What is the weight of 100 seeds of a crop called?

✅Explanation:
-Seed index: This is a measure of seed size and weight, typically expressed as the average dry weight of 100 seeds. It's a useful indicator for crop establishment, seed quality, and potential yield.

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📌Other Options Explanations:
-(a) Test weight: This refers to the weight of a specific volume of grain or seeds, often used for assessing grain quality after harvest.
-(b) Sink weight: This might be relevant in seed quality testing, but it refers to the weight of seeds that sink in a specific solution.
-(d) Seed rate: This is the amount of seed used for planting a specific area, s.