Tomato

Cucumber

Lettuce

2004

2017

2004

2017

2004

2017

Heat energy, kWh/kg

13.24

9.84

7.52

2.73

6.72

13

Electricity, kWh/kg

2.89

3.32

3.91

7.64

9.90

13.89

Peat, m³/t

0.117

0.088

0.093

0.040

0.21

0.21

Mineral wool, kg/t

13.3

10

10.84

4.63

23

23

Nitrogen fertiliser, g/kg

11.1

8.3

11.0

4.7

1.9

1.9

Phosphorus fertiliser, g/kg

2.1

1.6

1.92

0.82

0,65

0.65

Potassium fertiliser, g/kg

16.4

12.3

14.3

6.1

4.2

4.2

Carbon dioxide, m³/t

1.5

1.1

1.19

0.51

0.4

0.4