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Questions and Answers
Which statement correctly differentiates land from soil?
Which statement correctly differentiates land from soil?
- Land is more important for plant growth than soil.
- Land is a non-renewable resource, while soil can be regenerated.
- Soil is primarily composed of weathered rocks, while land includes various elements like climate and vegetation. (correct)
- Soil covers the entire surface of the earth, while land includes areas permanently covered by water.
What is indicated by the term 'land cover'?
What is indicated by the term 'land cover'?
- The legal designation of land ownership and use.
- The physical material present at the earth's surface, such as vegetation and asphalt. (correct)
- The methods through which land is utilized by humans.
- The economic value assigned to various types of land.
Which of the following best describes a watershed?
Which of the following best describes a watershed?
- A geographic zone that houses various species of vegetation.
- An area characterized by its urban land use and human activities.
- A piece of land identified for agricultural purposes only.
- A geographical area that drains to a common point or outlet. (correct)
What distinguishes land use from land cover?
What distinguishes land use from land cover?
Why is soil considered a non-renewable resource?
Why is soil considered a non-renewable resource?
What is NOT considered a permanent characteristic of land?
What is NOT considered a permanent characteristic of land?
Which of the following factors does NOT determine land capability?
Which of the following factors does NOT determine land capability?
Land suitable for cultivation falls under which land suitability group?
Land suitable for cultivation falls under which land suitability group?
Which land capability class indicates increasing limitations for land use?
Which land capability class indicates increasing limitations for land use?
What symbol is used to indicate excess water or wetness as a limitation?
What symbol is used to indicate excess water or wetness as a limitation?
Which of the following characteristics is an internal or inherent soil feature?
Which of the following characteristics is an internal or inherent soil feature?
What is the final step in land capability classification referred to as?
What is the final step in land capability classification referred to as?
Under which condition should soils in a capability unit produce similar potential productivity?
Under which condition should soils in a capability unit produce similar potential productivity?
What slope class corresponds to a range of 10-15%?
What slope class corresponds to a range of 10-15%?
Which erosion class is associated with moderate erosion characterized by sheet and rill?
Which erosion class is associated with moderate erosion characterized by sheet and rill?
What proposed LC class is assigned to a slope class with a range of 3-5%?
What proposed LC class is assigned to a slope class with a range of 3-5%?
Which class of slope has a range of slope greater than 100%?
Which class of slope has a range of slope greater than 100%?
What is the erosion class code for no erosion or slight erosion?
What is the erosion class code for no erosion or slight erosion?
Which slope class is associated with a 0-1% slope range?
Which slope class is associated with a 0-1% slope range?
What proposed LC class does severe erosion belong to?
What proposed LC class does severe erosion belong to?
What slope class has a range of 5-10%?
What slope class has a range of 5-10%?
What is the land capability classification for table lands with a slope of 3-5% located more than 6 meters from the gully rim?
What is the land capability classification for table lands with a slope of 3-5% located more than 6 meters from the gully rim?
Which of the following describes a semi-arid climate?
Which of the following describes a semi-arid climate?
What is the most accurate description of land with excessive wetness?
What is the most accurate description of land with excessive wetness?
What land capability classification would you assign to marginal land with a slope of 0-15% located 9 meters from the gully rim?
What land capability classification would you assign to marginal land with a slope of 0-15% located 9 meters from the gully rim?
Which salinity and alkalinity category corresponds to land that exhibits slight salinity?
Which salinity and alkalinity category corresponds to land that exhibits slight salinity?
What type of land is classified as Class I with a slope between 0-1%?
What type of land is classified as Class I with a slope between 0-1%?
Which feature characterizes a very severe erosion classification?
Which feature characterizes a very severe erosion classification?
Which classification refers to land characterized by a slope of 1-3% and more than 60m from the gully?
Which classification refers to land characterized by a slope of 1-3% and more than 60m from the gully?
What method is used to determine the texture of top soil?
What method is used to determine the texture of top soil?
Which land capability class has a slope of 0-1%?
Which land capability class has a slope of 0-1%?
Which of the following soil textures can belong to Class II?
Which of the following soil textures can belong to Class II?
How is erosion hazard assessed according to the provided classification system?
How is erosion hazard assessed according to the provided classification system?
Which characteristic does NOT apply to Class IV soils?
Which characteristic does NOT apply to Class IV soils?
Determine the correct mapping unit for silty clay with a depth greater than 90 cm.
Determine the correct mapping unit for silty clay with a depth greater than 90 cm.
Which class has the least severe erosion hazard in the classification table?
Which class has the least severe erosion hazard in the classification table?
The soil depth classification for Class III ranges from?
The soil depth classification for Class III ranges from?
What type of land capability class could have severe erosion hazard (e3)?
What type of land capability class could have severe erosion hazard (e3)?
Which mapping unit represents a land slope of 5-10%?
Which mapping unit represents a land slope of 5-10%?
Which color is associated with a Class II land capability?
Which color is associated with a Class II land capability?
What is the mapping color indicating land with very far distance from active gully heads?
What is the mapping color indicating land with very far distance from active gully heads?
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Study Notes
Land vs. Soil
- Land: An area of ground that is not permanently covered by water.
- Soil: Material on the upper earth crust primarily used for growing plants.
- Watershed: A geographical area draining to a common point.
Land use vs. Land cover
- Land cover: The physical material at the surface of the earth (e.g., grass, asphalt, trees).
- Land use: How people utilize the land.
Factors determining land capability
- External features of land: Slope, erosion features, water-logging.
- Internal/Inherent soil characteristics: Surface soil texture, effective soil depth, permeability, drainage, salinity, alkalinity, fertility.
- Environmental factors: Rainfall, temperature, wind velocity, evapotranspiration.
Land capability classification
- Land suitability group:
- Land suitable for cultivation
- Land not suitable for cultivation
- Land capability classes: I, II, III, IV, V, VI, VII, VIII - Increasing intensity of hazard and limitations of land use.
- Classes I-IV are suitable for cultivation.
- Classes V-VIII are not suitable for cultivation.
- Sub-classes: Kind of limitation/ problem
- Erosion and runoff (e)
- Excess water/ wetness (w)
- Root zone limitation (s)
- Climatic limitations (c)
- Land capability units: The final step in the land capability classification. Land with similar management requirements and conservation treatment under the same kind and condition of vegetation is designated as a land capability unit.
- Similar crops and pasture can be grown with similar management practices.
- Similar conservation treatment and management are required.
- Have comparable potential productivity.
Mapping units or symbols
- Information for classification is recorded as mapping units: Soil series, texture of topsoil, effective soil depth, land slope, erosion hazard.
- Mapping units can also be written as: Texture - depth, slope - erosion.
- Mapping unit examples:
- loam (l) -d4: Soil texture - loam, Effective soil depth - 45-90 cm (d4)
- A – e1: Slope - 0-1% (A), Erosion hazard - Absent/very slight (e1)
Rating table for land capability classification
- Attributes evaluated: Soil texture, soil depth, slope, erosion status, other attributes (e.g., climate, conductivity).
- Classes and corresponding mapping units:
- I: sicl, cl, l, sl, sil, scl, >90 cm (d5), 0-1%, e1, Humid with well distributed rainfall
- II: sicl, cl, sl, sil, scl, 45-90 cm (d4), 1-3%, e1, Humid with occasional dry spell, sub-humid
- III: sc, sic, c, ls, 22.5-45 cm (d3), 3-5%, e2, Sub-humid, semi-arid
- IV: s, c, 7.5-22.5 cm (d2), 10-15%, e3, Semi arid and arid
- Slope classes: A (0-1%), B (1-3%), C (3-5%), D (5-10%), E (10-15%), F (15-25%), G (25- 33%), H (33-50%), I (50-100%), J (>100%)
- Erosion classes: e1 (No or slight erosion), e2 (Moderate erosion), e3 (Severe erosion), e4 (Very severe erosion)
Land capability classification in ravine lands
- Land form:
- Table land
- Wide humps in between wide gullies
- Marginal land between the gully rim and LCC for ravine
- Slope: 0-15%
- Distance from gully rim: >60 m, 6-60 m, ≤ 6 m
- Land capability class: I, II, III, IV, VI
Land capability classification mapping units
- Boundaries of the area are delineated with black lines.Â
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