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" No-tillage and high-residue practices reduce soil water evaporation "
Mitchell, Jeffrey P; Singh, Purnendu N; Wallender, Wesley W; Munk, Daniel S; Wroble, Jon F; Horwath, William R; Hogan, Philip; Roy, Robert; Hanson, Blaine R
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AL
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| Record Number
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944800
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LA4cg3g2cf
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| Language of Document
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English
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| Main Entry
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Mitchell, Jeffrey P; Singh, Purnendu N; Wallender, Wesley W; Munk, Daniel S; Wroble, Jon F; Horwath, William R; Hogan, Philip; Roy, Robert; Hanson, Blaine R
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| Title & Author
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No-tillage and high-residue practices reduce soil water evaporation [Article]\ Mitchell, Jeffrey P; Singh, Purnendu N; Wallender, Wesley W; Munk, Daniel S; Wroble, Jon F; Horwath, William R; Hogan, Philip; Roy, Robert; Hanson, Blaine R
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California Agriculture
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66/2
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| Date
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2012
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| Abstract
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Reducing tillage and maintaining crop residues on the soil surface could improve the water use efficiency of California crop production. In two field studies comparing no-tillage with standard tillage operations (following wheat silage harvest and before corn seeding), we estimated that 0.89 and 0.97 inches more water was retained in the no-tillage soil than in the tilled soil. In three field studies on residue coverage, we recorded that about 0.56, 0.58 and 0.42 inches more water was retained in residue-covered soil than in bare soil following 6 to 7 days of overhead sprinkler irrigation. Assuming a seasonal crop evapotranspiration demand of 30 inches, coupling no-tillage with practices preserving high residues could reduce summer soil evaporative losses by about 4 inches (13%). However, practical factors, including the need for different equipment and management approaches, will need to be considered before adopting these practices.
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