HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Moret, D. Articles by Arrúe, J. L. Search for Related Content PubMed Articles by Moret, D. Articles by Arrúe, J. L. Agricola Articles by Moret, D. Articles by Arrúe, J. L. Related Collections Hydraulic Conductivity Soil Methods/Instrumentation Structure and Properties

Characterizing Soil Water-Conducting Macro and Mesoporosity as Influenced by Tillage Using Tension Infiltrometry

Departamento de Suelo y Agua, Estación Experimental de Aula Dei, Consejo Superior de Investigaciones, Científicas (CSIC), PO Box 202, 50080 Zaragoza, Spain

View larger version (17K): [in this window] [in a new window]   Fig. 1. Soil hydraulic conductivity (K) vs. pressure head () relationships for conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). Bars represent the shortest significant difference (P < 0.05) for comparison among tillage treatments where significant differences were found (Duncan's test).

View larger version (19K): [in this window] [in a new window]   Fig. 2. Minimum equivalent pore radius, C0 (Eq. [3], dark points), and representative mean pore radius for two consecutive soil water tensions, , (Eq. [6], white points-) estimated under conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). Macropores are defined as those pores that drain at > –4 cm (C0 > 0.375 mm) and mesopores as those pores draining at between –4 and –14 cm (0.375 > C0 > 0.107 mm). Asterisks indicate significant difference between C0 and (P < 0.05, t-test).

View larger version (11K): [in this window] [in a new window]   Fig. 3. Maximum number of effective pores per unit area, NC0, (Eq. [7], black points) and number of effective water-transmitting pores per unit area, N, (Eq. [10], white points) for two consecutive water soil tensions measured under conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). Macropores are defined as those pores that drain at > –4 cm and mesopores as those pores draining at between –4 and –14 cm. Asterisks indicate significant difference between NC0 and N (P < 0.05, t-test).

View larger version (12K): [in this window] [in a new window]   Fig. 4. Effective porosity,C0, calculated using the minimum equivalent pore radius (C0) for a given tension range (Eq. [8], dark points) and effective porosity, , computed from the representative mean pore radius for two consecutive soil water tensions, , (Eq. [11], white points) measured under conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). Macropores are defined as those pores that drain at > –4 cm and mesopores as those pores draining at between –4 and –14 cm. Asterisks indicate significant difference between C0 and (P < 0.05, t-test).

View larger version (21K): [in this window] [in a new window]   Fig. 5. Number of effective water-transmitting pores per unit area (N) and representative mean pore radius () vs. soil hydraulic conductivity (K) under conventional tillage (CT), reduced tillage (RT), and no-tillage (NT).