Table 2.

The [N] and [¹⁵N] of soil samples taken from 0 to 10 cm depth on July 11, 2018, during winter dormancy. Mean values ± SE, n = 4.

Treatment	[N] (% dry weight)	[15N] (atom %)
Control	0.143 ± 0.013	0.3696 ± 2.2 × 10−4
Pre-harvest	0.146 ± 0.008	0.3773 ± 2.0 × 10−3 ns
Post-harvest	0.139 ± 0.005	0.3811 ± 3.0 × 10−3**
50:50 split	0.152 ± 0.005	0.3873 ± 2.5 × 10−3***

[¹⁵N] values accompanied by a notation indicating the extent of difference from the Control for Dunnett's test: ns p > 0.05; **p < 0.01; ***p < 0.001.