List of Figures
Fig. 2.1: Nomogram for the determination of the SAR-value (Sodium Adsorption Ratio) from the Na- and Ca+Mg concentrations of the water sample and the associ- ated ESP (Exchangeable Sodium Percentage) after USDA Handbook 60 (1954)
Fig. 2.2: Classical Diagram to evaluate Sodium (Alkali) Hazard in relation to the Salinity Hazard according to USDA Handbook 60 (1954)
Fig. 2.3: Evaluation of Na-damage to soil physical properties after WILCOX
Fig. 2.4: Modified Nomogram for the determination of the SARMg-adj from the Na- and Ca- concentrations of the water sample
Fig. 2.5: Relation between capillary flow velocity and depth of groundwater table for a suction of -1.6 MPa (=PWP) at the surface (after van Hoorn, 1979)
Fig. 2.6: Capillary rise of groundwater to root zone in mm/day for different groundwater depths and soil textures under moist conditions (soil water tension of root zone about -0.05MPa = 0.5 bar)
Fig. 3.1: Full Working Programme for Analysis of Soil Samples with the 'SALINITY AND SOIL FERTILITY KIT'
Fig. 3.2: Manual classification of soil texture
Fig. 3.3: Sodium Diagram after WILCOX
Fig. 3.4: Classical nomogram for determining the SARse-value of a soil saturation extract and estimating the ESPse-value of soil at equilibrium with the extract
Fig.3.5: For Salt-Sensitive Crops; SAND: EC and osmotic water potential of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.6: For Salt-Sensitive Crops; LOAM: EC and osmotic water potential of soil solutions calculated from the effective salinity of the 1/2-extract
Fig.3.7: For Salt-Sensitive Crops; LOAMY SAND: EC and osmotic water potential of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.8: For Salt-Tolerant Crops; SAND: EC and osmotic water potential of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.9: For Salt-Tolerant Crops; LOAM: EC and osmotic water potential of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.10: For Salt-Tolerant Crops; LOAMY SAND: EC and osmotic water potential of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.11: For Halophytes; SAND: EC and osmotic water potentials of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.12: For Halophytes; LOAM: EC and osmotic water potentials of soil solution calculated from the effective salinity of the 1/2-extract
Fig.3.13: For Halophytes; LOAMY SAND: EC and osmotic water potentials of soil solution calculated from the effective salinity of the 1/2-extract
Fig. 3.14: Principle Scheme on the Concept of Plant Water Supply as Affected by the Total or Soil Matric Water Potential
Fig. 3.15: Water Uptake of Wheat from a Sandy and a Loamy Soil at Decreasing Soil Matric Water Potentials
Fig. 3.16: Water Uptake of Rape Plants in Relation to the Soil Water Potential from a Non-Saline and a Saline Sandy Soil
Fig. 3.17: Water Supply of Wheat Plants in Relation to the Soil Water Potential of Non-Saline and Saline Sandy and Loamy Soils
Fig. 3.18: Soil Amelioration through Surface Desalination
Fig. 3.19: Principles of Salt and Water Dynamic Processes in the Rhizosphere of Irrigated Crops and the Effects on the Shoot Water Supply
Fig. 3.20: Salt Dynamic Processes in the Rhizosphere of Irrigated Crops and their Effect on the Crop Salt-Tolerance
Fig. 3.21: Relationship between pH and solubility of various forms of Aluminium