Question

Given below are statements about the harmful effects of weeds on crop plants.
(i) They interfere while harvesting.
(ii) They help crop plants grow healthily.
(iii) They compete with crop plants for water, nutrients, space, and light.
(iv) They affect plant growth.

Choose the correct statements from above. Which among them is true?

• A. (i), (iii) and (iv)
• B. (iii) only
• C. (iii) and (iv)
• D. (i), (ii), (iii) and (iv)

Answer 1

The correct option is A

(i), (iii) and (iv)

The correct option is A.
Explanation for the correct option:
Statement (i):

1. Weeds are tiny plant species that, when examined in the context of commercial agriculture, stunt the growth of crops by competing with them for nutrients, light, and moisture.
2. Since the farmer's revenues depend on the crops' ability to grow, this is a crucial topic.
3. The traits of weeds include their rapid growth, lack of identified industrial use, competitive growth, toxicity, etc.
4. Some weed species may attract pests, which ensures that they grow more quickly than plants and absorb valuable nutrients from the soil.
5. Weeds can impede harvesting, which is one of its detrimental effects.
6. Weeds hinder plant growth by competing with agricultural plants for water, nutrients, space, and light.
7. The presence of weeds raises the price of agriculture and slows down labor.

Statement (iii):

1. Crop plants and weeds are spatially congruent.
2. They deny access to agricultural plants to limited nutrients, available space, light, and moisture.

Statement (iv):

1. Problematic insects and agricultural illnesses can be found in weeds.
2. Weeds that are still young can obstruct harvesting efforts.
3. Crops that have been harvested with weed seeds develop dockage and are more likely to deteriorate.

Explanation for the incorrect option:
Statement (ii):

1. Weeds prevent plants from developing healthily.
2. They stretch out and grow more quickly.
3. They rob the primary crop of resources by sucking up the soil's nutrients.

Final answer: Statement i, iii, and iv are true.