1. Directly Measured Soil Properties
2. Salinity (and nutrients Halvorson and Rhoades (1976); Rhoades et al.
3. e.g. NO 3 ) (1976); Rhoades and Halvorson (1977); de Jong
4. etal (1979); Cameron et al. (1981); Rhoades and
5. Corwin (1981 1990); Corwin and Rhoades (1982