... take note of the pH. Light meter- needed to record the light intensity, and to see if light is a factor, which affects my investigation. 30 cm ruler- used the measure the soil depth when using the soil pin, as centimetres is more accurate than greater measurement units. Pilot Study: I will carry out this investigation, by taking into consideration all the risks and precautions. I will also make sure that I carry out a fair test in order to provide me with accurate and reliable results. I will undertake the ethical implications of the living organisms and the environment. In order to carry out this investigation I will make sure that my apparatus and materials are handled knowledgeably. I will also make sure that my investigation is well organised and carried out in a systematic manner. It will be important for me to consider safety aspects. Repeating my experiment at least ...

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