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Table 1 Soil texture of the fine soil fraction (< 2 mm), mass fraction of gravel (2–25 mm), soil bulk density, field capacity (FC), permanent wilting point (PWP), porosity and chemical composition of the top and subsoil of the facility

From: Construction of a large-scale semi-field facility to study genotypic differences in deep root growth and resources acquisition

  Soil depth Clay Silt Fine sand Coarse sand Organic matter
< 2ɥm 2–50 ɥm 50–500 ɥm 500–2000 ɥm
m %
Topsoil 0–0.4 12.0 (0.2) 13.0 (0.7) 44.7 (0.7) 28.5 (1.0) 1.7 (0.10)
Subsoil 0.5–1.0 13.1 (0.4) 13.2 (0.7) 45.7 (1.1) 27.5 (0.4) 0.5 (0.05)
  Soil depth Gravel Bulk density FC PWP Porosity
m % g cm−3   vol%  
Topsoil 0–0.4 2.0 1.59 (0.01) 24 6 40
Subsoil 0.5–1.0 8.7 1.72 (0.02) 20 12 35
  Soil depth P K Mg pH(0.01 M CaCl2)  
m   mg kg−1  
Topsoil 0–0.4 3.8 (0.2) 11.1 (0.9) 5.1 (0.1) 7.0 (0.04)  
Subsoil 0.5–1.0 0.8 (0.1) 3.5 (0.1) 2.9 (0.1) 7.5 (0.05)  
  1. Mean value of the four units with standard error in brackets, n = 4