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Summertime Flooding Effects on Alfalfa Mortality, Soil Oxygen Concentrations, and Matric Potential in a Silty Clay Loam Soil
Author(s) -
Meek B. D.,
Donovan T. J.,
Graham L. E.
Publication year - 1980
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/sssaj1980.03615995004400020048x
Subject(s) - loam , water potential , medicago sativa , clay soil , environmental science , soil science , soil water , flooding (psychology) , agronomy , hydrology (agriculture) , chemistry , geology , geotechnical engineering , biology , psychology , psychotherapist
Soil oxygen levels and soil water matric potentials were measured at the 15‐, 30‐, and 60‐cm depths in plots subjected to flooding times of 15, 25, 35, and 45 hours. A decrease to 6% O 2 or less in the soil for > 24 hours resulted in substantial losses of alfalfa ( Medicago sativa L.). Soil O 2 content decreased more at the 15‐cm depth as compared with the 30‐ or 60‐cm depths because of higher matric potential. The critical matric potential that restricted O 2 movement was about −11 cbars.