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Environmental Sciences Europe
Fig. 3 | Environmental Sciences Europe

Fig. 3

From: Toxicity of ZnO and Fe2O3 nano-agro-chemicals to soil microbial activities, nitrogen utilization, and associated human health risks

Fig. 3

Principal component analysis (PCA) of residual soil mineral N, mineralized organic N, colony forming units of bacterial and fungi, microbial biomass Fe and Zn, total dry matter (TDM) yield, total N uptake (TNU), total N recovery (TNU), daily intake of metal (DIM), health risk index (HRI), Plant Fe and Zn content from PM exposed with or without ZONPs and/or IONPs. Treatments are represented by the use of various markers, i.e., open circles (unfertilized control), filled circles (PM), open rectangles (IONPs), filled rectangles (IONPs + PM), open triangles (ZONPs), filled rectangles (ZONPs + PM), open diamond (ZONPs + IONPs) and filled diamonds (ZONPs + IONPs + PM). Most of the variations in the data are explained by PC1 (45.09%) and PC2 (19.58%) as given in the statistics table (inset), and the individual scores are unitless

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