Soil water retention as affected by tillage and residue management in semiarid Spain

Abstract Conservation tillage preserves soil water and this has been the main reason for its rapid dissemination in rainfed agriculture in semiarid climates. We determined the effects of conservation versus conventional tillage on available soil water capacity (AWC) and related properties at the end of 5 years of management on a clay loam calcic soil ( Calcic Haploxerept ) in semiarid northern Spain. No-tillage with (NTSB) and without stubble burning (NT), reduced chisel-plough tillage (RT) and conventional tillage with mouldboard plough (MT) were compared in rainfed barley monoculture. Bulk density ( ρ b ), organic matter content (OM), soil water retention (SWR) at matric potentials of 0 to −1500 kPa, and soil water content (SWC) were determined in the driest year of the 5-year study period. Soil OM in the upper 0.15 m was significantly higher (13%) under NTSB, NT and RT than under MT. Soil ρ b in the upper 0.15 m under NT and NTSB was greater than under RT and MT, but at a depth of 0.15–0.30 m was greater under RT than under the other treatments. Reorganisation of pore sizes due to tillage treatments affected AWC. Under RT and MT the largest percentage of the total soil porosity was occupied by pores >9 μm (equivalent pore diameter), in accordance with lower ρ b . Available water capacity was greater with NT than with RT and MT. Higher SWC under conservation tillage systems (NT, NTSB and RT) than under MT was attributed mainly to greater AWC and to the mulching effect of crop residues. Crop yield in the driest year of the 5-year period was lowest under MT whereas no differences among treatments were found over the 5-year period. Stubble burning did not affect AWC nor barley yield. Tillage had a greater impact on soil properties and on crop yield than crop residue management.

[1]  R. L. Blevins,et al.  Long-Term No-tillage Effects on Soil Properties and Continuous Corn Yields , 1994 .

[2]  Ramesh P. Rudra,et al.  Tillage and heterogeneity effects on the performance of soil water characteristic models , 1998 .

[3]  M. R. Carter,et al.  Soil Sampling and Methods of Analysis , 1993 .

[4]  A. Page.  Methods of soil analysis. Part 2. Chemical and microbiological properties. , 1982 .

[5]  R. Lal.  Tillage and agricultural sustainability , 1991 .

[6]  Teamrat A. Ghezzehei,et al.  Modeling the dynamics of the soil pore-size distribution , 2002 .

[7]  J. L. Hernanz,et al.  Long-term effects of tillage systems and rotations on soil structural stability and organic carbon stratification in semiarid central Spain , 2002 .

[8]  M. R. Carter.  Strategies to overcome impediments to adoption of conservation tillage. , 1994 .

[9]  A. Klute.  Methods of soil analysis. Part 1. Physical and mineralogical methods. , 1988 .

[10]  W. Edwards,et al.  Conservation tillage and macropore factors that affect water movement and the fate of chemicals , 2000 .

[11]  L. López-Bellido,et al.  Effects of Tillage, Crop Rotation, and Nitrogen Fertilization on Wheat under Rainfed Mediterranean Conditions , 2000 .

[12]  R. E. Phillips,et al.  No-Tillage Agriculture: Principles and Practices , 1984 .

[13]  J. L. Arrúe,et al.  A comparison between seasonal changes in soil water storage and penetration resistance under conventional and conservation tillage systems in Aragón , 1996 .

[14]  Robert L. Blevins,et al.  No-Tillage Agriculture , 1980, Science.

[15]  R. Miller,et al.  Chemical and microbiological properties , 1982 .

[16]  F. Tebrügge,et al.  Farmers’ and Experts’ Opinion on No-Tillage in Western Europe and Nebraska (USA) , 2003 .

[17]  A. A. Mahboubi,et al.  Twenty-eight years of tillage effects on two soils in Ohio , 1993 .

[18]  J. Ripmeester,et al.  Effects of till vs no-till on the quality of soil organic matter , 1990 .

[19]  R. L. Blevins,et al.  Tillage and Cover Crop Management for Soil Water Conservation , 1990 .

[20]  C. W. Thornthwaite.  An Approach Toward a Rational Classification of Climate , 1948 .

[21]  O. R. Jones,et al.  Residue management and tillage effects on soil-water storage and grain yield of dryland wheat and sorghum for a clay loam in Texas , 2002 .

[22]  R. Horton,et al.  Tillage Effects on Soil Water Retention and Pore Size Distribution of Two Mollisols1 , 1985 .

[23]  C. Norwood.  Profile Water Distribution and Grain Yield as Affected by Cropping System and Tillage , 1994 .

[24]  M. R. Carter,et al.  Impact of crop management factors in conservation tillage farming on earthworm density, age structure and species abundance in south-eastern Australia , 1999 .

[25]  L. Ahuja,et al.  Changes in Soil Water Retention Curves Due to Tillage and Natural Reconsolidation , 1998 .

[26]  R. Hill.  Long-term conventional and no-tillage effects on selected soil physical properties. , 1990 .

[27]  C. Dirksen.  Soil physics measurements , 1999 .

[28]  R. Dalal.  Long‐Term Effects of No‐Tillage, Crop Residue, and Nitrogen Application on Properties of a Vertisol , 1989 .

[29]  C. C. Lamarca,et al.  Stubble Over the Soil: The Vital Role of Plant Residue in Soil Management to Improve Soil Quality , 1996 .

[30]  F. Moreno,et al.  The influence of tillage methods on soil physical properties and water balance for a typical crop rotation in SW Spain , 1990 .

[31]  J. Lampurlanés,et al.  Tillage effects on water storage during fallow, and on barley root growth and yield in two contrasting soils of the semi-arid Segarra region in Spain , 2002 .

[32]  A. Klute,et al.  Physical and mineralogical methods , 1986 .

[33]  J. Lampurlanés,et al.  Root growth, soil water content and yield of barley under different tillage systems on two soils in semiarid conditions , 2001 .

[34]  Van Genuchten,et al.  A closed-form equation for predicting the hydraulic conductivity of unsaturated soils , 1980 .

[35]  B. Radford,et al.  Conservation tillage increases in soil water storage, soil animal populations, grain yield, and response to fertiliser in the semi-arid subtropics , 1995 .

[36]  Berman D. Hudson,et al.  Soil organic matter and available water capacity , 1994 .

[37]  F. Tebrügge.  No-Tillage Visions- Protection of Soil, Water and Climate and Influence on Management and Farm Income , 2003 .