Why did the allies capture so few japanese soldiers when they attacked iwo jima

I believe the answer is: The Japanese had planned for no surviving prisoners

Compared to the allies army, the japanese soldiers were notoriously known for bearing high honours in sacrificing their life for their country.

This make their commanders tend to make plan to abandon all prisoners and many of the cornered Japanese soldiers still choose to fight and shoot despite being cornered. This make capturing japanese soldiers become a really huge burden for the allies forces.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.