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Observation

It is observed that tomato plants grow well with onions but not with corn. The tomato plant grew an average of 48mm by itself in pot A but was able to grow up to 65mm when planted with the onion in pot D. However the tomato planted in pot E together with the corn, was only able to grow 28mm in the 10 days. Similarly the onion only grew 18mm by itself in pot B but grew 33mm in pot D when it was planted together with the tomato plant. The corn plant grew 28mm by itself in pot C but only grew 14 mm in pot E when planted with the tomato.
 


Pot

Plants

Height of the plant measured after 2 weeks (mm)

Average (mm)

1

2

3

A

Pot Tomato

48

42

54

48

B

Onion

15

21

18

18

C

Corn

24

32

28

28

D

Tomato
Onion

62

68

65

65

32

38

29

33

E

Tomato
Corn

24

28

32

28

12

14

16

14
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Complexity level:
7
Project cost ($):
30
Time required:
1 hour to prepare, 10 days for observation
Material availability:
Easily found. May be purchased at a plant nursery.
Safety concerns:

None