Felicia’s “Citrus Fiesta”

IMG_9183Booksin’s Annual 4th Grade Science Fair was today! Felicia’s entry was called “Citrus Fiesta,” and it explored how different liquids support growth in plants.

Big Question & Purpose: “Does orange juice, cran-apple juice, grapefruit juice, or water help a plant grow more quickly?”

Hypothesis: I believe that the Grapefruit Juice will work best out of the juices, because it has Potassium, Calcium, and Magnesium.


Results

  1. The water was the strongest at 73% survival rate and 9 cm average height.
  2. The orange juice was the 2nd strongest at 80% survival rate and 4.2 cm average height.
  3. The Cran-Apple was the 3rd strongest at 40% survival rate and 3.7 cm average height.
  4. The Grapefruit Juice was the 4th strongest at 33% survival rate and 1.8 cm average height.

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Water: The average height at the end of the experiment was 9 cm. The survival rate was 75%. I observed that two of the plants were doing so well then they started to shrink.

Orange Juice: The Average height of the plants at the end of the experiment was 4.2 cm. The survival rate was 80%. I observed that the dirt was tough and I believe it had mold on the top.

Cran-Apple Juice: The Average height at the end of the experiment was 3.7 cm. The survival was 40%. I observed that the dirt was very dark and almost black. Also three of the plants died at the very end of the experiment.

Grapefruit Juice: The average height of the plants at the end of the experiment was 1.8 cm. The survival rate was 33%. I observed that the dirt had a thin layer of mold on the top. Also three of the plants died at the end of the experiment.

Procedure

  1. Push the potting soil into the container
  2. Plant seeds
  3. Water until seeds sprout
  4. When seeds sprout begin feeding the plants with 1 teaspoon every other day with the juices
  5. Poke holes in the dirt

Materials

  • 1 teaspoon Simply Grapefruit Juice every other day
  • 1 teaspoon Minute Maid Orange Juice with Calcium and Vitamin D every other day
  • 1 teaspoon Cran-Apple Juice, Ocean Spray every other day
  • 1 teaspoon Water every other day
  • Natural organic potting soil, enough to fill 24 1.5 in. cells
  • 25 Flying Saucers Morning Glory seeds
  • 72 spot container for plants, with 1.5 by 1.5 in. cells

Conclusion

In conclusion my Hypothesis was incorrect because the average height of the Grapefruit Juice was 1.8 cm which was the smallest and the survival rate was the worst at 33%.

One possibility is that the citrus caused mold in the dirt. The mold then made the dirt appear unhealthy. The dirt then was not suitable for the plants and they did not grow as well.

If I do another experiment I would see when plants are fed different juices, then water, which plants come back strong.


Of course, comparison is the albatross of all younger children. Jocelyn’s 4th grade science project in 2009 was the “Elevation Exclamation,” and 5th Grade was called “Up, Up, and Away” [design similarities are completely coincidental].