underground irrigation" to reduce evaporation of water?

I mean, water underground is usually contained on a certain level (or levels), e.g. if there's a clay soil layer, then almost always there's water above it, because clay is hardly permeable by water.

We could make an artificial clay layer (or plastic or whatever that's hard for water to get through), at a depth of a few feet or meters. That way, water would evaporate way less than with open surface irrigation/watering.

[geoduck14]

Are you describing Drip Irrigation? Because THAT IS awesome, but I don't know enough about it to know if it could solve all of our Watermelon Woes.

[deepsun]

With Drip Irrigation water would be allowed to sip deeper into the ground. What I'm thinking of is more like hydroponics, but with regular soil medium in a typical farm environment.