• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An Investigation To Show The Varying Amounts Of Microbial Decay Caused By The Amounts Of Water Added to soil

Extracts from this document...


An Investigation To Show The Varying Amounts Of Microbial Decay Caused By The Amounts Of Water Added. Aim Our aim is to find the best type of soil for microbial decay. Apparatus * 15 pieces of raw cabbage 4cm2 (three in each pot), * Five plastic pots, * Five pots of different types of Soil/Compost, * Five labels, * Weighing scale, * Rulers * We will put all pots in the same place making the temperature the same for each pot (room temperature). This will make the test fair. Variable We have decided that we will have one variable this will be the variation in the amount of water we give the plant at the start of the test. We will have the following: * 1 tub of peat soil, * 1 tub of sandy soil, * 1 tub of sterilised soil, * 1 tub of soil from the environmental area, * 1 tub with no soil. It is important to keep all other possible variables constant and the same through out the whole of the experiment. So I will put all of the pots in the same place in the same tray. ...read more.


The rank of the soil types is as follows (most microbial decay first): 1. Environmental Area 2. Peat 3. Sandy 4. Sterilised 5. No Soil This shows that environmental area soil has the greatest amount of nitrogen as the more nitrogen the more microbial decay. The reason this is the case is because the nitrogen accelerates the process of microbial decay, by breaking down the matter leading to mineralisation. My prediction was also correct for the pot with the least microbial decay being the pot with no soil. This is because there are very few microbes to start off any decay other than the ones in the air. Which are very few. After a longer period of only exposure to the air the cabbage may begin to decay, but this will take very much longer than any other decay, because of the very few microbes. Evaluation I think my experiment went well, because I got some conclusive results, which are relevant to what I said in my prediction. And my results also are backed up by fact from my textbook and the Internet. But I could have improved my experiment by adding more soils into my experiment, which would have given me a better range of results. ...read more.


This is because the area is untouched by humans which has had the chance to build up layers of very fertile soil, which produces a lot of nitrogen. Nitrogen is a natural fertiliser. If combined with oxygen it will cause the plant to flourish. So I think I have proven this theory with my investigation. I could extend the work I have done already, by using a larger range of soil types and also look at where each soil type came from and look to see if there is a reflection in the amount of decay compared to where each soil type came from. This would give my investigation a larger range of results and provide additional evidence to prove the theory of the more nitrogen in the soil the more microbial decay. I could also try extending my investigation by measuring the amount of nitrogen using a soil sample, for each of the soil types and then comparing the results against each other to see if the results are relative to each other. This would give me a definite answer to see if the theory of more nitrogen equals more microbial decay is true. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Radioactivity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Radioactivity essays

  1. To model the sample of radioactivity decay on material, using dice.

    I had to do this for all the numbers, find a of them and subtract that. I repeated this until I got to the 15th term. The probability curve is used to model decay because, drawn with accurate calculations it gives a clear picture of what a proper radioactive decay graph should look like.

  2. Do Mobile Phones Cause Brain Tumours

    It was written in January of 2007. It is not a biased source as it is from a newspaper without an agenda. A book made up of multiple news articles and writings on issues to do with cancer. The source I am using is an article from the Daily Mail.

  1. What radon is and how it is formed by radioactive decay

    Examples: * Crawlspaces * Sump pits and floor drains * Bathroom rough-in (gravel) * Wall-to-floor joints * Cracks in floors or walls * Hollow uncapped concrete blocks * Expansion control cuts * Gaps around service pipes For caulking, we recommend self-leveling polyurethane caulk.

  2. Atomic Theory of Matter.

    Many other isotopes of the various elements are radioactive. They can give off radiation of different kinds, changing to other elements or to different isotopes of the same element. Many radioactive isotopes are man-made, produced in nuclear reactors and accelerators. In addition to the 92 naturally occurring elements, scientists have synthesized more than a dozen others that are not found in nature.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work