An advantage of using fertilizers derived from natural sources is that these fertilizers
a. Have different minerals than artificial fertilizers.
b. Are retained in soil longer.
c. Are more soluble in water.
d. Are more concentrated.

Verified step by step guidance

1. Understand the context of the problem: Fertilizers are substances added to soil to supply essential nutrients for plant growth. Natural fertilizers are derived from organic sources like compost, manure, or bone meal, while artificial fertilizers are chemically synthesized.
2. Analyze the options provided: Each option describes a characteristic that could differentiate natural fertilizers from artificial ones. Consider the properties of natural fertilizers and how they interact with soil and water.
3. Evaluate option (a): Natural fertilizers do not necessarily have different minerals than artificial fertilizers. Both types can provide similar essential nutrients like nitrogen, phosphorus, and potassium, but the source and form of these nutrients differ.
4. Evaluate option (b): Natural fertilizers are often retained in soil longer because they release nutrients more slowly as they decompose. This is due to their organic composition, which requires microbial activity for nutrient release.
5. Evaluate option (c) and (d): Natural fertilizers are generally less soluble in water compared to artificial fertilizers, as they are not chemically processed for immediate dissolution. Additionally, they are typically less concentrated in nutrient content because they are derived from organic matter.

Key Concepts

Natural vs. Artificial Fertilizers

Natural fertilizers are derived from organic sources such as plant and animal matter, while artificial fertilizers are synthetically produced. Natural fertilizers often contain a broader range of nutrients and beneficial microorganisms that can enhance soil health, whereas artificial fertilizers typically provide specific nutrients in concentrated forms.

Nutrient Retention in Soil

The ability of fertilizers to remain in the soil is crucial for plant growth. Natural fertilizers tend to improve soil structure and increase its organic matter content, which can enhance nutrient retention and reduce leaching compared to some artificial fertilizers that may wash away more easily.

Solubility and Concentration

Solubility refers to how well a substance dissolves in water, affecting nutrient availability to plants. While natural fertilizers may be less concentrated than artificial ones, they often release nutrients more slowly and steadily, which can be beneficial for sustained plant growth and minimizing nutrient runoff.