Classification and Use of Irrigation Waters

acre-foot of water adsorption-ratio alkali hazard ALKALI SOILS anions average conditions Avocado Bell pepper bicarbonate boron Ca+++Mg++ calcium and magnesium calcium plus magnesium chloride classes classification of irrigation concen concentrations are expressed conductivity values cubic foot Date palm defined diagram Dissolved solids drainage EATON electrical conductivity equivalent weight evaporation exchangeable sodium alkali expressed in milliequivalents gypsum harmful levels high salinity illus ionic concentrations irrigation water leaching requirement levels of exchange mho/cm micromhos milliequivalents per liter MILLIGRAM million miner's inches natural waters Nitrate nomogram percent permeability plants Potassium proportion of sodium rainfall RESIDUAL SODIUM CARBONATE root zone SALINE AND ALKALI salinity control Salinity Laboratory salt tolerance SAR value satisfactory saturation extract sensitive crops sodium carbonate RSC sodium hazard sodium ions SODIUM-ADSORPTION-RATIO SAR soil solution soil water Soluble sodium concentration suitable for irrigation sulfate tion Total cation concentration toxic United States Salinity value indicates water containing water for irrigation WATER SAMPLE