Effect of Fertilizer Type on Plant Growth

Easy Research Summaries Experimental Design

A group of researchers conducted an experiment to determine the effect of fertilizer type on plant growth. They set up three groups of plants, each receiving a different type of fertilizer (A, B, or C) while keeping all other conditions constant, such as water, sunlight, and soil type. After 6 weeks, they measured the height of the plants and recorded the data.

Based on the design of this experiment, which aspect is critical to ensuring the results are valid and reliable?

Using three different species of plants for each fertilizer.

Keeping the conditions of sunlight and soil consistent across all groups.

Measuring the heights only after 4 weeks.

Conducting the experiment only during summer.

Hint

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