Independent Variable: Type of fertilizer (e.g., organic fertilizer, chemical fertilizer, control group with no fertilizer)
Dependent Variable: Growth of tomato plants (e.g., height, number of leaves, weight of fruits)
Controlled Variables (Constants):
1. Number of tomato plants used for each group.
2. Same species and age of tomato plants.
3. Same amount of water given to each group.
4. Same amount of sunlight exposure.
5. Same soil type and quality.
6. Same temperature and humidity conditions.
Experimental Group: Different groups receiving different types of fertilizers – organic and chemical fertilizer groups.
Control Group: A group of tomato plants that do not receive any fertilizer, i.e., plants grown under natural conditions.
Experimental Outline:
1. Select the same number of tomato plants with similar age and size.
2. Divide the tomato plants into different groups based on the type of fertilizer they will receive.
3. Label each group as per the fertilizers used (e.g., Group A – organic fertilizer, Group B – chemical fertilizer, Group C – control group).
4. Ensure all tomato plants are grown in similar pots or containers filled with the same kind and quality of soil.
5. Provide the same amount of sunlight exposure to all the groups, either by placing them in a greenhouse or by using UV lamps.
6. Water all the tomato plants with the same amount of water regularly, as per the specific needs of tomato plants.
7. Apply the organic fertilizer to Group A, the chemical fertilizer to Group B, and no fertilizer to Group C (the control group).
8. Measure and record the growth parameters at regular time intervals (e.g., weekly) for a fixed duration, such as 6 weeks.
9. Measure the height of the tomato plants using a ruler or measuring tape.
10. Count the number of leaves on each plant and record the average number for each group.
11. At the end of the experiment, collect and record the weight of the fruits produced by each plant.
12. Analyze the data collected and compare the growth parameters (height, number of leaves, weight of fruits) among the different groups.
13. Draw conclusions based on the observed differences and determine the impact of different types of fertilizers on tomato plant growth.
Design an experiment to investigate the impact of different types of fertilizers on the growth of tomato plants. In your outline, include the following types of variables :
Independent Variable
Dependent Variable
Controlled Variables (Constants)
Experimental Group
Control Group
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