How does soil salinization occur?
What will be an ideal response?
Soil salinization occurs primarily in arid areas that are being irrigated. Either the irrigation water already contains high concentrations of salts or the irrigation water dissolves them from highly mineralized soils. Both situations are possible. Salinization is the result of wasteful irrigation techniques that put more water in the field than the crops can absorb. The excess water is left to evaporate. As the water evaporates, the dissolved mineral load is precipitated in the soil. This leaves behind a solid crust of salt that inhibits plant growth.
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On a 500 hPa chart, why does middle-latitude cyclone development occur beneath troughs rather than ridges?
What will be an ideal response?
Convergent plate boundaries are characterized by formation of new oceanic crust. Indicate whether the statement is true or false
A fathom is a unit of ________.
A. weight B. speed C. depth D. distance E. time
Shift of power from Kievan Rus as the center of power in Northern Eurasia to Moscow over time was a shift toward the:
A) north B) south C) west D) far east