Table 9 Effects of experimental treatments on grain yield (ton fed⁻¹) during the 2019 and 2020 seasons, drought depression (DD), and relative yield reduction (RYR %) as an average of both seasons

IL₁: 80%

PD₁:17.500

2.69

2.96

3.05

2.90

2.55

2.70

2.79

2.68

PD₂:23.333

2.95

3.17

3.34

3.15

2.88

3.22

3.29

3.13

PD₃:35.000

3.13

3.41

3.63

3.39

3.20

3.59

3.67

3.49

Mean of IL₁

2.92

3.18

3.34

3.15

2.88

3.17

3.25

3.10

IL₂: 70%

PD₁:17.500

2.52

2.83

2.96

2.77

2.37

2.91

3.06

2.78

PD₂:23.333

2.67

2.96

3.06

2.90

2.75

3.01

3.13

2.96

PD₃:35.000

3.00

3.26

3.38

3.21

2.97

3.32

3.41

3.23

Mean of IL₂

2.73

3.01

3.13

2.96

2.70

3.08

3.20

2.99

IL₃: 60%

PD₁:17.500

2.16

2.38

2.53

2.36

2.16

2.35

2.63

2.38

PD₂:23.333

2.35

2.42

2.66

2.48

2.42

2.53

2.65

2.53

PD₃:35.000

2.52

2.68

2.94

2.71

2.58

2.74

2.96

2.76

Mean of IL₃

2.34

2.49

2.71

2.52

2.39

2.54

2.75

2.56

Mean of (PD × An)

PD₁:17.500

2.46

2.72

2.85

2.68

2.36

2.65

2.83

2.61

PD₂:23.333

2.66

2.85

3.02

2.84

2.68

2.92

3.02

2.88

PD₃:35.000

2.88

3.12

3.32

3.11

2.92

3.22

3.34

3.16

Mean of An

2.67

2.90

3.06

–

2.65

2.93

3.06

–

LSD_0.05

IL: 0.03

PD: 0.04

IL: 0.04

PD: 0.04

An: 0.03

IL × PD: 0.06

An: 0.02

IL × PD: 0.02

IL × An: 0.05

PD × An: 0.05

IL × An: 0.04

PD × An: 0.04

IL × PD × An: NS

IL × PD × An: 0.07

IL₂: 70%

PD₁:17.500

0.17

− 0.04

− 0.09

6.49

− 1.41

− 3.08

PD₂:23.333

0.21

0.21

0.22

7.19

6.56

6.63

PD₃:35.000

0.18

0.21

0.26

5.68

6.00

6.85

Mean of IL₂

0.19

0.19

0.13

0.15

6.45

3.72

IL₃: 60%

PD₁:17.500

0.46

0.46

0.34

17.56

16.25

11.64

PD₂:23.333

0.53

0.72

0.66

18.15

22.50

19.88

PD₃:35.000

0.62

0.79

0.70

19.56

22.57

19.18

Mean of IL₃

0.54

0.54

0.66

0.59

18.42

20.44

Mean of (PD × An)

PD₁:17.500

0.32

0.21

0.13

12.03

7.42

4.28

PD₂:23.333

0.37

0.47

0.44

12.67

14.53

13.26

PD₃:35.000

0.40

0.50

0.48

12.62

14.29

13.02

Mean of An

0.36

0.40

0.35

12.44

12.08

10.19