In article ,
" wrote:

03 Dec 2007,Billy in
.
au:


Will you please support your assertion.


sand and clay
and straw, dung or other fibrous materials, which is shaped into bricks
using frames and dried in the sun.
= adobe.

but enough of an intermediate particle size should prevent that.

besides all this, some plants prefer sand, some prefer clay, etc.

Hmmmm. If we are talking about landscaping you are completely correct.
If we are talking about vegetable gardens, I would be correct.

Clay holds water and nutrients and binds the soil. Good soil will
encourage bacteria which will exude mucopolysaccharides and
further bind the soil together.

Sand silt clay and you want them in the quantities indicated
above.

practically speaking, existing grades will be destroyed if you haul in huge
amounts of
soils (to meet those percentages). you could haul out similar volume of
existing soil,
but all that hauling gets expen$ive. older houses sometimes have areas with
an extra
inch+ of soil because someone(s) hauled in some "planting mix" This topping
can be
successful for a while if the "planting mix" was brought in for shallow
planting (usually
a sod install).

a similar "technique" that succeeds with some plants is adding a thin layer
of gravel
at the crown.
--

Billy

Bush & Cheney, Behind Bars