Hi Prince 200,
I think you did this project from the Science Buddies website, and it is a really great project: http://www.sciencebuddies.org/science-f ... p017.shtml
Heloise has given you some really good suggestions that might explain why you didn’t obtain the expected results. The temperature, oxygen, and light conditions are really important for potatoes to grow roots. From Heloise’s suggestions, do you know what was different in your experiment compared to the project guide that might have caused the potatoes to rot?
I would like to add some additional comments. First, is not possible for a science project not to work or to have the wrong results; you have set up a controlled experiment and obtained results. So, when you write up your results, you should not say that your experiment did not work. You should describe your experiment, state your hypothesis, and present your results (no roots, rotten potatoes). You will have to say that your hypothesis was not correct, but you can do some additional background research and explain what happened, and perhaps describe what you would do differently if you were to do the project again.
Since the conditions in your experiment were not optimum for potato growth, your project actually turned into a microbiology project. There are lots of bacteria that grow on potatoes called soft rot bacteria. http://ohioline.osu.edu/hyg-fact/3000/3106.html
The bacteria were probably present on the potatoes when you started the experiment, and since your experiment did not provide conditions that allowed potatoes to grow, the bacteria were able to take over and use the potato as a food source. You should go ahead and write up your results and start working on your project board. Since this is a science project, it’s really important to communicate your results.http://www.sciencebuddies.org/science-f ... oard.shtml
Here is an advanced project idea on composting. Read the introduction of this project to learn more about what may have happened in your experiment.http://www.sciencebuddies.org/science-f ... p035.shtml
Also, since your project is not due until April 2, while you are writing up your results, you could also set up your experiment again and see what happens.