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Effects of Soil Types and Tillage Systems on Soil Water Movement in the Root Zone of Cornfields  

Kim, Won-Il (National Institute of Agricultural Science and Technology)
Jeong, Goo-Bok (National Institute of Agricultural Science and Technology)
Koh, Mun-Hwan (National Institute of Agricultural Science and Technology)
Huck, M.G. (Department of Natural Resources and Environmental Sciences, University of Illinois)
Park, Ro-Dong (Department of Agricultural Chemistry, Chonnam National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.35, no.4, 2002 , pp. 197-206 More about this Journal
Abstract
Volumetric soil water contents through a soil profile were monitored to identify the effects of tillage systems and soil physico-chemical characteristic on soil water movement from the soil profile. Water content profiles under no tillage (NT) and conventional tillage (CT) practices were compared at two commercial farms in central Illinois from 1992 through 1994, using neutron-scattering techniques in weekly intervals during each growing season. The volumetric water content of surface soil layers was affected more by tillage systems and rainfall amounts, whereas that of the subsoil layers was more strongly affected by soil types. Soil water percolated faster through Saybrook and Catlin soils than through Drummer, Flanagan, and Ipava soils because Saybrook and Catlin soils have lower clay content and water-retention capacity and higher permeability than Drummer, Flanagan, and Ipava soils. Increased soil organic matter (SOM) in Drummer, Flanagan, and Ipava soils would be attributable to the higher soil water retention than other soil types. Soil water contents in the corn root zone were consistently higher under CT plots than under NT plots.
Keywords
Volumetric soil water content; Neutron-scattering technique; Soil types; Tillage systems;
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