Soil aeration and relationship to inorganic nitrogen during aerobic cultivation of irrigated rice on a consolidated land parcel

•Soil aeration varied across a consolidated land parcel during growth of aerobic rice.•Water-filled pore space (WFPS) was inversely related to soil sand content.•Nitrate was inversely related to WFPS and directly related to sand content.•Nitrate-N accumulated and exceeded ammonium-N at 90 % WFPS, pr...

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Bibliographic Details
Published in:Soil & tillage research 2020-08, Vol.202, p.104647, Article 104647
Main Authors: Girsang, Setia S., Correa, Teodoro Q., Quilty, James R., Sanchez, Pearl B., Buresh, Roland J.
Format: Article
Language:English
Subjects:
Aerobic rice
Nitrate
Spatial variability
Water-Filled pore space
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Summary:•Soil aeration varied across a consolidated land parcel during growth of aerobic rice.•Water-filled pore space (WFPS) was inversely related to soil sand content.•Nitrate was inversely related to WFPS and directly related to sand content.•Nitrate-N accumulated and exceeded ammonium-N at 90 % WFPS, presumably due to N loss by denitrification. Precise irrigation of aerobic rice did not prevent spatial variability in soil aeration and nitrate, which was associated with inherent soil properties such as sand content.
ISSN:0167-1987
1879-3444
DOI:10.1016/j.still.2020.104647