True or False? Organic matter significantly contributes to the soil's nutrient and water-holding capacity.

Organic matter plays a crucial role in enhancing both the nutrient and water-holding capacity of soil, making the statement true. When organic matter, such as decomposed plant material and animal residues, is present in the soil, it aids in creating a structure that increases pore space. This larger pore space allows the soil to retain water more effectively, making it available for plants even during dry periods.

Additionally, organic matter contributes to the nutrient-holding capacity of soil through its ability to bind with nutrients and improve the soil's cation exchange capacity. This means that essential nutrients such as nitrogen, phosphorus, and potassium are held in the soil in forms that are more accessible to plants. Furthermore, organic matter promotes microbial activity, which is important for nutrient cycling and overall soil health.

While the presence of organic matter is beneficial across various soil types—whether sandy or clay—it is particularly impactful in all soil types by promoting a balanced environment for plant growth and improving overall soil fertility. This reinforces the correctness of the statement regarding the significant contributions of organic matter to both nutrient and water retention in the soil.