Structural and hydrological changes in a Vertisol under different fallow management techniques

Thorburn, PJ

doi:10.1016/0167-1987(92)90080-u

Cited by 9 publications

(4 citation statements)

References 22 publications

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“…3a). Various papers have addressed the combined effects of tillage and residue management (Benoit and Lindstrom, 1987;Zachmann et al, 1987;McFarland et al, 1990;Thorburn, 1992;Dao, 1993;Logsdon et al, 1993;Karlen et al, 1994;Lal et al, 1994;Rawitz et al, 1994;Singh et al, 1994;Linden, 1994, 1998;Sembiring et al, 1995;Peterson et al, 1996;Sharratt, 1996;Unger et al, 1997;Baumhardt and Jones, 2002), and we highlight some important studies below.…”

Section: Residue Management Affected By Tillage Practicesmentioning

confidence: 99%

Tillage effects on soil hydraulic properties in space and time: State of the science

Strudley¹,

Green²,

Ascough³

2008

Soil and Tillage Research

629

421

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Section: Residue Management Affected By Tillage Practicesmentioning

confidence: 99%

Tillage effects on soil hydraulic properties in space and time: State of the science

Strudley¹,

Green²,

Ascough³

2008

Soil and Tillage Research

629

421

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“…However, conservation tillage practices, and no-tillage in particular, do not always result in favourable soil conditions. Increased soil strength and decreased porosity and water infiltration have been observed by several authors under continuous no-tillage (Hill, 1990;Thorburn, 1992;Vyn and Raimbault, 1993). These contrasting responses to conservation tillage suggest the need for local evaluation.…”

Section: Introductionmentioning

confidence: 96%

A comparison between seasonal changes in soil water storage and penetration resistance under conventional and conservation tillage systems in Aragón

López

Arrúe

Sánchez-Girón

1996

Soil and Tillage Research

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1 Low and extremely variable precipitations limit dryland crop production in the semi-arid areas of 2 Aragón (NE Spain). These areas are also affected by high annual rates of topsoil losses by both wind 3 and water erosion. A long-term experiment to determine the feasibility of conservation tillage in the 4 main winter barley production areas of Aragón was initiated in 1989 at four locations, three on loam to 5 silt loam soils (Xerollic Calciorthid) and one on a silty clay loam (Fluventic Ustochrept), receiving 6 between 300 and 600 mm of average annual rainfall. In this study, we compared, under both continuous 7 cropping and cereal-fallow rotation, the effects of conventional tillage (moldboard plow) and two 8 conservation tillage systems, reduced tillage (chisel plow) and no-tillage, on soil water content and 9 penetration resistance during the first two growing seasons. Whereas reduced and conventionally tilled 10 treatments generally had similar soil water contents during the experimental period, the effects of no-11 tillage were inconsistent. No-tilled plots had from 26% less to 17% more stored soil water (0-80 cm) 12 than conventional tilled ones at the beginning of the growing season. In contrast to the conventional and 13 reduced tillage treatments, penetration resistances were between 2 and 4 MPa after sowing in most of 14 the plow layer (0-40 cm) under no-tillage at all sites. Fallow efficiencies in moisture storage in the 15 cereal-fallow rotation, when compared with the continuous cropping system, ranged from -8.7 to 12%. 16The highest efficiencies were recorded when the rainfall in the months close to primary tillage exceeded 17 100 mm. Since this event is very unlikely, long fallowing (9-10 months) appears to be an inefficient 18 practice for water conservation under both conventional and conservation management. Our results 19suggest that, up to now, only reduced tillage could replace conventional tillage without adverse effects 20 on soil water content and penetration resistance in the dryland cereal-growing areas of Aragón.

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“…, 1985; Bowen et al. , 1988; Thorburn, 1992). More recently, pastoral fallowing or deferred grazing, which involves no defoliation of pastures for a period generally from spring to autumn, was practised and studied in New Zealand in an attempt to improve the productivity, persistence and management of hill pastures (Mackay et al.…”

Section: Introductionmentioning

confidence: 99%

Impact of deferred grazing and fertilizer on plant population density, ground cover and soil moisture of native pastures in steep hill country of southern Australia

Nie¹,

Zollinger²

2011

Grass and Forage Science

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The impact of deferred grazing (no defoliation of pastures for a period generally from spring to autumn) and fertilizer application on plant population density, ground cover and soil moisture in a hill pasture (annual grass dominated, with Australian native grasses being the major perennial species) were studied in a largescale field experiment from 2002 to 2006 in southern Australia. Three deferred grazing strategies were used: short-term deferred grazing (no defoliation between October and January each year), long-term deferred grazing (no defoliation from October to the autumn break, that is the first significant rainfall event of the winter growing season) and optimized deferred grazing (withholding time from grazing depends on morphological development of the plants). These treatments were applied with two fertilizer levels (nil fertilizer and 50 kg P ha )1 plus lime) and two additional treatments [continuous grazing (control) and no grazing for year 1]. Deferred grazing increased (P < 0AE05) perennial grass tiller density compared with the control. On average, the tiller density of the three deferred grazing treatments was 27-88% higher than the control. There was a negative (P < 0AE01) relationship between perennial and annual grass tiller density. Fertilizer application increased (P < 0AE05) legume plant density. The densities of annual grasses, legumes, onion grass (Romulea rosea) and broadleaf weeds varied between years, but perennial grass density and moss cover did not. The ground cover of the deferred grazing treatments in autumn was on average 27% higher than the control. Soil moisture differed between treatments at 15-30 cm depth, but not at 0-15 depth over autumn and winter. The results imply that deferred grazing can be an effective tool for rejuvenating degraded native pastures through increases in native grass tiller density and population and through improving farm productivity and sustainability.

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Structural and hydrological changes in a Vertisol under different fallow management techniques

Cited by 9 publications

References 22 publications

Tillage effects on soil hydraulic properties in space and time: State of the science

Tillage effects on soil hydraulic properties in space and time: State of the science

A comparison between seasonal changes in soil water storage and penetration resistance under conventional and conservation tillage systems in Aragón

Impact of deferred grazing and fertilizer on plant population density, ground cover and soil moisture of native pastures in steep hill country of southern Australia

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