Final answer:
The experiment involves studying the effect of different factors on plant productivity such as temperature, water source, nutrient variation, and light intensity.
Step-by-step explanation:
The experiment involves studying the effect of different factors on plant productivity. Examples include temperature, water source, nutrient variation, and light intensity. These factors can affect net primary productivity, which is the estimation of organic matter available as food for plants. By measuring aboveground biomass or dry mass, we can assess the productivity of plants in different environments.