How Does Salt Effect Plants
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How Does Salt Effect Plants. 9-5 Project 1 March 2 2008. The purpose of my project is to see the effect that salt has on plants. Purpose. My hypothesis is that the salt will have a negative effect on the plants. I think that road salt will have the most negative effect on the plants.

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How Does Salt Effect Plants

9-5 Project 1

March 2 2008



Hypothesis

My hypothesis is that the salt will have a negative effect on the plants. I think that road salt will have the most negative effect on the plants.

Hypothesis


Materials
Materials on the plants. I think that road salt will have the most negative effect on the plants.

  • 4 9'' plant pots

  • 4 plants ( Dumb cane 'Camille')

  • Road salt

  • Road salt/sand

  • Saltwater (from the ocean)

  • Measuring tape

  • Room temperature water

  • Potting soil


Method
Method on the plants. I think that road salt will have the most negative effect on the plants.

  • First replant the plants into the 9'' pots using potting soil.

  • Place 1 tbl spoon of road salt onto the surface of the soil onto one plant, and 1 tbl spoon of salt/sand onto another plant.

  • Water 3 plants (the control, the sand/salt and the salt) with ½ cup each of room temperature water. Water the final plant with ½ cup of room temperature seawater.


  • Every second day add one tablespoon of salt and salt/sand to 2 of the plants. (label each one so that you can know what to put on each.)


Variables

Manipulated Variable: record each plant every day noting changes in color and amount of leaves. Different types of salt on each plant.

Responding Variable: How the plants react to the salt. Ex; Height, color etc.

Control Variables: - type of plant

- size of pot

- type of soil

-amount of water added

- amount of salt added. ( for the two that had salt.)

Variables


Results
Results record each plant every day noting changes in color and amount of leaves.


Changes While growing: record each plant every day noting changes in color and amount of leaves.

Salt: - turned yellow and started to droop at day 3

- turned brown at day 8

Water: - New leaves started to come at day 5

- new leaves opened at day 11

Sand/Salt: -Started to turn yellow at day 2

Sea water: -A couple of leaves turned yellow at day 7


Salt day 0 Salt day 14 record each plant every day noting changes in color and amount of leaves.

Water day 0 Water day 14

Sand/salt day 0 Sand/salt day 14

Seawater day 0 Seawater day 14


Analysis
Analysis record each plant every day noting changes in color and amount of leaves.


Conclusion

My conclusion is that yes, salt does effect plants. My hypothesis was correct when I said that salt does effect plants. However I was incorrect when I guessed that the plain road salt would effect the plants most, the sand/ salt effect the plants the most.

Conclusion


Sources of error
Sources of Error hypothesis was correct when I said that salt does effect plants. However I was incorrect when I guessed that the plain road salt would effect the plants most, the sand/ salt effect the plants the most.

  • The plants were not the exact same height when i started the experiment.

  • The water may not have been the exact same temperature every time because i did not check. However it was were room temperature

  • The plants were watered with ½ cup of water each day which might have been too much.

  • Human error. I may have made an error in measuring and recording the plants.

  • I did not water the plants at exactly the same time every day.


Ways to improve
Ways to Improve hypothesis was correct when I said that salt does effect plants. However I was incorrect when I guessed that the plain road salt would effect the plants most, the sand/ salt effect the plants the most.

  • Start the plants from seed that way they would all start from the same point.

  • Use a controlled light source.

  • Do the experiment again to see if results come out differently.

  • Make sure that the temperature of the water is the exact same every time.


The end

THE END : ) hypothesis was correct when I said that salt does effect plants. However I was incorrect when I guessed that the plain road salt would effect the plants most, the sand/ salt effect the plants the most.


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