BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 31, Problem 11RQ
What is the term used to describe the solid rock that lies beneath the soil?
- sand
- bedrock
- clay
- loam
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Interpret the soil triangle. What percentage of clay,
silt, and sand does the soil type contain (indicated by a
yellow star)?
10
20
% CLAY
50
60
80
90
100
01
20
70
CLAY
30
40
% SILT
SANDY
SILTY
CLAY
60
40
CLAY
SILTY
CLAY LOAM
30
CLAY LOAM
SANDY
CLAY LOAM
SANDY LOAM
70
80
LOAM
SILT LOAM
SILT
40
ㅎ
SAND
LOAMY
SAND
100
%
ㅎ
% SAND
Soil particles are arranged in order of increasing size are
A. sand, silt and clayB. silt, sand and clayC.clay, sand and siltD.clay, silt and sand
Describe the three types of soil: Sand, Silt, and Clay
Chapter 31 Solutions
BIOLOGY 2E
Ch. 31 - Figure 31.6 Soil compaction can result when soil...Ch. 31 - Figure 31.7 Which horizon is considered the...Ch. 31 - Figure 31.10 Farmers often rotate corn (a cereal...Ch. 31 - For an element to be regarded as essential, all of...Ch. 31 - The nutrient that is part of carbohydrates,...Ch. 31 - Most ____ are necessary for enzyme function....Ch. 31 - What is the main water source for land plants?...Ch. 31 - Which factors affect soil quality? chemical...Ch. 31 - Soil particles that are 0.1 to 2 mm in diameter...Ch. 31 - A soil consists of layers called that taken...
Ch. 31 - What is the term used to describe the solid rock...Ch. 31 - Which process produces an inorganic compound that...Ch. 31 - Through mycorrhization, a plant obtains important...Ch. 31 - What term describes a plant that requires...Ch. 31 - What is the term for the symbiotic association...Ch. 31 - What type of plant problems result from nitrogen...Ch. 31 - Research the life of Jan Babtista van Helmont What...Ch. 31 - List two essential macronutrients and two...Ch. 31 - Describe the main differences between a mineral...Ch. 31 - Name and briefly explain the factors that affect...Ch. 31 - Describe how topography influences the...Ch. 31 - Why is biological nitrogen fixation an...Ch. 31 - What is the main difference, from an energy point...Ch. 31 - Why is a root nodule a nutritional adaptation of a...
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- How 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_forwardRI GİRTEN K Which of the following is not true for Soil Organic Matter (SOM)? O It can be degraded by microbes OIt holds water for plants It is integral to maintaining the soil structure OIt makes up a large proportion of soil structure OIt is important for retaining nutrients in the soilarrow_forwardWrite T on the blank provided if the statement is correct. If it is false, underline and replace the word(s) with the word(s) that will make the statement true. Calcium carbonate is highly soluble in water in which calcium element is easily release to correct soil pH. The degree of fineness of lime is not dependent to the speed of checking soil acidity. Carbon is released back to the atmosphere during decomposition of organic materials. Mineralization of nitrogen decreases if the water filled pore space is below 50%. Soil carbon mineralization increases as the moisture content of the soil increases to a certain level and may drop if soil is fully saturated with water. Nitrifying bacteria that obtain carbon from carbon dioxide prefer reduced zone to nitrify nitrogen to available form.arrow_forward
- Would the particle density of a soil high in organic matter be the same? Higher or Lower? Why?arrow_forwardA soil consists of layers called that taken together are called a ________. soil profiles : horizon horizons : soil profile horizons : humus humus : soil profilearrow_forwardFigure 31.7 Which horizon is considered the topsoil, and which is considered the subsoil?arrow_forward
- Figure 31.6 Soil compaction can result when soil is compressed by heavy machinery or even foot traffic. How might this compaction change the soil composition?arrow_forwardThe heat capacity of a soil is the amount of heat that it must absorb or lose to produce a one-degree change in its temperature. Group of answer choices True Falsearrow_forwardDescribe the process of soil formation for one of the following: Tundra soil, Tropical forest soil or Prairie/grassland soil. The answer should address the impact of vegetation accumulation, impact of temperature and precipitation on the formation. You should also note the soil characteristics and reasons for them in relation to your choice.arrow_forward
- Analyze each statement (A and B) whether they are true or false. Use the choices below in answering each item; A statement A is true B statement B is true C both A and B are true D neither A nor B are true (A) A soil with low particle density contains low levels of organic matter. (B) A soil with high particle density contains high levels of organic matter.arrow_forwardSoil particles may be held together by which of the following to form aggregates? Group of answer choices a) Humus b) Clay c) Iron Oxides d) All of the above e. None of the abovearrow_forwardAn extremely acid soil generally limits the availability of many nutrients in the soil. True or Falsearrow_forward
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