Division II.2 Sampling depths

Lysimeters shall be installed at fixed depths but installation by horizons is also acceptable.

• Soil solution collectors

Where appropriate lysimeters shall be placed at least two depths, i.e. one within the rooting zone (suggested depth is 10 to 20 cm) to gain insight into concentrations of nutrients and toxic elements near the fine roots (aim 1) and one below the rooting zone (suggested depth is 40- 80 cm), to estimate the element output (aim 2). A third lysimeter may also be placed immediately below the humus layer.