During research for applying various soil amendments in liquid form I have been advised not to use roller pumps or spray booms on my tractor mounted spray rig. Is this valid information? I was instructed that only a diaphgram pump and a broadcast type nozzle can be used because otherwise I would be harming/killing the beneficial microbes that I was trying to apply. Not being able to use a boom sprayer limits the application process because of our wind conditions in western areas of North Texas.

I can't help you much on this post but if you move it to the area listed below, you should get help. I can't imagine how a sprayer could hurt microbes ???

http://www.dirtdoctor.com/forum/viewforum.php?f=19

This should actually be posted in another section besides "How to Use This Discussion Board".

Who advised you? I do not know how thi application method would be harmful. Only if you use it to spray pesticides or herbicides, and surely you would not do that, right?