Figure 1

Contents of total nitrogen (TN, A), nitrate-nitrogen (NO3− -N; B) and ammonium-nitrogen (NH4+ -N; C) in the leaves and roots of Neva irrigated with magnetized and non-magnetized water for 30 days. The values are the means ± SEs. Different lowercase letters show significant differences between means in the same row at the 0.05 probability level.