Livestock, particularly heavy species such as cattle, can have a number of damaging impacts on soil including compaction, destruction of soil structure (poaching) and loss of vegetation. These impacts can reduce infiltration of water into the soil, resulting in pooling and water logging with consequent impacts of denitrification and nitrous oxide emissions. Soil compaction will also increase the risk of run-off with consequent impacts on water quality and flood risks.
Reduced stocking density will limit soil compaction, thereby facilitating more rapid infiltration during precipitation events and potentially reducing peak flows and sediment runoff. There may also be issues due to management decisions which can increase risks due to livestock without changing stocking levels. For example increased out-wintering of cattle to avoid housing costs will exacerbate risks due to the increased vulnerability of soils during the winter months. The measure may be effectively achieved by moving grazing livestock from high risk areas or by increasing the use of housing. Whether the reduction in pressure is achieved through direct reductions in stocking density, movement from high risk areas or housing, there will be impacts on farm business in terms of direct or opportunity costs.
Sheep separated to reduce stocking density
Source: http://www.evergraze.com.au/library-content/long-term-phosphate-trial/
Benefits | Level |
---|---|
BP2 - Slow runoff
|
High
|
BP10 - Reduce erosion and/or sediment delivery
|
Medium
|
BP11 - Improve soils
|
Medium
|
ES6 - Groundwater/aquifer recharge
|
Low
|
ES7 - Flood risk reduction
|
Medium
|
ES8 - Erosion/sediment control
|
Medium
|
ES9 - Filtration of pollutants
|
Medium
|
PO3 - Improving status of hydromorphology quality elements
|
Medium
|
PO7 - Prevent surface water status deterioration
|
Medium
|
PO9 - Take adequate and co-ordinated measures to reduce flood risks
|
Medium
|
PO11 - Better protection for ecosystems and more use of Green Infrastructure
|
Medium
|
PO12 - More sustainable agriculture and forestry
|
Low
|
PO14 - Prevention of biodiversity loss
|
Low
|