The uppermost part of a soil profile is also called the organic layer which is enriched in organic materials. Hence, the region with the greatest concentration of organic material is the Top layer(A)
- The Upper layer of a soil profile consists of materials such as <em>plant roots, bacteria and fungi</em> which constitutes it's richness in organic materials.
- These layer is usually very dark and plants derive a lot of nutrient ’s required for growth here.
Hence, the top layer has the greatest concentration of organic materials.
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Answer:
A. Canada
Explanation:
Canada and Greenland are both countries that are not the best ones when it comes to farming. If we have to choose between them which one provides better conditions and higher profit, then that would be Canada with no doubt. Even though the climate is a huge limiting factor for the farming in Canada, in its southernmost parts it is still possible for certain types of crops such as the barley, oats, wheat, and flaxseeds. The farms are not widespread though, and they are localized only at certain parts of the southern part of the country. Greenland, on the other hand, is a country where the farming is pretty much impossible for anything. The climate in Greenland is polar, with most of the island being constantly covered with ice. The temperatures are very low throughout all of the year, the soil is either nonexistent or very thin and poor, so the crops simply can not survive there, yet alone to bring in profit.
Answer:
Transitional Stage
Explanation:
Declining death rates due to increased food production and improved medical care while birth rates remain high is characteristic of the TRANSITIONAL stage of the demographic transition.
The human population continues to increase at this point because of rising birth rates and declining death rates. The death rates are declining as there are changes in the economy and social conditions as the country transforms into an developed society.
The theory of demographic change is a theoretical explanation of rising mortality, fertility, and rates of growth as populations shift from one demographic system to another.
Answer:
It allowed land-grant colleges to perform experiments in the fields of rural farms.
Explanation:
