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The Soil Water Debate I Know I Do Not Know. Soil Pedology Effect of increasing rainfall on a soil sequence in NSW (From Koppi 1990).

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Presentation on theme: "The Soil Water Debate I Know I Do Not Know. Soil Pedology Effect of increasing rainfall on a soil sequence in NSW (From Koppi 1990)."— Presentation transcript:

1 The Soil Water Debate I Know I Do Not Know

2 Soil Pedology Effect of increasing rainfall on a soil sequence in NSW (From Koppi 1990).

3 Rainfall Characteristics North Ryde Jun 07 – Feb 08 pHuS/mRainfall (mm) Average Average Dev Median Min Max Count

4 Soil Physics

5 Soil Water Hysteresis Conceptual and Parametric Representation of Soil Hydraulic Properties: A Review. Shmuel Assouline * and Dani Or. VZJ Vol. 12 No. 4

6 Soil Moisture Calculation Moisture Content Camden Boree DescMeasureSoil 1 Soil 2 Moisture Content ( Thea G ) Bulk Densityg cm

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9 SOIL CHEMISTRY Electrical Conductivity Method Of Measurement – or What are we Measuring ECe EC 1:5 ECw EC app EC1:1 EC 1:2

10 Soil Chemistry Osmotic potential -0.36* (mmho/cm)   (Osmotic potential) bar Range 3-30mmhos Total Cations or Anions from EC Total Cations or Anions (mEq/l)  10*EC(mmho/cm) Total Dissolved Salts (mg\l)from EC TDS(mg/l)  0.64 *EC(mmho/cm) Formula for EC to Osmotic pressure, Total Cations and TDS. From Bresler, et al 1982

11 Other Debate POINTS Thank you


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