Within each plant quadrat, three soil samples were collected from the following the seven soil layers 0–10, 10–20, 20–30, 30–40, 40–50, 50–70 and 70–100 cm
Within each plant quadrat, three soil samples were collected from the following the seven soil layers 0–10, 10–20, 20–30, 30–40, 40–50, 50–70 and 70–100 cm