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. 2017 Apr 10;8:14865. doi: 10.1038/ncomms14865

Figure 3. Herbicide chronic hazard quotients for six crops 1990 to 2015.

Figure 3

Hazard quotient is the number of chronic rat (oral, 24 month) NOEL values applied per hectare. Mann-Kendall tests for monotonic trend: maize (tau=0.50, P=0.006); soybean (tau=−0.69, P<0.001); cotton (tau=0.60, P=0.001); rice (tau=−0.87, P=0.024); spring wheat (tau=0.02, P=0.964); winter wheat (tau=0.10, P=0.620).