Small farm irrigation

I have installed the beginning of my drip irrigation system. I heavily mulch my beds. My question is about burying my drip tubing. I use 1/2" drip tubing with .9gph emitters spaced 9" apart. I run it all at 25psi. In the fall, because of my setting on the slope, I drain my system using gravity assisted by an air inlet up top. My concern is that when I drain my system it will create negative pressure at each emitter creating the potential for the emitter to suck in debris. I want to bury my drip tubing under my mulch. Has anyone used this method and have you had any problems with the emitters getting clogged by debris sucked in by this negative pressure?

I doubt it will be an issue.
I have used this material for years.
Think about having a tap at the lower end of the system to drain out the water, with the open end at the top it will quickly drain.
Then close everything.
If its left over winter you may find bugs crawl in the emitters anyway, so think about how you will do that.
Sometimes its better to use 3/4 tube, with a return loop on it to equalise the water pressures and thus the flow.