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- catalog 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.".
- catalog contributor b7331435.
- catalog created "1917.".
- catalog date "1917".
- catalog date "1917.".
- catalog dateCopyrighted "1917.".
- catalog description "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.".
- catalog description "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.".
- catalog extent "31 p. :".
- catalog isPartOf "Farmers' bulletin (United States. Department of Agriculture) ; no. 805.".
- catalog isPartOf "Farmers' bulletin / United States Department of Agriculture ; no. 805".
- catalog issued "1917".
- catalog issued "1917.".
- catalog language "eng".
- catalog publisher "Washington, D.C. : U.S. Dept. of Agriculture,".
- catalog subject "Drainage.".
- catalog subject "Irrigation.".
- catalog subject "S21 .A6".
- catalog tableOfContents "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.".
- catalog title "The drainage of irrigated farms / R.A. Hart.".
- catalog type "text".