Soil pH Effects on the Distribution and Plant Availability of Manganese, Copper, and Zinc
https://www.agronomy.org/publications/sssaj/abstracts/50/2/SS0500020367
Correlation of Cadmium Distribution Coefficients to Soil Characteristics
https://www.crops.org/publications/jeq/abstracts/32/1/138
Distribution coefficients of Cd, Co, Ni, and Zn in soils
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2389.1988.tb01190.x/abstract
Abundance of chemical elements in the continental crust: a new table
http://www.sciencedirect.com.www.ezplib.ukm.my/science/article/pii/0016703764901292
