Changes

'''Humus''' is source of the [[organic]] content in [[soil]].  It consists of the decayed remains of once-living creatures.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc. 2000</ref>

'''Humus''' is source of the [[organic]] content in [[soil]].  It consists of the decayed remains of once-living creatures.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc. 2000</ref>

It is a very important component in the quality of topsoil, as it brings back to plant roots the nutrients they need, and adds to the friability of the soil (it's ability to hold moisture and air).

It is a very important component in the quality of topsoil, as it brings back to plant roots the nutrients they need, and adds to the friability of the soil (its ability to hold moisture and air by not clumping or packing down).

Humus is the end product of [[decomposition]] of dead leaves, wood, and animal matter by smaller and smaller organisms.  Initially, larger creatures tear up the dead matter to obtain whatever food they can (ie, squirrels eating th meat of nuts, scavengers eating meat off carcasses).  Then various [[insect]]s, [[fungi]] and [[bacteria]] start to consume and break down the remaining tissues.  The action of [[earthworm]]s helps work this material below the surface, where it does the most good.

Humus is the end product of [[decomposition]] of dead leaves, wood, and animal matter by smaller and smaller organisms.  Initially, larger creatures tear up the dead matter to obtain whatever food they can (ie, squirrels eating th meat of nuts, scavengers eating meat off carcasses).  Then various [[insect]]s, [[fungi]] and [[bacteria]] start to consume and break down the remaining tissues.  The action of [[earthworm]]s helps work this material below the surface, where it does the most good.