Mineral nutrients (% DW)

Regression equation

R²

Nitrogen

Y = 2E−07X + 0.374

R² = 9E−08^NS

Phosphorous

Y = −0.0001X + 0.117

R² = 0.393**

Potassium

Y = −0.0008X + 1.158

R² = 0.446**

Calcium

Y = −9E−05X + 0.109

R² = 0.417**

Magnesium

Y = −8E−06X + 0.046

R² = 0.022^NS