Jerry ClarkCrops & Soils Educator for Chippewa, Dunn, & Eau Claire CountiesUW-Madison Extension Manure is the oldest, natural fertilizer source known to agriculture. Manure has value since it contains nitrogen, phosphorus, potassium, micronutrients, organic matter, and microorganisms. Putting a dollar value on manure can be challenging when selling or purchasing. With synthetic and commercial fertilizer, […]