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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