What is the purpose of using multiple control groups in an experiment

Explanation:

A control group is a standard group which is used for the purpose of the experiment. It does not receive any manual treatment by the experimenter. Instead it is kept as a standard for comparison of the other variables.

The multiple control groups are used in the experiment so as to increase the accuracy, consistency and reliability of the results. As if one control group contains contaminants it may produce errors in the experiment. To avoid error and enhance error and increase accuracy multiple control groups are used.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

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