Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation
to Phosphorus Fertilization, Crop Sequence and Tillage Management
Principal component analysis (based on correlation matrix) of grain yield, grain concentrations of Cd, Zn, Cu, Fe, Mg, K, P, Mn, Ca, grain protein concentration, and selected soil properties (soil P and soil Cd) across 6 site-years. Biplot vectors are trait factor loadings for principal component 1 (PC1) and PC2. Data at each site-year are averaged across P fertilizer treatments.
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