and predictions of soil organic matter production and litter decomposition. More information: Yunyu Zhang et al, Exchangeable manganese regulates carbon storage in the humus layer of the boreal ...

l), our knowledge of the turn-over of forest soil humus is very incomplete. This is particularly true of the organic matter in soil horizons below the humus layer.

In an average gravel garden, the soil is covered with a fleece or plastic ... they will rot and form a light layer of humus ...

In circumstances where soil has been excavated and reinterred ... They are two burrow holes created by fairly small animals originating in the humus layer and intruding into the shelly layer beneath.

Podzols are easily recognisable by their distinct layers or horizons ... producing an acid humus. The acidic conditions are not liked by soil organisms which would normally merge the boundaries ...

Soil organisms, like earthworms ... The original vegetation was deciduous forest, resulting in a layer of decaying leaves giving a rich humus. The deep roots of these trees reached down to ...