Plant Fertilizer Biology Luis Santa Cruz Julia DePasquale How does plant fertilizer affect the plant? The project is going well and we think that our hypothesis might be right because the first group is dying and the middle group is thriving. Before we did the actual experiment, we did some research on: The most affective plant fertilizer The average amount of water given to a plant each day The affect of nitrogen on a plant Independent variable: the amount of fertilizer Dependent variable: the plant growth Constant variables: the sun, water, and place Control group: no fertilizer If a plant is given too much fertilizer it may die (faster than the others because too much nitrogen). If given the right amount, it will thrive. If there is no fertilizer there will be very little effect on the plant. Nine of the same plants Nine cups of water One and a half cup (343 mL) of fertilizer Safety precautions 1. 2. 3. 4. 5. 6. 7. Gather materials and safety precaution. place three of each sample plant under sunlight after adding one cup (225 ml) of fertilizer to the first set of plants. The second set gets the same sunlight but half a cup of fertilizer. The third set gets no fertilizer and the same amount of sunlight as the other. Observe for two weeks Each plant will receive the same amount of water one cup. Take before and after pictures and check hypothesis. Before After Week 1 8 Number of inches 7 6 5 4 Group 1 Group 2 Group 3 3 2 1 0 Days Our conclusion is that our hypothesis was right: the plant with the most fertilizer died out faster, the plant with the least amount thrived, and the one without fertilizer didn’t really change at all. There wasn’t really anything that did not follow our procedures that we did. We could have adjusted our procedures for more accurate results (such as doing the experiment for two weeks instead of one) If someone is going to do this experiment, they should do it for two weeks. We did the experiment for only one. Also, they should not do it the week that they leave for something. "How Do Fertilizers Affect Plant Growth? - Yahoo! Answers." Yahoo! Answers - Home. 31 Mar. 2008. Web. 10 Jan. 2011. <http://answers.yahoo.com/question/index?qid=20080307001703AAB9iS6>. Amerman,, Don. "The Effects of Fertilizer on Plant Growth | EHow.com." EHow | How To Do Just About Everything! | How To Videos & Articles. 16 Nov. 1998. Web. 10 Jan. 2011. <http://www.ehow.com/about_5368263_effects-fertilizer-plant-growth.html>. "Fertilizers & Plant Nutrition." Orchid Growing Supplies Semi-hydroponics Hydroponics Orchid Books PrimeAgra. 18 Aug. 1996. Web. 10 Jan. 2011. <http://www.firstrays.com/fertilizers.htm>. "Plant Nutrition (Fertilizers, Vitamins) Science Fair Projects & Experiments." The Orchid Grower: A Juvenile Science Adventure Novel. 13 Dec. 2002. Web. 10 Jan. 2011. <http://www.juliantrubin.com/fairprojects/botany/plantnutrition.html>. "Re: How Do the Amounts of Fertilizer Affect Plant Growth?" MadSciNet: The 24-hour Exploding Laboratory. 3 Dec. 1997. Web. 11 Jan. 2011. <http://www.madsci.org/posts/archives/200204/1019088560.Bt.r.html>. Bleeker, Lynne. "Neuroscience For Kids - Science Fairs." UW Faculty Web Server. Web. 25 Jan. 2011. <http://faculty.washington.edu/chudler/fair.html>. Strub, David. "PLANT INTERVIEW." Personal interview. 22 Jan. 2011.