Hello. You forgot to show the description of the experiment. The description of the experiment is attached:
Answer:
The problems were:
- Different species of plants were used.
- The plants were placed in different environments.
- The compost was placed on the plants at different times of plant development.
- Two different compounds were used.
- There was not enough compost for all the plants.
Explanation:
An experiment must be carried out with completely equal resources, elements and factors for all tested objects and variables. In this case, for the experiment to have an efficient result, it would be necessary that the same species of plant be used (since the same species would present the same elements of development). In addition, all plants should be exposed to the same environment and receive the same amount of compost at the same stage of vegetative growth. These things did not happen in this experiment and therefore the results were inaccurate.
