Leaching
Soil nutrients are lost to lower horizons during the leaching processes. The nutrients percolate into the horizon B. Mineral elements like nitrates, potassium, magnesium and sulphate are lost through this percolation. This is why farmers use fertilizers to replenish the lost content.
Continuous cropping
This involves the growing crops on the same piece of land from season to season. The land is not allowed to rest. The soil becomes exhausted because the crops continue sucking the nutrients.
Change of pH
The applications of fertilizers on land continuously may affect the soil pH value. The acidity of soils is increased by ammonium based fertilizers like ammonium nitrate or sulphate. This increased acidity interferes with the activities of some microorganisms like bacteria and fungi.
Faimus answered the question on March 17, 2018 at 09:09
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(a) What is soil catena
(b) What is soil degeneration
(c) Describe any three causes of soil degeneration
(Solved)
(a) What is soil catena
(b) What is soil degeneration
(c) Describe any three causes of soil degeneration
Date posted:
March 17, 2018
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Answers (1)
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(a) What is soil profile
(b) Name and describe the four soil layers
(Solved)
(a) What is soil profile
(b) Name and describe the four soil layers
Date posted:
March 16, 2018
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Answers (1)
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(a) Describe the following terms associated with soils Soil texture, Soil porosity, Soil permeability (b) What is the importance of soil acidity
(Solved)
(a) Describe the following terms associated with soils
Soil texture
Soil porosity
Soil permeability
(b) What is the importance of soil acidity
Date posted:
March 16, 2018
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Answers (1)
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The main factors influencing soil formation are the nature of the parent rock and climate. Briefly describe how these factors influence soil formation.
(Solved)
The main factors influencing soil formation are the nature of the parent rock and climate. Briefly describe how these factors influence soil formation.
Date posted:
March 16, 2018
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Answers (1)
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The following factors influence soil formation. Briefly explain how they influence the formation of soil. Living organisms, Relief, Time
(Solved)
The following factors influence soil formation. Briefly explain how they influence the formation of soil.
Living organisms
Relief
Time
Date posted:
March 16, 2018
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Answers (1)
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(a) Describe the following leaching processes leading to the formation of various soil types. Ferralisation, Eluviation, Illuviation, Podzolisation, Calcification, Ribification, Salinisation (b) Differentiate between eluviation and illuviation.
(Solved)
(a) Describe the following leaching processes leading to the formation of various soil types.
Ferralisation
Eluviation
Illuviation
Podzolisation
Calcification
Ribification
Salinisation
(b) Differentiate between eluviation and illuviation.
Date posted:
March 16, 2018
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Answers (1)
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Formation of soil through decomposition of organic matter takes place in two stages. Describe them.
(Solved)
Formation of soil through decomposition of organic matter takes place in two stages. Describe them.
Date posted:
March 16, 2018
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Answers (1)
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Give the three processes in which soil is formed.
(Solved)
Give the three processes in which soil is formed.
Date posted:
March 16, 2018
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Answers (1)
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Give any five reasons why humus content in soil is important.
(Solved)
Give any five reasons why humus content in soil is important.
Date posted:
March 16, 2018
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Answers (1)
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Give any three ways in which glacial features are not useful.
(Solved)
Give any three ways in which glacial features are not useful.
Date posted:
March 16, 2018
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Answers (1)
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Give five ways in which glacial features are of significant use.
(Solved)
Give five ways in which glacial features are of significant use.
Date posted:
March 16, 2018
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Answers (1)
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Describe the formation of an outwash plain
(Solved)
Describe the formation of an outwash plain
Date posted:
March 16, 2018
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Answers (1)
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(a) Describe the formation of kames
(b) Describe the formation of eskers
(Solved)
(a) Describe the formation of kames
(b) Describe the formation of eskers
Date posted:
March 16, 2018
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Answers (1)
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(a) Describe the following glacial features
Boulder train
Terminal moraine
Drumlins
(b) Give an example of a boulder train
(Solved)
(a) Describe the following glacial features
Boulder train
Terminal moraine
Drumlins
(b) Give an example of a boulder train
Date posted:
March 14, 2018
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Answers (1)
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(a) What is till
(b) Describe the two types of till
(c) Describe the features that are formed as a result of till
(Solved)
(a) What is till
(b) Describe the two types of till
(c) Describe the features that are formed as a result of till
Date posted:
March 14, 2018
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Answers (1)
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Name any three resultant features of glaciation in lowland areas
(Solved)
Name any three resultant features of glaciation in lowland areas
Date posted:
March 14, 2018
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Answers (1)
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Describe the formation of a rock basin
(Solved)
Describe the formation of a rock basin
Date posted:
March 14, 2018
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Answers (1)
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Give an example of a waterfall formed as a result of a hanging valley.
(Solved)
Give an example of a waterfall formed as a result of a hanging valley.
Date posted:
March 13, 2018
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Answers (1)
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(a) Describe how ribbon lakes are formed on highlands affected by glaciation
(b) Name any two examples of ribbon lakes
(Solved)
(a) Describe how ribbon lakes are formed on highlands affected by glaciation
(b) Name any two examples of ribbon lakes
Date posted:
March 13, 2018
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Answers (1)
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(a) How many glaciers are on Mount Kenya
(b) Name any two of them
(c) Name any three erosional features found on Mount Kenya
(Solved)
(a) How many glaciers are on Mount Kenya
(b) Name any two of them
(c) Name any three erosional features found on Mount Kenya
Date posted:
March 13, 2018
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Answers (1)