Answer:
The principal biophysical constraint for the production of cereals in Ethiopia is land degradation in the form of soil. According to Shiferaw, the rate of soil erosion is severe in the highlands of Ethiopia. Rapid population growth, cultivation on steep slopes, clearing of vegetation, and overgrazing are identified as the main factors that accelerate soil erosion in Ethiopia Biophysical effects of climate change on the production of cereals are claimed to be positive in some agricultural systems and regions, and negative in others, and these effects are claimed to vary over time. In a nutshell, The direct and indirect effects of climate change on agriculture play out through the economic system, altering prices, production, productivity, food demand, calorie availability, and, ultimately, human well-being.
The production and flow of cereals in Ethiopia are constrained by socio-economic constraints like poor infrastructure (constraining access to both agricultural inputs and markets for outputs), dominance by small-scale resource-poor farmers, shortage of draft power, low level of modern farm inputs; inefficient working habit (less working days per week) of the peasants; substantial increase in food prices; and endemic poverty, limited access tocapital and global markets, ecosystem degradation, complex disasters like war and conflicts; population growth. For instance, the availability of financial services is constraining the capacity of smallholders and emerging commercial farmers to adopt improvedagricultural practices. This includes both short-term seasonal credit for crop inputs and medium-longer-term finance for capital investments.
I think the correct answer is wetland and plants
When scientists use the law of superposition to determine the age of a fossil, they go by the principle of 'every undisturbed layer of rock is older than the layer above it. This is not the most precise way of determining age, and in fact this method can only reveal the approximate age, but not the exact one.
Drought and desertification are closely related phenomena. Persisting over months or years, drought can affect large areas and may have serious environmental, social and economic impacts. While drought is a natural phenomenon, whose impacts can be exacerbated by human activities that are not adapted to the local climate, land degradation is the process of turning fertile land into less or non-productive land. In extreme cases in drylands this is called desertification. Land degradation and desertification are complex phenomena driven by un-adapted human activity in combination with land and climatic constraints. Inappropriate land use, such as monocultures, and unsustainable land management practices, such as deforestation, unsuitable agricultural practices and overexploitation of water resources), can cause land degradation that can be further aggravated by drought.
Answer:
<em>d. Tundra</em>
Explanation:
Tundra <em>is a sort of biome in physical geography, where cold temperatures and short growing seasons hinder the growth of the plant.</em>
This consists of dwarf shrubs, sedges and grasses, mosses and lichens. In some tundra areas, scattered trees are growing.
The tundra-forest ecotone (or ecological boundary region) is called the tree line or timberline.
