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Soil water dynamics related to the degree of compaction of two brazilian oxisols under no-tillage 90
Silva,Vanderlei Rodrigues da; Reichert,José Miguel; Reinert,Dalvan José; Bortoluzzi,Edson Campanhola.
Soil water properties are related to crop growth and environmental aspects and are influenced by the degree of soil compaction. The objective of this study was to determine the water infiltration and hydraulic conductivity of saturated soil under field conditions in terms of the compaction degree of two Oxisols under a no-tillage (NT). Two commercial fields were studied in the state of Rio Grande do Sul, Brazil: one a Haplortox after 14 years under NT; the other a Hapludox after seven years under NT. Maps (50 x 30 m) of the levels of mechanical penetration resistance (PR) were drawn based on the kriging method, differentiating three compaction degrees (CD): high, intermediate and low. In each CD area, the infiltration rate (initial and steady-state) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water infiltration; Mechanical penetration resistance; Kriging; Porosity.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500003
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