The purpose of my experiment was to determine the effects of water solutions that contain different levels of nitrogen on bean growth.
I became interested in this idea when I noticed my dad putting lawn clippings on our vegetable garden and I wondered if it would help the garden to be healthier and produce more vegetables. I wondered if adding different fertilizer solutions would make a more productive garden.
The information gained from my experiment will help gardeners and farmers
grow healthier gardens and more abundant crops.
My hypothesis is that the plants receiving a 4% nitrogen solution will be affected the most by growing the tallest.
I base my hypothesis on information that I gathered from Doug Anyan, an employee at G.S. Long. He told me, "A plant receiving a 4% nitrogen solution would grow better than plants receiving levels of nitrogen other then 4%."
The constants in this study were:
The manipulated variable was the amount of nitrogen in the solution.
The responding variable was the bean height in centimeters and the weight of the green matter in grams.
To measure the responding variable I took a ruler and measured the plants in centimeters after two weeks of growth. I then found the average of the two plants growth and the weight in grams of the green matter on a scale.
1. Gather materials
The original purpose of this experiment was to determine if the level of nitrogen would affect a plants growth.
The results of the experiment were the control group grew the best (20cm), the .5% and the 1% grew the second best (1.5cm), and the 2%, 4%, 6%, and the 10% died. The control group also weighed the most (3.5g), the 1% was the second heaviest (3g), the 2%, 6%, and the 10% weighed 2g, and the .5% and the 4% weighed 1.5g.
My hypothesis was that the plants receiving a 4% nitrogen solution would grow the best.
The results indicate that this hypothesis should be rejected. My results indicate that the plants that werent given any nitrogen (the control group) grew the best.
Because of the results of this experiment, I wonder if a plant receiving an amount of nitrogen larger then 2% will die and if I would get the same results if I used different plants?
The usefulness of my findings will benefit farmers so they know not to overdose their bean plants with nitrogen.
If I were to conduct this project again I would try harder to find more info before writing my procedures, I would start growing my plants in early November for better results, I would use more plants in each of my groups, and I would try to get better pictures to document by experiment.
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