Which of the following is a primary benefit of using manure as a nutrient source?

Using manure as a nutrient source offers various benefits, and one of the primary advantages is its stable nutrient release. Manure is an organic material that contains not only essential nutrients such as nitrogen, phosphorus, and potassium but also a range of micronutrients. When applied to the soil, the nutrients from manure are released over time, rather than all at once. This gradual release helps to match plant nutrient demands throughout the growing season, reducing the risk of nutrient leaching and volatilization, which can occur with synthetic fertilizers.

The stability in nutrient release from manure enhances soil fertility and overall plant health, as it supports sustained growth and minimizes the need for frequent reapplication of fertilizers. This characteristic makes manure a valuable resource for farmers looking to maintain soil quality while promoting crop production efficiently.

In contrast, other choices like higher phosphorus availability, increased transportation costs, and lower water retention do not accurately represent the advantages of using manure. While manure can contain phosphorus, its overall benefit stems from its ability to provide stable nutrient release, thereby supporting sustainable agricultural practices.