Impact of Soil Type on Flowering Plant Growth

Very Hard Research Summaries Interpreting Results

Researchers conducted a controlled study to evaluate the relationship between different soil types and the growth rates of a particular flowering plant species, Rudbeckia hirta. The study utilized three soil types: sandy soil, loamy soil, and clay soil. Each soil type was tested in three replicates, with identical conditions of sunlight and watering. After a growth period of eight weeks, the researchers recorded the height of the plants as a measure of growth rate.

Below are the average height measurements (in centimeters) at the end of the study:

**Sandy Soil**: 15.2, 16.0, 14.8
**Loamy Soil**: 22.1, 23.0, 21.5
**Clay Soil**: 19.0, 18.5, 19.5

Based on the results, what conclusion can be drawn regarding the impact of soil type on the growth rate of Rudbeckia hirta?

Sandy soil supports the highest growth rate among the soil types.

Clay soil promotes growth rates higher than sandy soil but lower than loamy soil.

All soil types resulted in equal growth rates for <em>Rudbeckia hirta</em>.

Loamy soil significantly enhances the growth rate of <em>Rudbeckia hirta</em> compared to the other soil types.

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