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Table 2 Descriptive statistics of walnut morphological traits

From: 3D characterization of walnut morphological traits using X-ray computed tomography

Morphological trait Unit Mean ± SDa Range
Nut
 Nut length mm 38.39 ± 2.18 28.57–51.43
 Nut face diameter mm 32.27 ± 1.70 25.99–40.75
 Nut profile diameter mm 33.29 ± 1.70 27.06–42.84
 Nut volume mm3 19,400.02 ± 2669.03 10,382.05–42,813.08
 Nut shape VA3D 1.47 ± 0.08 1.24–1.69
 Nut feret shape 3D 1.25 ± 0.05 1.12–1.48
 Nut surface area mm2 4019.53 ± 401.91 2622.59–7093.53
 Nut sphericity 0.88 ± 0.02 0.84–0.93
Shell
 Shell volume mm3 4076.78 ± 595.05 2390.66–9051.88
 Shell thickness mm 1.03 ± 0.12 0.73–1.49
 Shell rugosity 1.14 ± 0.02 1.07–1.19
Kernel
 Kernel volume mm3 5723.89 ± 1039.03 3408.85–9548.93
 Kernel filling ratio % 30.02 ± 3.55 20.66–37.42
Empty space
 Empty space volume mm3 9599.35 ± 1719.56 4536.51–24,212.21
  1. aSD is the abbreviation for standard deviation