Identify the physical property of soil investigated, describe the experimental procedure, and classify three soil samples (P, Q, R) based on their water retention capacity.

Here are the steps followed:

• Soil Q is sandy soil. Reason: Sandy soil has large particle sizes and large pore spaces, which results in weak capillary action and therefore the lowest rise in water (9.0 cm).
• Soil R is loam soil. Reason: Loam soil is a mixture of sand, silt, and clay, giving it moderate particle sizes and pore spaces, leading to an intermediate rise in water (17.0 cm).
• Soil P is clay soil. Reason: Clay soil has very small particle sizes and very fine, numerous pore spaces, which creates strong capillary action, allowing water to rise to the greatest height (28.0 cm).

• Clay soil (P) has the smallest particles, creating many tiny pore spaces. These small pores exert strong capillary forces, pulling water up to the highest level (28.0 cm).
• Sandy soil (Q) has the largest particles, resulting in large pore spaces. These large pores have weak capillary forces, causing water to rise to the lowest level (9.0 cm).
• Loam soil (R) has a balanced mix of particle sizes, leading to intermediate pore sizes. This results in moderate capillary action, allowing water to rise to an intermediate height (17.0 cm).