Soil with the finest texture is?

Analyze the question: You're asked which soil type has the finest texture. Texture refers to the size of the soil particles, so the finest texture means the smallest particles.

Explain the concept: Soil is classified by particle size (from largest to smallest):

| Soil particle | Approx. diameter | |---|---| | Gravel | above 2.0 mm | | Coarse and fine sand | 0.02 to 2.0 mm | | Silt | 0.002 to 0.02 mm | | Clay | below 0.002 mm |

Step-by-step solution:

1. Gravel has the biggest particles, so it is the coarsest.
2. Sand is next, and it feels gritty.
3. Silt is smaller and feels smooth or floury, like powder.
4. Clay has the smallest particles, which feels sticky when wet and hard when dry.

Because clay has the smallest particles, it has the finest texture. This also explains its properties: tiny particles pack tightly, leaving very small pore spaces. So clay holds water well (high water retention), has poor drainage and poor aeration, and is often waterlogged.

Answer: The correct option is B. clay.

Exam tip: Remember the order from coarse to fine with "G-S-S-C": Gravel, Sand, Silt, Clay. The last one is the finest. Also, "Clay is Closely packed", which helps you link clay to small particles, poor drainage and high water retention.