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$ I B ~@ | IP I. Plant Fertilizer
II. Does fertilizer help plants grow?
III. If you add fertilizer to plants, then they will grow larger than plants without fertilizer.
IV. Materials: 2 cups/pots, labeled A and B
potting soil
fertilizer
water
marigold seeds
Independent Variable: fertilizer/no fertilizer
Dependent Variable: growth of the plants
Controlled Variables: amount of soil, amount of water, cups/pots, type of seeds,
number of seeds per cup/pot, depth of seeds, sunlight
Procedure: 1. Add 2 cups of soil to each pot.
2. Place 2 marigold seeds 1 inch deep into each pot.
3. Put both pots in equal sunlight.
4. Add 2 tablespoons of water to each pot on day 1.
5. Add 1 teaspoon of plant fertilizer to pot A
6. Add 1 tablespoon of water to both pots and 1 teaspoon of fertilizer
to pot A every 2 days.
7. Record height |of plant every day for 10 days beginning on day 5.
V. Data Chart-see attached
VI. My results show that fertilizer helps plants grow. The marigold in Pot A (fertilizer) grew to 20 mm in 14 days. In Pot B (no fertilizer), the marigold only grew to 12 mm. My hypothesis was correct.
There are a few possible concerns/problems in my experiment. On day 8, Pot B fell over and some of the soil spilled out. I put the soil back in the pot as I sat it up. The plant didnt appear to be effected but there is no way I can prove that it was not. This may lead to a flaw in the results. Also, by the end of the 14 days, the plants were still growing and and the flowers had not yet bloomed. Therefore, my hypothesis can only prove to be true in the short term (14 days). I did not measure long term effects (longer than 14 days).
Plant Growth in mm/cm
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