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Soil Structure and Hydraulic Conductivity of Adjacent Virgin and Cultivated Pedons at two Sites: A Typic Argiudoll (silt loam) and a Typic Eutrochrept (clay)
Author(s) -
Bouma J.,
Hole F. D.
Publication year - 1971
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/sssaj1971.03615995003500020039x
Subject(s) - loam , mollisol , silt , hydraulic conductivity , soil science , macropore , bulk density , organic matter , agronomy , entisol , soil series , soil morphology , soil water , environmental science , geology , soil organic matter , soil classification , chemistry , geomorphology , biology , mesoporous material , biochemistry , organic chemistry , catalysis
Soil morphology and hydraulic conductivity ( K ) of principal soil horizons of paired virgin and cultivated soil pedons were studied at two sites: a Tama silt loam (Typic Argiudoll) and an Oshkosh clay (Typic Eutrochrept). About a century of cultivation had led to reduction of K (measured by the Bouwer double‐tube method) in the upper part of the solum below the Ap. Corresponding changes in soil morphology are noted. The reductions in K are paralleled by increases in bulk density and decreases in porosity and organic matter content in the soil horizons. At a depth of 80 to 90 cm in the clay soil, K increased apparently as a result of formation of interpedal voids as the alfalfa crop ( Medicago sativa L.) extracted moisture.