Temporal patterns of infiltration into a water repellent soil under field conditions Phil Ward, Margaret Roper, Ramona Jongepier and Shayne Micin April 28, 2014 PLANT INDUSTRY / SUSTAINABLE AGRICULTURE FLAGSHIP
Temporal patterns of infiltration into a water repellent soil under field conditions
Feb 22, 2016
Temporal patterns of infiltration into a water repellent soil under field conditions. Plant Industry / Sustainable Agriculture flagship. Phil Ward, Margaret Roper, Ramona Jongepier and Shayne Micin. April 28, 2014. Water repellency in south-western Australia. Hopetoun. DAFWA: agric.wa.gov.au. - PowerPoint PPT Presentation
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Temporal patterns of infiltration into a water repellent soil under field conditionsPhil Ward, Margaret Roper, Ramona Jongepier and Shayne MicinApril 28, 2014
PLANT INDUSTRY / SUSTAINABLE AGRICULTURE FLAGSHIP
Water repellency in south-western Australia
Infiltration into water repellent soil| Phil Ward
HopetounDAFWA: agric.wa.gov.au
0
50
100
150
0
10
20
30RainfallET0Max TempMin Temp
Rainfallor ET0(mm)
Temperature(°C)
Climate averages 1981-2010
Infiltration into water repellent soil| Phil Ward
Landscape
Infiltration into water repellent soil| Phil Ward
• Zero-till versus full cultivation• Residue retained versus residue burnt• 4 replicates• Tillage and burning: 12 April 2011 and 15 April 2012• Seeding 21 April 2011 (canola), and 14 May 2012 (wheat)• Plot size 12 m x 20 m• Crops sown between rows of previous crop – 30 cm row spacing• Measurements:
• Soil carbon and water repellency (MED) ~ 6 times per year• Soil water content 0-12 cm ~ 6 times per year• Soil water content at 5 cm, at 15-minute intervals, in two replicates.
Trial details 2011 (canola) - 2012 (wheat)
Infiltration into water repellent soil| Phil Ward
16 plots,commenced in 2008
Treatment MED
No-Till, residue retained 1.5
Conventional cultivation, residue retained 1.4
No-Till, residue burnt 1.6
Conventional cultivation, residue burnt 1.0
LSD 0.3
Soil water repellency 0-5 cm – Feb 2013at the conclusion of the experiment
Infiltration into water repellent soil| Phil Ward
TDR, in crop row and inter-row positions
Infiltration into water repellent soil| Phil Ward
Residue burnt, soil cultivated
Residue retained, zero-till
All the data...
Infiltration into water repellent soil| Phil Ward
08 Jun 11 12:00
02 Jul 1
1 12:00
26 Jul 1
1 12:00
19 Aug 11 12:00
12 Sep 11 12:00
06 Oct 11 12:00
30 Oct 11 12:00
23 Nov 11 12:00
17 Dec 11 12:00
10 Jan 12 12:00
03 Feb 12 12:00
27 Feb 12 12:00
22 Mar
12 12:00
15 Apr 12 12:00
09 May
12 12:00
02 Jun 12 12:00
26 Jun 12 12:00
20 Jul 1
2 12:00
13 Aug 12 12:00
06 Sep 12 12:00
30 Sep 12 12:00
0
0.1
0.2
0.3
0.4
0.5
Soilwater
content(v/v)
Approx. crop lower limit
Approx. drained upper limit
July 28, 2011 – rain on wet soil7.8 mm
Infiltration into water repellent soil| Phil Ward
10:00:00 PM 11:00:00 PM 12:00:00 AM0
0.1
0.2
0.3
Inter-row
NT RetCT RetNT BurnCT Burn
Soilwater(v/v)
Approx. crop lower limit
Approx. crop lower limit
10:00:00 PM 11:00:00 PM 12:00:00 AM0
0.1
0.2
0.3
0
3
6
9Crop row
NT RetainCT RetainNT BurnCT BurnRainfall
Soilwater(v/v)
Total DS (mm)
7.3
7.1
6.1
6.2
June 7, 2012 – dry(ish) soil7.0 mm
Infiltration into water repellent soil| Phil Ward
03:00:00 AM 04:00:00 AM 05:00:00 AM 06:00:00 AM 07:00:00 AM0
0.05
0.1
0.15
0.2
Inter-rows
NT RetainCT RetainNT BurnCT Burn
Soilwater(v/v)
03:00:00 AM 04:00:00 AM 05:00:00 AM 06:00:00 AM 07:00:00 AM0
0.05
0.1
0.15
0.2
0
2
4
6
8
Crop rows
NT RetainCT RetainNT BurnCT BurnRainfall
Soilwater(v/v)
Total DS (mm)
6.0
2.2
4.9
4.5
October 2, 2011 – canola11.2 mm
Infiltration into water repellent soil| Phil Ward
07:00:00 PM 08:00:00 PM 09:00:00 PM0
0.1
0.2
0.3
Inter-rows
NT RetainCT RetainNT BurnCT Burn
Soilwater(v/v)
07:00:00 PM 08:00:00 PM 09:00:00 PM0
0.1
0.2
0.3
0
3
6
9
Crop rows
NT RetainCT RetainNT BurnCT BurnRainfall
Soilwater(v/v)
Total DS (mm)9.36.45.84.7
September 27, 2012 – wheat13.0 mm
Infiltration into water repellent soil| Phil Ward
03:00:00 PM 04:59:59 PM 06:59:59 PM 08:59:59 PM 10:59:59 PM0
0.05
0.1
0.15
0.2Inter-rows
NT RetainCT RetainNT BurnCT Burn
Soilwater(v/v)
03:00:00 PM 04:59:59 PM 06:59:59 PM 08:59:59 PM 10:59:59 PM0
0.05
0.1
0.15
0.2
0
2
4
6
8Crop rows
NT RetainCT RetainNT BurnCT BurnRainfall
Soilwater(v/v)
Total DS (mm)
6.8
3.2
5.1
5.8
March 19, 2012 – rain on dry soil7.2 mm
Infiltration into water repellent soil| Phil Ward
01:00:00 AM 02:59:59 AM 04:59:59 AM 06:59:59 AM0
0.05
0.1
0.15
0.2
Inter-row
NT RetCT RetNT BurnCT Burn
Soilwater(v/v)
01:00:00 AM 03:00:00 AM 04:59:59 AM 06:59:59 AM0
0.05
0.1
0.15
0.2
0
2
4
6
8Stubble row
NT RetainCT RetainNT BurnCT BurnRainfall
Soilwater(v/v)
Total DS (mm)8.14.17.94.3
• On wet soils, residue and tillage treatments have little effect on patterns of infiltration.
• Infiltration into dry WR sand is affected in both timing and magnitude by previous soil disturbance and arrangement of vegetation
• Tillage destroys previous preferred pathways and can perturb infiltration patterns for at least 11 months.
• Accounting for rainfall can be used as a measure of field expression of water repellence
• Tillage in agricultural crop production should be carefully managed in water repellent sands.
Conclusions
Infiltration into water repellent soil| Phil Ward
Thank you
PLANT INDUSTRY / SUSTAINABLE AGRICULTURE FLAGSHIP
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