IX. Other Gamma Radiation Methods for Determining Soil
 Water Content and Bulk Density ..................... 36
 X. Summary and Conclusions .................. ....... 37
 XI. References Cited ................................. 39
XII. Appendices ...................................... 45
 Appendix A. Mathematical Equations for Soil Water
 Content (0) and Bulk Density (p) Determinations
 Using the Monoenergetic Gamma-Ray
 Attenuation Method ........................... 46
 Appendix B. Mathematical equations for Soil Water
 Content (0) and Bulk Density (p) Determinations
 Using the Dual-Energy Gamma Attenuation Method .. 47
 Appendix C. Mathematical Description of Experimental
 Errors Associated with Determinations of Soil Water
 Content (0) and Bulk Density (p) by Gamma-Ray
 Attenuation Methods ........................... 47
 Appendix D. Theoretical Consideration of the Accuracy and
 Precision of Water Content and Density
 Determinations of Soil by the Dual-Energy
 Gamma Attenuation Method ............ ....... 50