16 Questions
What is the purpose of land grading?
To control flow for irrigation and drainage purposes
In land levelling operations, what is the purpose of rough grading?
To remove abrupt irregularities and fill pits and depressions
What is the final operation in land levelling?
Land smoothing
Which terms are synonymous with land levelling?
Land levelling, land grading, land forming
What are the benefits of land grading in unirrigated areas?
Reduction in soil erosion and provision for surface drainage
What is the primary requirement for controlling flow in irrigation and drainage purposes?
Uniform grade without any irregularities
What is the main purpose of a topographic map?
To provide information about the topography of an area
What do U-shaped curves in contour lines indicate?
A summit or hill
What do closed contours with higher values inside indicate on a topographic map?
A summit or hill
What is the purpose of land leveling?
To modify the land surface for efficient surface irrigation
What criteria does land leveling depend on?
Soil profile conditions, land slope, and climate
What happens when contour lines coincide horizontally with a zero value?
It indicates a vertical cliff
What do V-shaped curves in contour lines indicate?
A ridge line
What does a series of closed contours with higher values outside indicate?
A depression
What does the line passing through a saddle and summits on contour lines show?
A watershed line
What should be divided into smaller field subdivisions based on natural topographical boundaries in the initial plan?
Entire farm
Test your knowledge about land grading, an important operation to reshape land for irrigation and drainage purposes. Learn about the techniques of cutting, filling, and smoothing to achieve a uniform grade without soil erosion.
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