To determine which question can best be addressed using the available data, we need to consider what specific data on earthworms, plowing, and possibly other factors (like season) you might have.
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What is the impact of plowing soil on the number of earthworms? - This question is directly related to the presence or absence of earthworms in plowed versus unplowed soil, which could be measured if your data includes counts of earthworms in different conditions.
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What is the impact of plowing on the speed of growth of the earthworms? - This question requires data on the growth rates of earthworms under different conditions, which may not be as straightforward unless growth metrics are included in your data.
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Does season have an impact on the size of the earthworms? - This question pertains to size variation based on seasonal changes, which would require data on earthworm sizes across different seasons.
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Does plowing have an impact on the size of the earthworms? - Similar to the growth rate, this question requires data on the size of earthworms in plowed versus unplowed conditions.
Based on typical agricultural or ecological studies, if your data includes counts of earthworms in varied conditions, the best question you could address would be:
What is the impact of plowing soil on the number of earthworms?
This question is the most straightforward to answer if you have specific data related to earthworm counts in relation to plowing practices.
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