Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW

Brendan Scott; Mark Conyers; Burns Helen; Catherine M Evans; Neil Fettell

Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW

Brendan Scott, Mark Conyers, Burns Helen, Catherine M Evans, Neil Fettell

Research output: Book chapter/Published conference paper › Conference paper › peer-review

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Abstract

We examined two long term experiments and two paddock surveys and identified large changes in soil pHCa within the surface 20 or 30 cm of soil. The 5-15 cm was the most acidic layer in most soils; this suggests that soil sampling in the 0-10 cm and 10-20 cm depths is inadequate to describe what the plant may experience. The sharp pHCa changes within the 0-10 cm layer were modified by surface application of some N fertilisers, which acidified the normally less acidic 0-5 cm soil. Liming in a no-till system increased the soil pHCa in the shallow surface and the decrease in soil pH from 0-5 cm to 5-10 cm was even greater than in an unlimed soil. Initially, soil pH testing in finer depth layers in some paddocks should be informative. A regular liming program, with strategic cultivation to incorporate lime more deeply and thoroughly, could be considered.

Original language	English
Title of host publication	Proceedings of the 18th Australian Agronomy Conference 2017
Subtitle of host publication	Doing More With Less
Editors	Garry J O’Leary, Roger D Armstrong, Liz Hafner
Place of Publication	Australia
Publisher	Australian Society of Agronomy
Pages	1-4
Number of pages	4
Publication status	Published - 2017
Event	18th Australian Agronomy Conference 2017 - Mercure Ballarat Hotel & Convention Centre, Ballarat, Australia Duration: 24 Sept 2017 → 28 Sept 2017 https://web.archive.org/web/20170720070459/http://www.agronomyconference.com/ (Conference website) http://www.agronomyaustraliaproceedings.org/index.php/2017 (Conference proceedings)

Conference

Conference	18th Australian Agronomy Conference 2017
Abbreviated title	Doing more with less
Country/Territory	Australia
City	Ballarat
Period	24/09/17 → 28/09/17
Other	The 18th Australian Agronomy Conference will be held at the Mercure Ballarat Hotel and Convention Centre, Victoria from 24-28 September 2017. The Australian Agronomy Conference is the meeting place for Agronomists; it supports research and the community of Agronomists by connecting Agronomy communities across Australia to each other. The theme for the 2017 conference is “Doing more with less”. A central plank of Australia’s productive output is agriculture, worth over AUD$13.6 billion exported annually. Agronomy is key to ensuring that farmland is productive across Australia’s diverse landscapes. Innovation in machinery and precision technologies, plant species and varieties, soil and plant management may allow the agronomist of today to successfully help agricultural producers thrive. These innovations are timely as the world deals with increasingly variable climates, environmental degradation, and a more developed global community that requires more diverse products from agriculture.
Internet address	https://web.archive.org/web/20170720070459/http://www.agronomyconference.com/ (Conference website) http://www.agronomyaustraliaproceedings.org/index.php/2017 (Conference proceedings)

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Scott, B., Conyers, M., Helen, B., Evans, C. M., & Fettell, N. (2017). Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW. In G. J. O’Leary, R. D. Armstrong, & L. Hafner (Eds.), Proceedings of the 18th Australian Agronomy Conference 2017: Doing More With Less (pp. 1-4). Australian Society of Agronomy. http://agronomyaustraliaproceedings.org/images/sampledata/2017/48_ASA2017_Burns_Helen_Final.pdf

Scott, Brendan ; Conyers, Mark ; Helen, Burns et al. / Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW. Proceedings of the 18th Australian Agronomy Conference 2017: Doing More With Less. editor / Garry J O’Leary ; Roger D Armstrong ; Liz Hafner. Australia : Australian Society of Agronomy, 2017. pp. 1-4

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title = "Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW",

abstract = "We examined two long term experiments and two paddock surveys and identified large changes in soil pHCa within the surface 20 or 30 cm of soil. The 5-15 cm was the most acidic layer in most soils; this suggests that soil sampling in the 0-10 cm and 10-20 cm depths is inadequate to describe what the plant may experience. The sharp pHCa changes within the 0-10 cm layer were modified by surface application of some N fertilisers, which acidified the normally less acidic 0-5 cm soil. Liming in a no-till system increased the soil pHCa in the shallow surface and the decrease in soil pH from 0-5 cm to 5-10 cm was even greater than in an unlimed soil. Initially, soil pH testing in finer depth layers in some paddocks should be informative. A regular liming program, with strategic cultivation to incorporate lime more deeply and thoroughly, could be considered.",

keywords = "Cropping, pastures, pH stratification, soil testing",

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publisher = "Australian Society of Agronomy",

note = "18th Australian Agronomy Conference 2017, Doing more with less ; Conference date: 24-09-2017 Through 28-09-2017",

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Scott, B, Conyers, M, Helen, B, Evans, CM & Fettell, N 2017, Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW. in GJ O’Leary, RD Armstrong & L Hafner (eds), Proceedings of the 18th Australian Agronomy Conference 2017: Doing More With Less. Australian Society of Agronomy, Australia, pp. 1-4, 18th Australian Agronomy Conference 2017, Ballarat, Victoria, Australia, 24/09/17. <http://agronomyaustraliaproceedings.org/images/sampledata/2017/48_ASA2017_Burns_Helen_Final.pdf>

Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW. / Scott, Brendan; Conyers, Mark; Helen, Burns et al.
Proceedings of the 18th Australian Agronomy Conference 2017: Doing More With Less. ed. / Garry J O’Leary; Roger D Armstrong; Liz Hafner. Australia: Australian Society of Agronomy, 2017. p. 1-4.

Research output: Book chapter/Published conference paper › Conference paper › peer-review

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AU - Scott, Brendan

AU - Conyers, Mark

AU - Helen, Burns

AU - Evans, Catherine M

AU - Fettell, Neil

PY - 2017

Y1 - 2017

N2 - We examined two long term experiments and two paddock surveys and identified large changes in soil pHCa within the surface 20 or 30 cm of soil. The 5-15 cm was the most acidic layer in most soils; this suggests that soil sampling in the 0-10 cm and 10-20 cm depths is inadequate to describe what the plant may experience. The sharp pHCa changes within the 0-10 cm layer were modified by surface application of some N fertilisers, which acidified the normally less acidic 0-5 cm soil. Liming in a no-till system increased the soil pHCa in the shallow surface and the decrease in soil pH from 0-5 cm to 5-10 cm was even greater than in an unlimed soil. Initially, soil pH testing in finer depth layers in some paddocks should be informative. A regular liming program, with strategic cultivation to incorporate lime more deeply and thoroughly, could be considered.

AB - We examined two long term experiments and two paddock surveys and identified large changes in soil pHCa within the surface 20 or 30 cm of soil. The 5-15 cm was the most acidic layer in most soils; this suggests that soil sampling in the 0-10 cm and 10-20 cm depths is inadequate to describe what the plant may experience. The sharp pHCa changes within the 0-10 cm layer were modified by surface application of some N fertilisers, which acidified the normally less acidic 0-5 cm soil. Liming in a no-till system increased the soil pHCa in the shallow surface and the decrease in soil pH from 0-5 cm to 5-10 cm was even greater than in an unlimed soil. Initially, soil pH testing in finer depth layers in some paddocks should be informative. A regular liming program, with strategic cultivation to incorporate lime more deeply and thoroughly, could be considered.

KW - Cropping

KW - pastures

KW - pH stratification

KW - soil testing

UR - http://agronomyaustraliaproceedings.org/index.php/47-2017/757-2017-committee-information

UR - http://agronomyaustraliaproceedings.org/index.php/47-2017/719-2017-foreword-and-sponsors

UR - http://agronomyaustraliaproceedings.org/index.php/2017

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BT - Proceedings of the 18th Australian Agronomy Conference 2017

A2 - O’Leary, Garry J

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T2 - 18th Australian Agronomy Conference 2017

Y2 - 24 September 2017 through 28 September 2017

ER -

Stratification of acidity in the shallow soil surface - experiences in the cropping areas of southern and central NSW

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Conference

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