There are times when you do not want to disturb the soil in the application of nutrient rich effluent. This is generally done with the top water and not an agitated lagoon that has lots of solids.
Hog effluent and top water of agriculture and municipal lagoons are great candidates for Big Gun application of effluent.
To see chicken manure effluent applied to forestry timber and power line right of ways click on the YouTube video below.