Root Cause Analysis
Treating the symptom can lead to the initial problem reoccurring and many cases worse. It is important to identify the root cause of the problem and treat it accordingly. This is called Root Cause Analysis (RCA) from the business school of hard knocks. RCA is the quality management process by which an organisation searches for the root of a problem, issue or incident after it occurs. While it may be tempting to simply address symptoms of the problem as they materialise, addressing symptoms is an inherently reactive process that all but guarantees a recurring—and often worsening—series of problems- lead to high costs/high risk/low return on investment. Root cause analysis helps organizations decipher the root cause of the problem, identify the appropriate corrective actions, and develop a plan to prevent future occurrences. It aims to implement solutions to the underlying problem for more efficient operations overall
Example of a Symptom within a Box Gum Grassy Woodland:
Regrowth of woody weeds/trees/bush driving the decline in health and economic agriculture production and natural capital
Example of Cause: High Disturbance
High Disturbance in a Box Gum Grassy Woodland can be caused from tree clearing, regrowth clearing, hot season lightning strike fires, overgrazing &/or under grazing, over stocking from wildlife & domestic livestock & feral animals.
Within five years after high disturbance, land condition & landscape function decline, hundreds of small seedlings per hectare can grow into a much worse problem than the original open woodland or woodland. Once the mature mother trees are killed, eucalypt saplings start to grow and new seedlings establish. At the same time, suppressed sandalwood, wattles, limebush and cypress pine start growing. False sandalwood may grow slowly (about 30 cm a year), and does not become a real problem for 5-6 years, but the other species can grow to 1.5 m in a good year. If the soil has been disturbed by pulling, seed of many species may germinate. Seeds of currant bush, whitewood, sandalwood, cypress pine and wattles may have been lying in the soil, while seeds of rubber vine and bitlerbark can blow in from nearby frontage country.
Longer term problems with high disturbance
- Biodiversity. Land loses its ability to keep
nature in some sort of harmony. Without this balance and all of all interconnections
your land is potentially subject to degradation and loss
of future productivity.
- Erosion. Box trees frequently grow on solodic soils. Pulling trees or cultivating deeply afterwards can expose the dispersable subsoil to rain water, resulting in severe gully or tunnel erosion.
- Salinity. Clearing ridges with permeable soils can cause salinity to break out on toe slopes or adjacent flats.
Once the surface soil is saline, all production will be lost. Woody weeds and regrowth. Seedlings and root suckers of trees and shrubs keep growing larger every year.
.To achieve a high Return On Your Investment (time, money) in a Healthy Box Gum Grassy Woodland
Questions need to be asked in direction to take. Is it ecologically sound, economically viable, and socially responsible
Healthy box gum grassy woodlands typically have widely spaced trees (30–40/ha) with a grassy ground cover that includes a stunning diversity of productive perennial native grasses, forbs (wildflowers), sedges and organic litter and all combine to consist 70 to 100% ground cover.
The number
of trees will likely be lower where annual rainfall is below 500 mm and higher where rainfall is above 500 mm. Tree crowns in woodlands typically shade 20–75 per cent of the ground at midday, and trees may reach 30 m tall.
Valuing the Benefits of trees which are often overlooked
Livestock Production
Livestock production may be slightly higher under a light
tree canopy in higher rainfall districts where there is
less competition for water. Shaded green grass may be
more digestible, and the grazing stock may suffer less
heat stress in summer. The grass will be protected from
light frosts in winter; minimum temperatures can be
2 degree celsius higher under living trees
Some plant nutrients may be cycled from greater soil
depth by the tree roots, but the overall effect of this on
pasture growth is minimal. However, soil microorganisms
are more active in cooler, shaded soil and
these can improve soil structure and infiltration rates.
Trees for shelter belts or stock camps should always
be retained-even on your best country.
Biodiversity
Large, old trees and standing dead trees are unique and irreplaceable features of our landscapes. Termed ‘habitat trees’, they provide numerous living places and other resources for many kinds of animals and plants. Habitat trees have lots of hollows, cracks and crevices of various sizes, where animals may live, breed or shelter. This is now seen as an important economical value to farmers as can be rewarded economically via Land Stewardship Biodiversity Credits via Land Restoration Fund and linked to carbon farming such as soil carbon and tree carbon projects
Learning From History
Before undertaking clearing tactics it is a good strategy to get all intelligence in, local knowledge in of past history of:- site, nearby neighbours properties, road side reserves, state & national parks:
- Recent two centuries time period of tree clearing, management, country use, vegetation, soil conditions and climate data.
- Pre European state of country, vegetation condition, soil conditions and indigenous management
- Pre human period investigations of country of how these plants functioned, how these plants evolved with animals and climate period
Treating the cause
We recommend not spend so much money pulling a large area or thinning that
you cannot afford to manage the regrowth that is sure to come.
Develop only an area that you can look after.
We highly recommend after initial investment in tree clearing is to follow, with the most important investment which is treating a major cause with high level of grazing management such as:
Landscape Function Grazing Management
Few quick critical points to Landscape Function:
a), Root Driven Recovery, Long Pasture Recovery of 12 to 15 months.
c), Ultra High Stock Density, High Pasture Utilisation - Non-Selective Grazing - High herd Effect
see section on Landscape Function Grazing for more details in Landscape Function chapter
Regenerative Grazing Australia
www.regenerativegrazingaustralia.com.au