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Table 1 Composition, pH, and zeta potential of the various applied foliar fertilizer treatments

From: Nano- and Pheroid technologies for development of foliar iron fertilizers and iron biofortification of soybean grown in South Africa

  Composition Fe
(g L−1)
pH
(−)
Zeta potential (mV) Spray application
T1 Control (dH2O) 0 7.5 ± 0.4   1, 2, 3
T2 Pheroids 0 7.4 ± 0.6 − 25 ± 3 1, 2, 3
T3 FeSO4 0.4 5.3 ± 0.7   1, 2, 3
T4 Pheroids + FeSO4 0.4 3.9 ± 1.2 − 14 ± 2 1, 2, 3
T5 FePO4 0.4 6.7 ± 0.8 − 14 ± 3 1, 2, 3
T6 Pheroids + FePO4 0.4 6.4 ± 0.9 − 24 ± 4 1, 2, 3
T7 FeSO4, pH adjusted 0.4 4.5 ± 0.5   2, 3
T8 FeSO4 + citrate 0.4 4.2 ± 0.1   2, 3
  1. The BBCH growth stages of the spray applications are: 1, stage 69; 2, stage 77; and 3, stage 79