What have farmers in the amazon river basin found to be the cause of reductions in the soil's fertility? ( a) the scarcity of tractors and modern farm equipment ( b ) constant intervention on the part of environmental groups ( c ) a lack of effort to farm the land ( d ) the removal of native plants

Farmers in the Amazon River Basin have blamed mining and D. the removal of native plants for the cause of reduction in soil fertility. When the rain forest was cleared of vegetation it took all the nutrients from the soil with it.

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.