Not a geocaching question since we are not allow to dig or use pointy objects to make holes but I can't see that that is a problem for Arizonans in the desert areas since I find it virtually impossible to dig a hole in this 
<span class="mark" id="misspell-0">caliche soil.&nbsp; I believe it&#39;s also known as hardpan.&nbsp; Just how to you guys dig a hole, my gosh, I just wanted to plant a few cacti before the temps went over 100F one morning.&nbsp; </span>