Table 6 Water stress rates and salicylic acid concentrations influence on tree yield, hypothetical yield per feddan, water use efficiency and water unit return of Washington navel orange trees (2021–2022 seasons)

48.57^a

10.20^a

2.07^a

8.28^a

34.01^b

7.14^b

1.94^b

7.75^b

21.38^c

4.49^c

1.85^c

7.40^c

29.12^d

6.11^d

1.80^d

7.21^d

32.83^c

6.89^c

1.78^c

7.10^c

36.76^b

7.72^b

2.01^b

8.06^b

39.92^a

8.38^a

2.19^a

8.76^a

40.51^c

8.51^c

1.74^f

6.95^f

47.54^b

9.98^b

1.97^d

7.86^d

52.76^a

11.08^a

2.19^b

8.75^b

53.47^a

11.23^a

2.28^b

9.13^b

29.12^f

6.11^f

1.86^g

7.46^g

31.40^e

6.59^e

1.74^f

6.95^f

33.74^d

7.09^d

1.88^e

7.54^e

41.79^c

8.78^c

2.27^a

9.06^a

17.72^h

3.72^h

1.78^h

7.14^h

19.54^h

4.10^h

1.62^g

6.49^g

23.77^g

4.99^g

1.97^d

7.89^d

24.51^g

5.15^g

2.02^c

8.08^c

60.65^a

12.74^a

2.69^a

10.74^a

43.43^b

9.12^b

2.55^b

10.22^b

26.61^c

5.59^c

2.39^c

9.57^c

35.88^d

7.53^d

2.30^d

9.21^d

40.52^c

8.51^c

2.25^c

9.02^c

47.37^b

9.95^b

2.66^b

10.66^b

50.49^a

10.60^a

2.91^a

11.65^a

52.53^c

11.03^c

2.33^e

9.34^e

58.95^b

12.38^b

2.55^d

10.20^d

64.96^a

13.64^a

2.81^b

11.25^b

66.16^a

13.89^a

2.93^b

11.73^b

34.16^f

7.17^f

2.31^g

9.23^g

38.79^e

8.15^e

2.18^e

8.73^e

46.81^d

9.83^d

2.63^c

10.52^c

53.96^c

11.33^c

3.09^a

12.38^a

20.94^h

4.40ⁱ

2.27^h

9.10^h

23.82^h

5.00^h

2.03^f

8.12^f

30.34^g

6.37^g

2.55^d

10.20^d

31.33^g

6.58^g

2.71^c

10.85^c