Question

Which of the following are characteristics of weed?

• A. Little or no recognized value in medicine
• B. Rapid growth
• C. Competitive with crops
• D. All of the above

Answer 1

The correct option is D All of the above

Any plant not sown in the field by the farmer and grow where it is not wanted is called a weed.

Characteristics of weeds are as follows:

((1) The weeds seed germinate early and the seedlings grow faster. They being hardy compete with the crop plants and deprive them of light, moisture, and nutrients.

(2) They flower earlier, run to seed in profusion and mature ahead of the crop. They are, therefore, difficult to control and it may be even impossible to eradicate some weeds completely.

(4) They are harmful to crops, cattle, and human beings.

(5) They can survive even under adverse conditions.

(6) They are prolific and have a very high reproductive capacity.

(7) The viability of seeds remains intact, even if they are buried deep in the soil.

(8) The seeds may have special structures like wings, spines, hooks, sticky hairs, etc. on account of which they can be easily disseminated over long distances.

(9) Many weeds like doob are vegetatively propagated and spread rapidly all over the field even under adverse conditions.

Therefore, the correct answer is option D.