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IRP: Organic vs. Inorganic Fertilizers

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by

Erin Dalrymple

on 2 June 2014

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Transcript of IRP: Organic vs. Inorganic Fertilizers

Day 1
Hypothesis
If we compare and contrast plants with inorganic and organic fertilizers then the plant that has the organic fertilizer will grow more because it doesn’t contain any chemicals.

Variables
Independent Variable: Fertilizer

Dependent Variable: Plant Growth

Constant: Amount of soil, amount of water, amount of fertilizer, and the type of plant.

Control: Plant without any fertilizer.

Data Table
Middle of Experiment
Graph
Last Day of Experiment
IRP: Organic Fertilizer vs. Inorganic Fertilizer on Radish Seeds
Methods:
1. Get Materials
2. Mix inorganic fertilizer with soil
3. Mix organic fertilizer with soil
4. Leave enough plain soil to be put in a pot
5. Fill beaker up to the 150 mark with dirt
6. Put 150 ml of plain soil into the first pot
7. Put 150 ml of inorganic/soil mix into the second pot
8. Put 150 ml of organic/soil mix into the third pot
9. Put four radish seeds into each pot
10. Pour 100 ml of water into each pot everyday
11. Measure plant height everyday with a ruler
12. Average the heights and record in notebook
13. Compare plant growth



Methods & Materials
Materials:
1. Access to Water (100 ml)
2. 3 Identical Pots
3. Beaker that Reaches 300
4. 12 Radish Seeds
5. Organic Fertilizer (Compost)
6. Inorganic Fertilizer (Miracle Grow)
7. Soil
8. Sticky Notes
9. Pencil/Pen
10. Notebook to Record Data
11. Calculator For Averages
12. Ruler
Because one of the pots was broken by someone who won't be named, we had to pay extra close attention to how much soil went into each pot.


Introduction
Background: We compared inorganic and organic fertilizers to see which one radish seeds grew better in. We also had a control of plain soil to see the normal growth of radish seeds.

Reason for this Experiment: We were curious to see if there was any truth behind the "Organic is Better" rumors.

Question: Will the the radish seeds in the organic fertilizer grow more than the radish seeds in inorganic fertilizer?
Plain Soil
Inorganic Fertilizer
Organic Fertilizer
Plain Soil
Organic Fertilizer
Inorganic Fertilizer
Discussion of Results
1. What does the data table show?
It shows the average growth in plain soil, inorganic fertilizer, and organic fertilizer.
2. What can be concluded from the results of the investigation?
That the radish seeds grown in plain soil grew the most and the radish seeds grown in organic soil grew the least.
3.Is there a reason to believe that the results are accurate and reliable?
Yes because they were measured twice to avoid error and watched closely.
4. How could the experiment be improved?
Have the same size of pots all the way through.
5. What could be done next time to investigate this problem further?
Not let anyone near them before the experiment begins.
Conclusion
We tested if radish seeds would grow better in inorganic fertilizer, organic fertilizer, or plain soil. What we saw from our results was the radish seed grew the best in plain soil, and grew the worst in organic soil. This contradicts our hypothesis because we predicted the seeds in organic soil would grow the most. We came in every morning to water and measure the plants, but if one thing could have been changed we would have had all the pots be the same size.
Presented By: Wes & Erin
Full transcript