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W.I. (Weed Index) is calculated as
Question

W.I. (Weed Index) is calculated as

A.

(Yield under weed-free ÷ Yield under weedy) × 100

B.

(Yield under weedy – Yield under weed-free)/Yield under weed-free × 100

C.

(Yield loss ÷ weed population) × 100

D.

None of these

Correct option is B


Weed Index formula:


Why other options are wrong
· (a) Ratio is incorrect; gives misleading values.
· (c) Weed population not part of WI formula.

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