The availability of soil boron fractions to olive trees and barley and their relationships to soil properties

Soil boron occurring in various forms was correlated with boron contents in the leaves of olive trees in 51 and in barley leaves in 20 soils. The amounts of boron: in soil solution (CwsB), non specifically adsorbed (NsaB), specifically adsorbed (SaB), occluded in Mn oxides (MnoB), occluded in amorphous Fe-Al oxyhydroxides (FeoB), were correlated with soil properties such as: organic matter content, pH, free aluminum and iron oxyhydroxides (Ald, Fed), amorphous aluminum and iron oxyhydroxides (Alo, Feo). The later correlation studies were conducted on a total number of 153 soil samples inclusive of the soils used for the plant uptake investigations.