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Table 5 ANOVA results testing effects of weed control types (WCT: glyphosate-based herbicides GBHs, their active ingredients AIs, or hand weeding as control) and soil organic matter level (SOM) on water infiltration rate and leachate, and glyphosate concentrations in soil and water

From: Effects of glyphosate-based herbicides and their active ingredients on earthworms, water infiltration and glyphosate leaching are influenced by soil properties

Factors Measurement parameters
  Water infiltration rate (mm min−1) Water leachate (l m−2)
  Df F value Pr (> F) Df F value Pr (> F)
Weed control type 2 4.725 0.012 2 4.996 0.010
SOM 1 45.991  < 0.001 1 28.072  < 0.001
WCT x SOM 2 5.935 0.004 2 1.279 0.285
Residuals 64    64   
   t value Pr ( >|t|)   t value Pr ( >|t|)
Multiple comparisons of means (Tukey)
AI—Control   3.006 0.010   2.268 0.066
GBH—Control   − 2.680 0.024   − 0.245 0.967
GBH—AI   0.461 0.888   2.861 0.015
  Glyphosate conc. in soil (ng g−1) Glyphosate conc. in water (ng g−1)
  Df F value Pr (> F) Df F value Pr (> F)
Weed control type 2 5.910 0.003 2 11.317  < 0.001
SOM 1 2.745 0.099 1 22.144  < 0.001
Time 1 52.727  < 0.001 NA NA NA
WCT x SOM 2 7.242 0.001 2 4.163 0.020
Residuals 200    62   
   t value Pr ( >|t|)   t value Pr ( >|t|)
Multiple comparisons of means (Tukey)
AI—Control   − 3.135 0.006   − 1.549 0.269
GBH—Control   3.317 0.003   4.049  < 0.001
GBH – AI   0.269 0.960   3.953  < 0.001
  1. See Figs. 2, 3 for illustrations of these effects. Significant treatment effects are in bold
  2. NA not applicable