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

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

	Soil depth	Clay	Silt	Fine sand	Coarse sand	Organic matter
	Soil depth	< 2ɥm	2–50 ɥm	50–500 ɥm	500–2000 ɥm
	m	< 2ɥm	2–50 ɥm	%	500–2000 ɥm
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		pH_{(0.01 M CaCl2)}
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)

ISSN: 1746-4811