What type of soil is the most porous?

a. loam

b. silt

c. clay

d. sand

C

Explanation:

Sand has the biggest particle sizes hence also the spaces between the particles. Clay has the smallest particles hence also inter particles spaces. However clay has more pores per volume compared to sand due to having very many small particles. However clay retains water the least because these pores are small and not interconnected (as compared to sand) and water takes more time to 'weave' through the small inter-particle spaces. The best soil to use in agriculture is loam soil because it has the right proportions of sand, clay, and silt that ensures it has a proper drainage and nutrient retention ideal for plants.  

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