DEFINITION OF SOIL ORGANIC MATTER
By Jerzy Weber
Humus content of soil
Humus content in soils fluctuating in broad range. On humus content have influence the following factors:
- amount and quality of humus, which get at soil in given bioecological zone
- tempo of humification process of organic matter
- tempo of mineralization of humus, which is contain in soil
- chemical, physico-chemical and physical soil properties
- amount and quality of mineral compounds contained in soil
| Humus content in accumulation horizons of the main soil units in Poland (Turski 1996) |
|---|
| Division and order |
Type,genera and kind |
Humus content % |
| Calcisols: |
Calcarious Rendzinas |
3.4 |
| 2.1 - 6.3 |
| 4.4 |
| Jurasic Rendzinas |
1.5 - 7.0 |
| Phaeozems: |
Haplic Phaeozems |
2.8 |
| 1.8 - 4.0 |
| Cambisols: |
Brown soils formed from sands |
1.5 |
| 0.9 - 2.2 |
| Brown soils formed from light and medium loams |
1.8 |
| 1.1 - 3.0 |
| Brown soils formed from heavy loam |
2.5 |
| 1.6 - 3.7 |
| Brown soils formed from silt formations |
1.7 |
| 1.3 - 1.9 |
| Brown soils formed from loess and loesslike materials |
1.9 |
| 1.4 - 2.6 |
| Luvisols: |
Grey brown soils formed from silt formations |
1.9 |
| 1.4 - 2.4 |
| Grey brown soils formed from loess and loesslike materials |
1.8 |
| 1.0 - 2.5 |
| Grey brown soils formed from light loam |
1.6 |
| 1.0 - 2.6 |
| Podzols: |
Podzolic soil formed from sands |
1.5 |
| 1.1 - 2.0 |
| Gleysols: |
Boggy soils formed from silts |
1.6 |
| 1.2 - 2.1 |
| Gleysols: |
Black earth formed from sands |
2.8 |
| 1.2 - 4.1 |
| Black earth formed from light and medium loams |
2.6 |
| 1.2 - 5.7 |
| Black earth formed from heavy loams and clays |
4.9 |
| 2.5 - 5.6 |
| Fluvisols: |
Alluvial soils formed from sands |
2.9 |
| 1.5 - 5.2 |
| Alluvial soils formed from silts |
3.5 |
| 1.7 - 5.8 |
| Alluvial soils formed from clays |
4.2 |
| 2.4 - 6.8 |
