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Evaluation · Q7

Q.What are the parameters used to measure growth of plants?

Tamil Nadu DgeTextbookSubjectiveImportance★★★★★
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Step 1. Because growth is a slow, continuous process, it needs to be tracked through measurable proxies rather than observed directly.

Step 2. The first parameter is an increase in length or girth, used mainly for axial organs like roots and stems, and measurable with tools such as the arc auxanometer or direct ink-mark methods.

Step 3. The second parameter is an increase in fresh or dry weight of the tissue, giving a mass-based measure of growth that accounts for the accumulation of new material, not just linear extension.

Step 4. The third parameter is an increase in area or volume, particularly useful for organs like fruits and leaves whose growth is not well captured by a single length measurement. …

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