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.

Humus is highly recalcitrant, and this resistance to decomposition leads to a long residence time in soil. Plant debris is less recalcitrant, resulting in a much shorter residence time in soil.

Therefore, the stability of boreal soils is critical to understanding global carbon cycle feedbacks to climate change and soil management. However, the regulating factors of humus carbon ...

Cucumbers grow best in light, permeable soils rich in humus and slightly acidic (pH 6-6.8). You can add peat or compost to the soil to achieve this acidity. The next step is to prepare the soil ...