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Table 3 Two-way ANOVA of Aeration volume (A), Salinity level (S) and the A × S interaction on root length (cm/plant), surface area (cm2/plant) and volume (cm3/plant) distribution by root diameter

From: Effect of soil aeration on root morphology and photosynthetic characteristics of potted tomato plants (Solanum lycopersicum) at different NaCl salinity levels

 Root diameter (D) mmAeration volume (A)Salinity level (S)A × S
Root length0–0.134.642**50.032**7.990**
0.1–0.223.235**47.477**8.981**
0.2–0.516.141**43.765**5.879**
0.5–1.012.696**28.400**2.458 ns
1.0–2.07.176**12.649**0.805 ns
>2.03.752*4.764*0.301 ns
Root surface area0–0.134.675**51.435**8.355**
0.1–0.223.132**48.499**9.162**
0.2–0.515.997**43.234**5.369**
0.5–1.012.492**27.429**2.377 ns
1.0–2.06.941**12.180**0.762 ns
>2.02.894 ns4.028*0.320 ns
Root volume0–0.135.306**53.769**8.872**
0.1–0.222.956**49.463**9.337**
0.2–0.515.728**42.319**4.867**
0.5–1.012.253**26.422**2.289 ns
1.0–2.06.704**11.704**0.724 ns
>2.01.794 ns3.025 ns0.336 ns
  1. Note: ANOVA F-value for main and interaction effects were not significant (ns) or significant at ≤5% (*) and ≤ 1% level (**)