Thanks for beating me to it.
When I was growing up, my best friend’s dad was the chief explosives guy at a local quarry. Got quite an education from him in how to make big rocks into little rocks. He used fertilizer and diesel, and a blasting cap. Cheap, effective and versatile.
My buddy on 'Nam used to talk of how he & his dad would dig a 6 foot deep hole in a shallow gully, break open two 100lb bags of NH4NO3 fertilizer, pour in two jerry cans of diesel then drop in a 1/4 stick of dynamite with blasting cap.
When the rains came, the resulting 30 foot diameter crater would fill up and make a nice stock tank for the cattle to drink from. Their Montana farm needed all the water catchment they could make.