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Table 3 Compilation of linear regression parameters between parallel capacitance and root mass, and corresponding sensitivity scores from literature data

From: Benchmarking electrical methods for rapid estimation of root biomass

Publication Species Characteristic root mass m 0 (g) b/(a × m 0 ) r 2 s Growth media Comments
Chloupek [17] Zea mays 0.728 Sand Dried
  Allium cepa 0.545 Sand Dried
  Helianthus annuus 0.897 Sand Dried
  Avena sativa 0.464 Clay soil Dried
  Helianthus annuus 0.432 Clay soil Dried
  Brassica napus 0.081 Fresh
Chloupek [37] Daucus carota 0.514 Loam (field) Fresh
  Helianthus annuus 0.566 Sand Fresh
Kendall et al. [32] Medicago sativa 0.2 0.03 0.50 0.48 Silt loam (field) Dried
  Trifolium Pratense 0.67 Hydroponics Dried
Dalton [18] Solanum lycopersicum Mill. 2 0.17 0.77 0.57 Hydroponics Dried
van Beem et al. [24] Zea mays L. 100 0.17 0.53 0.44 Loam (field) Fresh
   5 1.33 0.73 0.00 Vermiculite Fresh
Ozier-Lafontaine and Bajazet [23] Solanum lycopersicum Mill. 1 0.55 0.82 0.36 Clay loam Dried
  Solanum lycopersicum Mill. 1 0 0.99 0.99 Hydroponics Dried
Aulen and Sipley [19] Herbaceous species 0.1 0 0.30 0.3 Compost Dried
Dietrich et al. [25] Triticum aestivum L. 1 0.32 0.75 0.51 Sand Dried
Ellis et al. [36] Vicia faba L. 10 0.48 0.31 0.16 Sheep manure Fresh
Present study Triticum turgidum L. ssp. durum 1 0.09 0.787 0.72 Silt loam, loam, sandy loam Dried