Stoichiometric Mineral Salt Mixes

Early Harvest

2^nd Harvest

Total yield

1) K + K + K (12 mM KCl solution)

2965 ± 105

3633 ± 140

7598 ± 122

2) N + N + P + K (50 mM NH₄Cl plus 20 mM Na₂HPO₄ plus 4 mM KCl solution)

3600 ± 120

2960 ± 114

6560 ± 109

3) S (50 mM Na₂SO₄ solution)

4060 ± 166

1884 ± 107

5944 ± 129

4) K + K + S (8 mM KCl plus 50 mM Na₂SO₄ solution)

3297 ± 213

2556 ± 90

5853 ± 150

5) K + K (8 mM KCl solution)

3755 ± 101

2018 ± 80

5773 ± 83

6) N + P + K (25 mM NH₄Cl plus 20 mM Na₂HPO₄ plus 4 mM KCl solution)

3191 ± 130

2556 ± 81

5748 ± 121

7) K + K + N (8 mM KCl plus 25 mM NH₄Cl solution)

3559 ± 190

2018 ± 94

5570 ± 140

8) P + P + K (40 mM Na₂HPO₄ plus 4 mM KCl solution)

2335 ± 82

3229 ± 110

5564 ± 91

9) Regular Fertilizer (triple 15)

2846 ± 143

2634 ± 156

5469 ± 148

10) K + N (4 mM KCl plus 25 mM NH₄Cl solution)

3553 ± 150

1884 ± 69

5436 ± 94

11) P + P + N (40 mM Na₂HPO₄ plus 25 mM NH₄Cl solution)

3937 ± 119

1480 ± 76

5417 ± 86

12) P + K (20 mM Na₂HPO₄ plus 4 mM KCl solution)

3497 ± 101

18847 ± 90

5381 ± 95

13) K + K + P + S (8 mM KCl plus 20 mM Na₂HPO₄ plus 50 mM Na₂SO₄ solution)

3455 ± 120

17496 ± 220

5204 ± 194

14) P + N (20 mM Na₂HPO₄ plus 25 mM NH₄Cl solution)

2363 ± 120

2691 ± 109

5054 ± 112

15) N + N + S (50 mM NH₄Cl plus 50 mM Na₂SO₄ solution)

3759 ± 109

1211 ± 63

4970 ± 95

16) N + P + K + S (25 mM NH₄Cl plus 20 mM Na₂ HPO₄ plus 4 mM KCl plus 50 mM Na₂SO₄ solution)

3551 ± 103

1345 ± 66

4897 ± 81

17) P + K + S (20 mM Na₂HPO₄ plus 4 mM KCl plus 50 mM Na₂SO₄ solution)

2998 ± 78

1884 ± 69

4882 ± 71

18) K (4 mM KCl solution)

3621 ± 61

1211 ± 59

4832 ± 58

19) N + P + K + K (25 mM NH₄Cl plus 20 mM Na₂HPO₄ plus 8 mM KCl solution)

2295 ± 30

2287 ± 80

4583 ± 61

20) K + K + P (8 mM KCl plus 40 mM Na₂HPO₄ solution)

3085 ± 88

1345 ± 89

4431 ± 87

21) K + S (4 mM KCl plus 50 mM Na₂SO₄ solution)

3331 ± 94

1076 ± 52

4407 ± 70

22) P (20 mM Na₂HPO₄ solution)

3162 ± 35

1076 ± 47

4238 ± 41

23) N + N (50 mM NH₄Cl solution)

2750 ± 66

1480 ± 81

4235 ± 473

24) N (25 mM NH₄Cl solution)

2199 ± 44

2018 ± 71

4217 ± 56

25) P + S (20 mM Na₂HPO₄ plus 50 mM Na₂SO₄ solution)

3274 ± 79

942 ± 39

4215 ± 45

26) K + K + K + P (12 mM KCl plus 20 mM Na₂HPO₄ solution)

2984 ± 28

1211 ± 95

4195 ± 58

27) N + S (25 mM NH₄Cl plus 50 mM Na₂SO₄ solution)

2232 ± 45

1749 ± 79

3981 ± 51

28) Control

2433 ± 60

1211 ± 79

3644 ± 64

29) USA Farmers’ Yield

1984 [81]