Preliminary animal waste preparation depends on the type of waste received. Solid wastes, such as poulty litter, are dried in an oven at 75°C, ground to pass a 2 mm screen, and stored at room temperature prior to analysis. Liquid waste samples, such as from lagoons, are analyzed as received. Nitrogen is analyzed via a combustion instrument. Two grams of the ground solid waste or 2 ml of a well mixed liquid waste is analyzed. The animal waste is subjected to wet acid digestion for determination of other nutrients. Two g of material is digested with a combination of HCl and H₂SO₄ acids. The digestate is analyzed for P, K, Ca, Mg, Zn, Cu, Mn, and Fe using an ICP (Inductively Coupled Plasma Spectrometer). For solid wastes, moisture content is determined by weighing a sample before and after oven drying. Nitrogen, P₂O₅, and K₂O are reported on an as received basis as lbs per ton of for solids or lbs per 1000 gallons of liquids. The other nutrients are reported in units of % or ppm depending on concentration levels. Concentrations are reported on an as-received basis.