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www.hunker.com/13406943/why-does-clay-absorb-more-water-than-top-soil

The capacity of the soil to hold water against the pull of gravity is called its water holding capacity. Because clay is so fine and has such a high surface area per unit of volume it can absorb huge amounts of water. Top soil may contain organic matter that can absorb water but the surface soil has more large pores and holes than it does ...

www.hunker.com/13427778/which-soils-absorb-the-most-water

Clay soil is classified as a heavy soil and one of the most difficult garden soils. Due to its compact nature, clay is slow to absorb water and absorbs the least amount of water of all six soil types. It's hard when dry, sticky when wet, drains poorly and warms slowly in the spring. It holds the most nutrients of any soil, due to the poor drainage.

www.answers.com/Q/Why_does_clay_absorb_water

Clay is generally fired in two firings: when unglazed clay is fired in a low firing, it is called bisque. In this state, the clay will still absorb water, but it will not dissolve.

homeguides.sfgate.com/absorb-water-yard-89913.html

Clay soil, unsuitable planting and impermeable hardscaping prevents water from being absorbed by the ground, creating permanently boggy low spots where mosquitoes can breed. During heavy rains ...

www.reference.com/science/sand-absorb-water-55d557baaa269e29

Sand absorbs water because sand particles have pores in them that, when dry, are filled with air. When the sand particles are wet, the air in the spores is replaced with water. Sand is filled with pores that enable it to absorb water. The absorbency of the sand, or the water holding capacity, depends on the texture of the grains.

en.wikipedia.org/wiki/Claywater_interaction

Clay-water interaction is an all-inclusive term to describe various progressive interactions between clay minerals and water. In the dry state, clay packets exist in face-to-face stacks like a deck of playing cards, but clay packets begin to change when exposed to water.

chemistry.stackexchange.com/.../50097/does-clay-absorb-water-because-of-polarity

Between them, water keeps clay from forming a full lattice of $\ce{SiO4^{2-}}$. What I am wondering is, does clay absorb the water because of the water's polarity, i.e. are water molecules bonding with hydrogen bonds to the negatively charged oxygen atoms of the ceramic sheets?

www.sunset.com/garden/garden-basics/know-your-soil

Sandy soils absorb water quickly without puddling. Compared with plants growing in clay soils, those in sandy soils need water more often, but since water penetrates sandy soils faster, you don’t need to apply as much. In sandy soils, irrigate more frequently, but don’t apply so much water that it will flow through the root zone without ...

www.reference.com/science/soil-absorbs-water-quickly-1c04d0864c81d221

Although clay soils absorb water at a slower rate in comparison to sandy soils, plants being grown in clay soils require less watering. Water must be applied slowly in order toensure that it doesn't run off before it is absorbed. Loam soils absorb water at a more even pace without issues of heavy puddling or runoff.

www.gardendesignexposed.com/heavy_clay_soils.html

Soils are composed of three major types of matter. Sand, the first of these, has large particles, usually rough shaped, which do not absorb water well. Silt, the second type of soil matter, has medium sized particles which absorb water, but do not retain it for long periods of time.