A lagoon pump may comprise a chassis structure having front and rear ends; a tow bar couple releasably to the front end of the chassis structure; a centrifugal pump couple to the rear end of the structure; a diesel engine fluidly connected to a fuel tank; a clutch rotationally connected to the diesel engine; an extended driveline directly connected to the clutch at one end and to the pump at an opposed end to drive the pump via rotational energy from the diesel engine; a pair of steerable wheels connected adjacent the front end of the chassis structure; and ground engaging wheels connected under the chassis structure between the ends, wherein the ground engaging wheels are both extendable radially outwardly and rotatable axially relative to the chassis structure. A method of mixing and pumping a slurry material from a lagoon or storage pit utilizing such a pump is also disclosed.