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Salinity Profiles and Leaching Fractions for Slowly Permeable Irrigated Field Soils
Author(s) -
Lonkerd W. E.,
Ehlig C. F.,
Donovan T. J.
Publication year - 1979
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1979.03615995004300020008x
Subject(s) - leaching (pedology) , soil water , agronomy , lactuca , salinity , medicago sativa , environmental science , gossypium hirsutum , soil science , biology , ecology
The salinity status of four slowly permeable irrigated soils was measured under commercial field conditions to determine the magnitude and variability of actual leaching fractions. Soil cores were taken in 30‐cm increments to a 150‐cm depth. Assuming a desirable leaching fraction of 15 to 20% for lettuce ( Lactuca sativa L.), and 5 to 10% for alfalfa ( Medicago sativa L.), cotton ( Gossypium hirsutum L.), sugarbeet ( Beta vulgaris L.), and wheat ( Triticum aestivum L. em Thell.), for nearly all soil‐crop combinations, leaching fractions ranged from insufficient to excessive. Median leaching fractions were excessive in Holtville and Indio soils planted to lettuce, sugarbeet, and wheat and insufficient or marginal in Imperial and Meloland soils planted to all crops.