Question

Some of the problems associated with intensive irrigation include all of the following except

(A) soil salinization.

(B) overfertilization.

(C) land subsidence.

(D) aquifer depletion

Short answer

1. The option “soil salinization” is false.

2. The option “overfertilization” istrue.

3. The option “land subsidence” is false.

4. The option “aquifer depletion” is false.

Step-by-step solution

Irrigation

The method of applying water or other required nutrients to the fields to assist in the production of crops is called irrigation. Surface irrigation, drip irrigation, and sprinkler irrigation are some examples of irrigation.

Intensive irrigation involves the usage of high chemicals, fertilizers, and pesticides. The chemicals deposit in layers of soil and also decrease the fertility of the soil.

Explanation of option (A)

The accumulation of salt content in the soil is known as salinization. Intensive irrigation leads to the deposition of salts in the ground.

Therefore, salinization is harmful to the growth of the plants and also affects the soil quality.

Thus, the given option is false.

Explanation of option (B)

When soil is rich with humus, micro, and macronutrients, it is called fertile soil. Overfertilization occurs when commercial fertilizers are added to the crop field.

Therefore, overfertilization does not occur due to intensive irrigation.

Thus, the given option is true.

Explanation of option (C)

Land subsidence in crop fields occurs due to excessive farming. It is one of the results of intensive irrigation.

Therefore, land subsidence is caused due to intensive farming, which includes an intensive irrigation system.

Thus, the given option is false.

Explanation of option (D)

The withdrawal of water from the ground for irrigation is the primary cause of aquifer depletion.

Therefore, aquifer depletion is the result of intensive irrigation, which impacts the precipitation of the water cycle.

Thus, the given option is false.