2021 Erosion New South Wales

This farm is located northwest of Wentworth, with very low rainfall and high kangaroo pressure during drought.

New South Wales, Calcareous Soil

2021 Erosion NSW Calcareous Soil
Ortho mosaic

Calcareous Soil is described as the poor calcareous loam that grows very poorly in dry years and is very prone to wind erosion. Autumn monitoring showed a residue height of 25cm, ground cover of 32% and dry aggregate of 48% with a low risk of erosion

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New South Wales, Low Graze Intensity

2021 Erosion NSW Low Graze

Low Graze Intensity is a sandy loam rise at the north end of the paddock that would have attracted the least amount of grazing since harvest. During the drought years kangaroos came through from the north baring out this area and contributing to the erosion. It is intended to compare this with site 4. High Graze Intensity which is on a similar soil type, but in an area of higher sheep activity. Autumn monitoring showed a residue height of 28cm, ground cover of 69% and dry aggregate of 22% with a low risk of erosion

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New South Wales, Eroded Mid Slope

2021 Erosion NSW Eroded Mid Slope

Eroded Mid Slope is an exposed mid slope that has lost topsoil down to a clay base, resulting in very patchy crop growth in 2020. This means that it has a high dry aggregation, but not for the right reasons. The farmer is looking to drag some sand back over this site to be able to re-establish crop growth. Autumn monitoring showed a residue height of 6cm, ground cover of 14% and dry aggregate of 66% with a low risk of erosion

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New South Wales, Low Graze Intensity

2021 Erosion NSW High Graze

High Graze Intensity is within the same paddock but at the south eastern corner near a trough, thus attracting far more grazing activity since crop harvest on this sandy loam area. Autumn monitoring showed a residue height of 20cm, ground cover of 59% and dry aggregate of 17% with a low risk of erosion

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Acknowledgments

This project “Practical tactics to improve ground cover and ensure soil preservation following successive low rainfall seasons” (MSF2010-002SAX) has been funded by GRDC.

Thank you to our landholder collaborators Ben Pollard, NSW, and Chris Hunt, VIC, for their time and input. 

2021 Erosion Victoria

This farm is located west of Merbein South in the Millewa.

Victoria, Grazed and Ungrazed

2021 Erosion Victoria Grazed and Ungrazed

1. Grazed is a sandy loam which was bare through 2019, but established a crop in 2020 and where electric fencing was used to protect the eastern side of the paddock from grazing. 2. Ungrazed is a sandy loam on the western grazed side of the paddock directly adjacent to 1. Grazed. Autumn monitoring showed 1. Grazed with a residue height of 9cm, ground cover of 63% and dry aggregate of 25% with a low risk of erosion and 2. Ungrazed with a residue height of 1cm, ground cover of 13% and dry aggregate of 19% with a high risk of erosion

1. Ungrazed
2. Grazed

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Victoria, Flat Calcareous Soil

2021 Erosion Victoria Flat Calcareous Soil

Flat Calcareous Soil is a poor calcareous sandy loam flat that blew through 2018 and 2019 but established crop in 2020. Being near sheep feeders it has attracted reasonable grazing pressure and sheep tracks. Autumn monitoring showed 3. Flat Calcareous Soil with a residue height of 1cm, ground cover of 13% and dry aggregate of 19% with a low risk of erosion

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Victoria, Sandy Soil

2021 Erosion Victoria Sandy Soil

Sandy Soil or Sandy Loam during Autumn monitoring showed 4. Sandy Soil with a residue height of 11cm, ground cover of 47% and dry aggregate of 22% with a low risk of erosion

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Acknowledgments

This project “Practical tactics to improve ground cover and ensure soil preservation following successive low rainfall seasons” (MSF2010-002SAX) has been funded by GRDC.

Thank you to our landholder collaborators Ben Pollard, NSW, and Chris Hunt, VIC, for their time and input.