The key aim of this trial is to document and understand the change in soil pH down to a depth of 30cm.
| Lead research organisation |
Liebe Group |
|---|---|
| Host research organisation |
Aglime of Australia |
| Trial funding source | GRDC LIE00008 |
| Related program | N/A |
| Acknowledgments |
The 'Time to Lime' project was a major coordinated research and extension initiative during which time, many of the trials reported upon were initiated, and many organisations contributed:
I acknowledge GRDC project LIE00008, “Working together to deliver multiple benefit messages to growers through a whole systems approach to soil management" |
| Other trial partners | Not specified |
| Crop type | None: No crop specified |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | Not specified |
|---|---|
| Harvest date | Not specified |
| Plot size | 50m x 200m |
| Plot replication | 3 |
| Soil amelioration |
96LG9 is situated on a sandy gravel soil with a pre-demonstration topsoil pH of 4.5, and a subsoil pH of 4.6. Limestone with a neutralising value of 86% was spread in 1996 at three rates (0 t/ha, 1 t/ha, 2 t/ha). By 1999, soil pH had increased by 0.6 pH units at 1 t/ha of lime and by 1.0 pH unit when 2 t/ha of lime was added. |
| Other trial notes |
In 2006, each plot (originally 50m wide by 200m long) was split in two. The western half of each plot received 1.5t/ha, the eastern side of each plot received no additional lime. This data is reported, showing the massive impact of the additional lime application across all the three initial lime treatments.
The cooperating farmers have now also applied another 2t/ha of lime (source unknown) in February 2016 (ie. Post soil sampling reported in this document). There was no other application of lime during the 1996-2016 periods across the trial site. |
| # |
Treatment 1
|
Change in soil pH (pH) | Pre Liming pH (pH) | Mid Season pH (pH) | 0 t/ha Lime rate (pH) | 1 t/ha Lime Rate (pH) | 2 t/ha Lime Rate (pH) |
|---|---|---|---|---|---|---|---|
| 1 | █ 2 t/ha lime 0-10cm | 0.7 | 4.5 | 5.2 | |||
| 2 | █ 2 t/ha lime 10-20cm | 0 | 4.6 | 4.6 | |||
| 3 | █ 2 t/ha lime 20-30cm | 0 | 0 | 5.1 | |||
| 4 | █ 1 t/ha lime 0-10cm | 0.6 | 4.5 | 5.1 | |||
| 5 | █ 1 t/ha lime 10-20cm | -0.1 | 4.7 | 4.6 | |||
| 6 | █ 1 t/ha lime 20-30cm | 0 | 0 | 5.1 | |||
| 7 | █ 1997 Average 0-10 cm | 4.4 | 5.1 | 5.6 | |||
| 8 | █ 1997 Average 10-20cm | 4.5 | 4.5 | 4.6 | |||
| 9 | █ 1997 Average 20-30cm | 4.8 | 4.9 | 5 | |||
| 10 | █ 1998 Average 0-10 cm | 4.4 | 5.1 | 5.6 | |||
| 11 | █ 1998 Average 10-20cm | 4.5 | 4.5 | 4.6 | |||
| 12 | █ 1998 Average 20-30cm | 4.8 | 4.9 | 5 | |||
| 13 | █ 1999 Average 0-10 cm | 4.4 | 5 | 5.4 | |||
| 14 | █ 1999 Average 10-20cm | 4.5 | 4.6 | 4.7 | |||
| 15 | █ 1999 Average 20-30cm | 4.8 | 5.1 | 5.1 | |||
| 16 | █ 2016 Average 0-10 cm | 4.7 | 5.1 | 5.2 | |||
| 17 | █ 2016 Average 10-20cm | 4.6 | 4.7 | 5.2 | |||
| 18 | █ 2016 Average 20-30cm | 4.5 | 5.2 | 5.1 |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to
construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol
16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
