Which soil type is associated with the highest rate of infiltration into the soil?

Which soil type is associated with the highest rate of infiltration into the soil?

• A. Loamy Sand
• B. Clay
• C. Gravel
• D. Sand

Answer: (D)

Water can enter soil most quickly when the soil has large, well-connected pore spaces. Coarser textures like sand have bigger voids and less capillary suction, so water moves downward with less resistance. Clay, with its very fine pores and high surface area, holds onto water and slows infiltration. Loamy sand sits between sand and clay in texture, so its infiltration rate is a bit slower than pure sand. Gravel is extremely coarse, but among common soil texture categories, sand best represents the highest infiltration rate due to its uniform, large pores and rapid drainage.

Water can enter soil most quickly when the soil has large, well-connected pore spaces. Coarser textures like sand have bigger voids and less capillary suction, so water moves downward with less resistance. Clay, with its very fine pores and high surface area, holds onto water and slows infiltration. Loamy sand sits between sand and clay in texture, so its infiltration rate is a bit slower than pure sand. Gravel is extremely coarse, but among common soil texture categories, sand best represents the highest infiltration rate due to its uniform, large pores and rapid drainage.