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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