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sofia > academy of environmental science and technology > science fair
Academy of Environmental Science and Technology Forest Hill Community High School
Palm Beach County Science Fair Projects
Fertilizer Effects on the Growth of the Dutch Iris
Brandon Tufts and Jill Hudson
The purpose of this project is to find out which type of solution, water or fertilizer (a. 20-30-20, b. 30-10-10), results in the greatest growth rate of the Dutch Iris. The first number in the fertilizer solution represents nitrogen amounts, the second number represents phosphorous, and the third is potassium. We planted three Dutch Iris bulbs in separate one-gallon plastic pots filled with bark mulch potting soil and watered them three times a week with each of the solutions. We recorded their growth by measuring the height of the plant from the top of the soil to the highest shoot.
Our results showed that the water fed plant grew 48 cm., the plant given the 20-30-20 fertilizer grew 51 cm., and the 30-10-10 plant grew 52 cm. We also measured the root growth, and the final results show the greatest growth for the 30-10-10 plant with 78 cm. verses 72 cm. for the water and 76.5 cm for the 20-30-20 fed plant. We conclude that 30-10-10 solutions increases the growth of the Dutch Iris the most because it provides the plant with the highest amount of nitrogen which helps the plants absorb more nutrients and encourages leaf formation. Nitrogen also promotes rapid growth that could influence the outcome of our project in the long run because we only observed the plant’s initial growth stages. If this project continued, one of the other plants might grow larger because the rapid initial growth influence on the data would cease.
For More Information:
Sasha Linsin
Forest Hill Community High School
690l Parker Avenue, West Palm Beach, Florida 33405
(561) 540-2493
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