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The drainage of irrigated farms

Author: R A Hart
Publisher: Washington, D.C. : U.S. Department of Agriculture, 1917.
Series: Farmers' bulletin (United States. Department of Agriculture), no. 805.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Many acres of irrigated land have become water-logged. These must be drained before they can be brought back into use. Much irrigated land contains an excess of alkali salts, and underdrainage is the basis of the process for their removal. Water which percolates deep into the soil following irrigation often raises the water table to the height of the plant roots, where it may remain to the detriment of plant growth.  Read more...
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Details

Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: R A Hart
OCLC Number: 15220000
Notes: Cover title.
"Contribution from the Office of Public Roads and Rural Engineering."
Description: 31 pages : illustrations ; 23 cm.
Contents: Need of drainage on irrigated lands --
Beneficial results of draining irrigated lands --
Practical drainage requirements --
Required depth of drains --
Spacing and location of drains --
Types of drains --
Size of drains --
Construction methods --
Devices --
Costs --
Alkali reclamation --
Maintenance --
Necessity and advantages of cooperation --
Conclusions.
Series Title: Farmers' bulletin (United States. Department of Agriculture), no. 805.
Responsibility: R.A. Hart.

Abstract:

Many acres of irrigated land have become water-logged. These must be drained before they can be brought back into use. Much irrigated land contains an excess of alkali salts, and underdrainage is the basis of the process for their removal. Water which percolates deep into the soil following irrigation often raises the water table to the height of the plant roots, where it may remain to the detriment of plant growth. Underdrainage will remove this useless water. If in sufficient quantities, water so removed may be used again in irrigation. Seepage or storm water form adjacent tracts or water released in the soil by spring thaws, may escape either through surface drains or through underdrains. Underdrainage prevents the heaving of soil by frost and permits its ventilation. It makes possible a warmer soil, permits deeper cultivation, and by allowing the plants to develop a deeper and more complex rooting system, actually increases the available moisture in the soil, instead of decreasing it; by the same means it increases the available plant food. Methods of draining irrigated farms are described in this bulletin."--Page 2.

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