what is the difference between old growth and secondary growth?
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Second-growth stands are ecologically much different from old-growth stands because after 20–30 years, the stands often reach the stem exclusion stage where pole-sized trees grow so tightly packed that light does not reach the forest floor, and understory forage does not grow.
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Secondary succession is one of the two types ecological succession of a plants life. As opposed to the first, primary succession, secondary succession is a process started by an event (e.g. forest fire, harvesting, hurricane, etc.)
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Linear growth is always at the same rate, whereas exponential growth increases in speed over time. A linear function like f(x)=x has a derivative of f'(x)=1 , which means that it has a constant growth rate. ... On the other hand, an exponential function like g(x)=ex has a derivative of g'(x)=ex .
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Easy Annuals The difference is the life cycle. Annual plants germinate, bloom set seed and die all in one year. ... Everything which lasts longer than two years is Perennial, which in practical terms usually means it grows and flowers for many years.
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The increase in length of the shoot and the root is referred to as primary growth. It is the result of cell division in the shoot apical meristem. Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem.
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Studies into extractives (plus anecdotal evidence) going back many years claim that second-growth cedar is less rot resistant than old growth cedar. ... showed that old- and second-growth western red cedar and yellow cedar were the same when it came to decay resistance.
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The difference between Growth and Increase. When used as nouns, growth means an increase in size, number, value, or strength, whereas increase means an amount by which a quantity is increased.
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The secondary sector is the part of the economy that transforms the raw materials into goods for sale or consumption. The tertiary sector is the part of the economy that involves the sale or trade of services instead of goods.
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The difference between growth and development in psychology is that growth indicates a change size while development indicates a change in structure....
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Second-growth forest: A stand of trees resulting from secondary ecological succession. 3. Tree plantation: A managed forest containing only one or two species of trees that are all of the same age.
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Key Differences Between Primary and Secondary Data Primary data is a real-time data whereas secondary data is one which relates to the past. Primary data is collected for addressing the problem at hand while secondary data is collected for purposes other than the problem at hand.
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Eddie W. Linear growth is always at the same rate, whereas exponential growth increases in speed over time. ... This means that as x gets larger, the derivative also increases along with it - meaning that the graph gets steeper and the growth rate gets faster. In fact, the growth rate continues to increase forever.
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Primary and secondary tillage Primary tillage is usually conducted after the last harvest, when the soil is wet enough to allow plowing but also allows good traction. ... Secondary tillage is any subsequent tillage, in order to incorporate fertilizers, reduce the soil to a finer tilth, level the surface, or control weeds.
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Internal growth or organic growth is when you use in-house operations to grow a firm. ... External or inorganic growth is when a firm engages in Mergers and acquisition to grow. This is often faster than building a product, technology, brand, considerable market-share or other competitive advantage from scratch.
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Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field.
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The main difference is the way each respective treatment is processed. Primary treatment works on sedimentation, where solids separate from the water through several different tanks. In contrast, secondary treatment uses aeration, biofiltration and the interaction of waste throughout its process.
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The metabolites which are required for the growth and maintenance of cellular function are called primary metabolites, while such metabolites which are not required for the growth and maintenance of the cellular functions and are the end products of the primary metabolism are called as secondary metabolites.