""'Promising results of Mapping "'via remote sensing technique could be used by the Government of Iraq to monitor the saline areas and determine the productivity of land to guide the ongoing investment by the Government of Iraq based on strategic analysis of the soil salinity problem;
12.
Support for this theory comes from the idea that the returns gained by traders from the sale s price of slaves were offset by both the fall in the value of land that resulted from the subsequent decrease in the marginal productivity of land and the fall in the price of output, which occurred due to the increase in market size as given by westward expansion.