Question

Based on the different types of land use shown in the image, which of the following best explains why soil salinization is a concern in the arid landscape shown?
A
Forests are being cleared as land is repurposed for agricultural uses, which reduces biodiversity in the region.

B

The land is being farmed so intensively that soil nutrients are degraded to the point that crops will not grow.

C

Irrigation increases the salt content of the soil, which disrupts the growth of crops and degrades soil fertility.

D

Fields are left fallow after being farmed intensively so that nutrients in the soil may be replenished.

E

Multiple crops are being planted in the same field, which increases the chances of pest damage.

Answer 1

Answer:

D. Fields are left fallow after being farmed intensively so that nutrients in the soil may be replenished.

Explanation:

Salinization is the process that promotes the accumulation of Na + and Cl- salts on the soil surface, preventing plants from absorbing important nutrients for their growth and development.

This process happens a lot in arid and semi-arid regions. This is because the amount of rain in these regions is very low, but the evaporation of soil water happens very intensely. Because of this, it is necessary for farmers to establish many irrigation points and as we know the water contains numerous mineral salts.

The amount of irrigation in these soils ends up promoting an accumulation of water in the soil, however as the evaporation is intense, the water evaporates, leaving only its salts in the soil that are accumulating and causing loss of fertility.

In other words, irrigation increases the salt content of the soil, which stops crop growth and decreases soil fertility.