The growth of vegetation is dependent on the composition of soil that will meet its nutrient and moisture requirements. The agricultural industry relies on being able to identify these different types of soils, to maximize harvest. This classifies this problem as a macro one because it affects the entire world.
This experiment will entail analyzing different soil samples for their ability to hold moisture, fertility, and PH. I believe that the other two experiments will have a great influence on which plants will grow or not. I believe that characteristics of the soil will affect the growth of vegetation. Some plants will likely thrive on certain soil, but will not on others. I also believe that the PH will have a big influence on the fertility of the plant. It is likely that an acid soil will not be fertile. I think that the soil which has smaller size composition will not let out as much water as the type of soil with bigger size composition; this is for the moisture retention. The independent variables will include soil composition, ability of the soil to hold moisture and the PH balance of the soil. The dependent variable will be the growth of the plants.
Clay used in this experiment Peete Moss used in this experiment
Sand Moraine used in this experiment Potting soil used in this experiment