Correlation analysis indicated that there were significantly negative correlations between soil biomass carbon and urease activity with available lead content in the soil.

Note that this is also a source of great controversy as the many tricks available lead to a certain brittleness about the translation from the various syntaxes and the resulting RDF abstract model.

Both nickel and lead have seen available stocks shrink to critically low levels this year and this means that any possible disruption to supplies has had an amplified effect on prices.