Table 7 Effect of irrigation system and water management strategy on the biological parameters of soil.

From: Effects of irrigation systems and water management strategies on soil chemical properties and citrus tree productivity in clayey soils

IS

Sn

Macro nutrients content

Na %

Na/K ratio (%)

N %

P %

K %

FI

1

2.26

0.20

1.59

0.54

0.34

2

2.24

0.19

1.61

0.54

0.33

3

2.25

0.20

1.58

0.57

0.36

FFDI

1

2.15

0.18

1.56

0.59

0.38

2

2.11

0.18

1.56

0.61

0.39

3

2.18

0.17

1.55

0.60

0.39

FSDI

1

2.30

0.21

1.65

0.52

0.32

2

2.29

0.21

1.66

0.54

0.33

3

2.31

0.22

1.67

0.53

0.32

DFDI

1

1.82

0.13

1.30

0.74

0.57

2

1.64

0.11

1.20

0.79

0.66

3

1.49

0.10

1.01

0.83

0.82

DSDI

1

2.08

0.18

1.48

0.61

0.41

2

1.88

0.16

1.35

0.68

0.50

3

1.80

0.14

1.24

0.71

0.57

  1. N: nitrogen; P: phosphorus; K: potassium; Na: sodium; Na/K ratio: the ratio of sodium to potassium. FI: flood irrigation; DFDI: deficit surface drip irrigation; DSDI: deficit sub-surface drip irrigation; FFDI: full surface drip irrigation; FSDI: full sub-surface drip irrigation.
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