Agricultural sampling system and related methods

A method for forming and processing an agricultural slurry, the method comprising:

• adding water and agricultural solids to a mixing chamber of a mixing device;
• agitating the water and agricultural solids at a first speed with a rotatable first blade mechanism of the mixing device to form a slurry;
• discharging the slurry from the mixing device into a coarse filter unit via a flow conduit fluidly coupled therebetween;
• coarsely filtering the slurry through a filter screen of the coarse filter unit to remove particles in the slurry larger than a predetermined first maximum particle size;
• receiving the filtered slurry from the coarse filter unit in a stirring chamber of a stirring device defining the stirring chamber;
• and
• agitating the slurry with a rotatable second blade mechanism at a second speed different than the first speed in the stirring device;
• wherein the stirring chamber of the stirring device forms an integral part of a closed slurry recirculation flow loop fluidly coupled to the coarse filter unit, the slurry recirculation flow loop comprising a slurry recirculation pump which circulates the slurry through the slurry recirculation flow loop and the stirring device, the slurry recirculation flow loop being fluidly isolated from the mixing device when the slurry is circulating through the slurry recirculation flow loop.