. 2021 Aug 24;10(9):1758. doi: 10.3390/plants10091758

Table 6.

The equations used in the present study and their corresponding number.

Equation	Equation Number	Reference
$A b o v e - g r o u n d N u p t a k e = \frac{D M (k g h a^{- 1}) * A b o v e - g r o u n d t i s s u e s N c o n t e n t (%)}{100}$	(1)	[25]
Seed N uptake = $\frac{S e e d y i e l d * s e e d N c o n t e n t (%)}{100}$	(2)	[25]
Total N uptake = Above-ground N uptake + Seed N uptake (kg ha⁻¹)	(3)	[25]
$N H I = \frac{S e e d N u p t a k e}{T o t a l N u p t a k e}$	(4)	[25]
$N U t E = \frac{S e e d Y i e l d}{T o t a l N u p t a k e}$	(5)	[25]
$A G D D_{n} = \sum_{i = 1}^{n} (\frac{T_{\max} + T_{\min}}{2}) - T_{base}$ ¹	(6)	[30]

¹ Tmax is the highest daily temperature value. Tmin is the lowest daily temperature value. Tbase for flax is 5 °C [30].