found: Work cat.: 96015906: Sodic soils, 1996.
found: Gloss. soil:Sodic soil (a nonsaline soil containing sufficient exchangeable sodium to adversely affect crop production and soil structure under most conditions of soil and plant type. The lower limit of satuation extract SAR (sodium adsorption rate) of such soils is ... set at 13)
found: Thompson, L.M. Soils and soil fertility, 1979:p. 198 (sodic soils have more than 15 percent of their cation-exchange sites occupied by Na+ ions. They are low in soluable salts ... they have dispersed colloids, very low permeability, and support little or no plant growth)
found: FitzPatrick, E.A. Soils, 1983:p. 114 (sodic: E.C. (electrical conductivity) of saturated extract <4 mmhos cm -1 exchangeable sodium >15 per cent pH>8.5)
found: CAB thes.(sodic soils)
found: Biol. & agr. index:v. 48 (sodic soils, see Alkaline soils, Soils--Sodium content)
found: Rogers, G. Ecosystem-based conservation strategy for Central Otago's saline patches, 2000:p. 9 (Saline soils are dominated by sodium salts, sodic soils are dominated by exchangeable sodium, and saline-sodic soils are where sodium is predominant in both salts and in exchangeable forms. Alkalinity is frequently associated with sodicity. These classes correspond closely with those defined by Raeside et al. (1966) except that they used the term "alkaline" rather than "sodic". Sodic soils: electrical conductivity less than 0.18 mS/cm, exchangeable sodium percentage of 15% or more, and pH above 8.5)
