Natural recovery of soil physical properties from treading damage of pastoral soils in New Zealand and Australia: A review

Drewry, John

doi:10.1016/j.agee.2005.11.028

Cited by 210 publications

(198 citation statements)

References 48 publications

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“…Increased soil bulk density Pasture intensification: synergies and risks and consequent impedance to root penetration and a reduction in aeration may negatively affect legume growth, and thus nitrogen fixation in pastures (see section below). Because soil moisture is critical for soil compaction, compression of a saturated soil by squeezing out water may further lead to soil consolidation (Drewry, 2006). Grazing on wet soils should thus be avoided.…”

Section: Factors Related To Sustainability Of Intensificationmentioning

confidence: 99%

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Latawiec

Strassburg

Valentim

et al. 2014

Animal

117

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Intensification of Brazilian cattle ranching systems has attracted both national and international attention due to its direct relation with Amazon deforestation on the one hand and increasing demand of the global population for meat on the other. Since Brazilian cattle ranching is predominantly pasture-based, we particularly focus on pasture management. We summarize the most recurrent opportunities and risks associated with pasture intensification that are brought up within scientific and political dialogues, and discuss them within the Brazilian context. We argue that sustainable intensification of pasturelands in Brazil is a viable way to increase agricultural output while simultaneously sparing land for nature. Since environmental degradation is often associated with low-yield extensive systems in Brazil, it is possible to obtain higher yields, while reversing degradation, by adopting practices like rotational grazing, incorporation of legumes and integrated crop-livestock-forestry systems. Technical assistance is however essential, particularly for small-and medium-scale farmers. Sound complementary policies and good governance must accompany these measures so that a 'rebound effect' does not lead to increased deforestation and other adverse social and environmental impacts. It is also important that animal welfare is not compromised. Although the discussion is presented with respect to Brazil, some aspects are relevant to other developing countries.

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Section: Factors Related To Sustainability Of Intensificationmentioning

confidence: 99%

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Latawiec

Strassburg

Valentim

et al. 2014

Animal

117

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“…in Southland, cows are usually wintered off the milking platform. From early lactation (spring), cows are commonly rotationally grazed on pasture, at the time when soils are most prone to animal treading damage (Monaghan et al 2005;Drewry 2006). Treading damage is evident in three forms: poaching, compaction and pugging.…”

Section: Introductionmentioning

confidence: 99%

Grazing strategies to protect soil physical properties and maximise pasture yield on a Southland dairy farm

Houlbrooke¹,

Drewry²,

Monaghan³

et al. 2009

New Zealand Journal of Agricultural Research

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intensive dairy cattle grazing on wet soil can have a detrimental effect on soil physical quality and consequently on pasture production. Soil physical properties (porosity, bulk density, saturated hydraulic conductivity) of a Pallic soil (Pukemutu silt loam) and pasture production were assessed on a dairy farm in Southland, New Zealand, under a number of different cattle grazing strategies: (i) normal grazing management on undrained land, (ii) normal grazing practice on drained land, (iii) restricted autumn grazing, (iv) restricted grazing when soil conditions were wet, (v) never pugged, and (vi) never grazed. a hand-pushed cone penetrometer determined treatments (iv) and (v). Soil macroporosity was significantly greater (P < 0.05) on the never grazed plot than all other treatments at post-spring sampling each year. There were no significant differences in any soil physical properties measured on cattle grazed treatments. Spring pasture yield from the never grazed treatment was greater (P < 0.05) than the drained and undrained standard practice grazing treatments for one of the three seasons. The lack of treatment differences in soil physical properties and pasture yield from grazing treatments suggests that the never pugged grazing strategy failed to prevent soil compaction by dairy cows. To some extent this is expected as soil compaction occurs at soil water contents lower than the thresholds for pugging damage. However, the large number of grazing events when soil conditions were considered safe according to the never pugged treatment protocol, but when soil water content was greater than the plastic limit, probably contributed to both soil treading damage and compaction during the traditionally wet early spring period.

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“…In this study the macropore values, in both areas and depths, were between 13.29 and 14.31 % higher than the 10 % considered the minimum for plant growth (Drewry & Paton, 2005;Drewry et al, 2006;Reynolds et al, 2008).…”

Section: Resultsmentioning

confidence: 89%

Spatial variability of physical attributes of an alfisol under different hillslope curvatures

Camargo¹,

Júnior

Pereira

2010

Rev. Bras. Ciênc. Solo

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SUMMARYThe influence of relief forms has been studied by several authors and explains the variability in the soil attributes of a landscape. Soil physical attributes depend on relief forms, and their assessment is important in mechanized agricultural systems, such as of sugarcane. This study aimed to characterize the spatial variability in the physical soil attributes and their relationship to the hillslope curvatures in an Alfisol developed from sandstone and growing sugarcane. Grids of 100 x 100 m were delimited in a convex and a concave area. The grids had a regular spacing of 10 x 10 m, and the crossing points of this spacing determined a total of 121 georeferenced sampling points. Samples were collected to determine the physical attributes related to soil aggregates, porosity, bulk density, resistance to penetration and moisture within the 0-0.2 and 0.2-0.4 m depth. Statistical analyses, geostatistics and Student's t-tests were performed with the means of the areas. All attributes, except aggregates > 2 mm in the 0-0.2 m depth and macroporosity at both depths, showed significant differences between the hillslope curvatures. The convex area showed the highest values of the mean weighted diameter, mean geometric diameter, aggregates > 2 mm, 1-2 mm aggregates, total porosity and moisture and lower values of bulk density and resistance to penetration in both depth compared to the concave area. The number of soil attributes with greater spatial variability was higher in the concave area.Index terms: soil-landscape relationship, geostatistics, semivariogram. RESUMO: VARIABILIDADE ESPACIAL DE ATRIBUTOS FÍSICOS DE UM ARGISSOLO SOB DIFERENTES CURVATURAS DO RELEVO

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Natural recovery of soil physical properties from treading damage of pastoral soils in New Zealand and Australia: A review

Cited by 210 publications

References 48 publications

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Grazing strategies to protect soil physical properties and maximise pasture yield on a Southland dairy farm

Spatial variability of physical attributes of an alfisol under different hillslope curvatures

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