EP BIOLOGY:SCIENCE F/LIFE...-MOD.ACCESS
6th Edition
ISBN: 9780134839530
Author: BELK
Publisher: PEARSON CO
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Chapter 25, Problem 9LTB
Summary Introduction
Introduction:
Soil is created by the breakdown of rocks and the accumulation of organic matter from dead, decaying plants and animal remains. A healthy soil is made up of a bottom layer of eroded rocks, the top layer of organic materials and a middle layer in which the components of top and base layers are mixed by earthworms and other soil organisms.
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Students have asked these similar questions
The most important flux (largest) in a non-carbon nutrient cycle is
Biological fixation
None of these
Decomposition
Weathering
Non-biological fixation
Plant growth is limited by available nitrogen. Why is nitrogen fixation a limiting factor?
There is very little nitrogen available after fossil fuel combustion utilizes the available nitrogen.
Nitrogen must be produced by bacteria due to the inability of recycling by decomposers.
There is no nitrogen in the atmosphere; it is only found in aquatic biomes.
The stability of nitrogen gas makes it difficult to turn into nitrogen for living things.
Human Activity
Effects on Soil Quality
Effects on Soil Quantity
Chapter 25 Solutions
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? * To increase water retention. Nitrogen-fixing plants are not a food crop. To increases usable nitrogen in the soil. To decrease bacteria in the soil.arrow_forwardPlants absorb dissolved nitrates from soil and convert them into : Free nitrogen Urea Proteins Ammoniaarrow_forwardCompared to traditional tillage, conservation tillage reduces topsoil erosion accelerates water loss from the soil causes soil compaction does not require herbicides reduces the amount of carbon stored in the groundarrow_forward
- What is the importance of decomposition to nutrient cycling?arrow_forwardThe limiting nutrient in an ecosystem is the nutrient; that is the most scarce nutrient that is needed for more growth to occur that is limited however is not needed by many organisms in the system is almost always carbon dioxide is almost always nitrogen gasarrow_forwardA shortage of phosphorus in the soil would make it difficult for a plant to makearrow_forward
- Which of the following best describes how using fertilizer would affect the nitrogen cycle? The use of fertilizer would result in more nitrogen in the groundwater. The use of fertilizer would result in less nitrogen in the soil. The use of fertilizer would result in more phosphorus in the soil. The use of fertilizer would result in more nitrogen being added to the carbon cycle.arrow_forwardDuring biological nitrogen fixation, microbial plant symbionts uptake_________and converted it to__________?arrow_forwardWhy is the phosphorus cycle different from the nitrogen cyclearrow_forward
- The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relatiorhip, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? * To increase water retention. O Nitrogen-fixing plants are not a food crop. To increases usable nitrogen in the soil. To decrease bacteria in the soil.arrow_forwardThe uptake of phosphorus and nitrogen by plants is aided by ________ in terrestrial systems. precipitation temperature Rhizobia bacteria mycorrhizal fungiarrow_forwardHow can soil erosion lead to desertification? It reduces the level of organic matter It promotes flooding that destroys vegetation It promotes salinization that destroys soil structure Which of the following is not a factor that may lead to urban sprawl? Pollution Immigration Overpopulation Which statement is NOT true about soil salinization? Soil dehydrates due to decrease in accumulation of water underground. Starts by attempting to wash the salts out of the topsoil by pumping more water. Results to the damage and killing of plants as saline water surrounds its deep roots. Which would most likely happen if too much nutrient entered a freshwater ecosystem? Algae will decrease, leaving few food resources, for fish. Nutrients would sink to the bottom, increasing soil deposition. Algae breakdown lowers dissolved oxygen, causing fish to suffocate.arrow_forward
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