How much milk does your dirt support?
The title is simply looking at the amount of ash in your forage. Forage has minerals such as calcium, magnesium, potassium, and others that compose a portion of the ash measurement. Unfortunately, it also has a sometimes-significant amount of plain dirt mixed in during harvest. It is original dirt on the plant (raindrop splash, flooding), but mostly dirt incorporated from mower knives cutting too close and digging in the soil; dirt incorporated by tilted knife updraft, and dirt incorporated by tedders, rakes, and improperly run mergers.