"sherwin dubren" wrote in message
FarmI wrote:

Why do you make a distinction between leaf mold and compost? Aren't
they the same thing?

No, they aren't the same thing even though compost may have some leaves
included in it.

Leaf mould is made by piling leaves and then letting the pile rot down
for a couple of years without disturbance.

My leaf piles in compost bins take only one year to process. I do not
add any enhancers to them, except for water. It is key to keep these
leaf piles damp, as I can see dry portions never cooking. It is also
important that they are chopped up. Otherwise, they mat together and
this also prevents decomposition.

Leaves have lignin in them

My checking on the web says that stems and wood contain more lignin
than leaves, so I don't think this is the reason for them taking so
long to break down.

and thus
they take a long time to rot and, unlike compost, it is a cold rotting
process rather than a hot one.

Now, my compost piles have some grass clippings in them, so this may
account for the fact that they get nice and hot, even steamy on colder
days. However, I have seen recommendations of 2 parts of grass to
every part of leaves for a pile. In my case, I think the grass is
than 10 percent of the total, but everything cooks just fine in one
year.

Leaves decompose by using fungal
decompostition IIRC whereas compost is made by bacterial decomposition
(again, IIRC).

Leaf mould is valuble as the end result of decayed material is more
durable in the soil than 'normal' compost (because of the lignin).

From what I read, lignum is present in all vascular plants, and occurs
in higher amounts in wood than in leaves.

Another difference is that Leaf mould is made of just leaves and compost
is made of a combination of materials and includes a high nitrogen
content which is not present in leaf mould.

Except for processing time, I don't think the nitrogen affects the
plants covered in leaf compost. There are more natural ways the soil
to fixate itself with nitrogen. My experience is that leaves will
break down in a years time, assuming the pile is kept consistently
damp and the leaves are chopped up.

If you are now suddenly an expert on leaf mould then why didn't you know
that compost and leaf mould were two different things? Oh, I forgot,
you're the expert on everything.