Question

What have farmers in the Amazon River Basin found to be the cause of reductions in the soil's fertility?

the scarcity of tractors and modern farm equipment
constant intervention on the part of environmental groups
a lack of effort to farm the land
the removal of native plants

Answer 1

Farmers in the Amazon River Basin have blamed mining for the cause of reduction in soil fertility. This part of the river once had large rain forests that were very fertile, if left alone. When the rain forest was cleared of vegetation it took all the nutrients from the soil with it.

Answer 2

so its a

Answer 3

I'd say D. the removal of native plans, the plants gave vegetation, when they were removed the nutrients from the soil was removed too.

Answer 4

ok