Fig. 2.

Gravimetric soil water content (g water 100 g⁻¹ soil, ±s.e.) at different layers when 5·0, 7·5, 10·0 mm water was supplied every 3 d. n = 5. The fitted regression lines are as follws: 5·0 mm water supply, y = 0·9538 ln(x) + 5·9757, R² = 0·9526; 7·5 mm water supply, y = 1·0767 ln(x) + 2·9493, R² = 0·9678; 10·0 mm water supply, y = 0·6961 ln(x) + 1·5294, R² = 0·9599.