1. The Soil Water Debate
I Know I Do Not Know

2. Soil Pedology
1. What is the accumlative effect of rainfall and irrigation in Mega litres equilavents and the effect upon crops / soil formation
Effect of increasing rainfall on a soil sequence in NSW (From Koppi 1990).

3. Rainfall Characteristics North Ryde Jun 07 – Feb 08pH
uS/m
Rainfall (mm)
Average
5.5
78.1
12.7
Average Dev
0.6
85.8
8.8
Median
20.0
8.0
Min
3.0
0.0
2.0
Max
7.9
1371.0
51.0
Count
85.0
67.0

4. Soil Physics

5. Soil Water Hysteresis
Effect on irrigation scheduallinng – ET and TDR also on water movement
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
Desc
Measure
Soil 1
Soil 2
( Thea G )
0.18
0.09
0.07
Bulk Density
g cm
1.39
1.3
1.34
1.19

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