Reich says that while clay holds nutrients well, most clay soils start out low in them. So if you’re digging a new bed, he recommends adding granular organic fertilizer to cheaply provide a ...

Topsoils often have a granular structure that allows water to drain rapidly. Soils with high clay content usually have a blocky, chunky structure where water drains moderately well.

Soil consists of a mixture of sand, silt, and clay particles, along with organic matter. As part of the soil test, Heilig says, have a soil-texture test run to show what you're dealing with.

Still, if you have particularly clay-filled soil and want to break it up, adding perlite or vermiculite can help, if it is incorporated into the soil well, in amounts varying from 10-50%.

Soils with a high clay content have high CEC values. ... This is difficult to make happen in sandy soil because the relatively large space between soil granules contains lots of air, ...

The graph below shows the total number of publications each year in Internal Erosion and Seepage Flow in Granular Soils. References [1] Impact of clay particle reattachment on suffusion of sand ...