Sequestration of carbon and changes in soil quality under conservation tillage on light-textured soils in Australia: a review

Chan, K. Y.; Heenan, DP; So, H. B.

doi:10.1071/ea02077

Cited by 135 publications

(66 citation statements)

References 30 publications

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“…Soil aggregate stability is widely regarded as one of the quality indicators in the soil system (Saygın et al, 2015). The decline in soil structure is increasingly seen as a form of soil degradation (Chan et al, 2003) and is often related to land use and soil-crop management practices. Structural and physical soil degradation is often associated with a decline in the organic matter content.…”

Section: Introductionmentioning

confidence: 99%

Influence of humic acid applications on modulus of rupture, aggregate stability, electrical conductivity, carbon and nitrogen content of a crusting problem soil

Gümüş¹,

Şeker²

2015

Solid Earth

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Abstract. Soil structure is often said to be the key to soil productivity since a fertile soil, with desirable soil structure and adequate moisture supply, constitutes a productive soil. Soil structure influences soil water movement and retention, erosion, crusting, nutrient recycling, root penetration and crop yield. The objective of this work is to study humic acid (HA) application on some physical and chemical properties in weakly structured soils. The approach involved establishing a plot experiment in laboratory conditions. Different rates of HA (control, 0.5, 1, 2 and 4 %) were applied to soil during three incubation periods (21, 42 and 62 days). At the end of the each incubation period, the changes in physicochemical properties were measured. Generally, HA addition increased electrical conductivity values during all incubation periods. HA applications decreased soil modulus of rupture. Application of HA at the rate of 4 % significantly increased soil organic carbon contents. HA applications at the rate of 4 % significantly increased both mean soil total nitrogen content and aggregate stability after three incubation periods (p < 0.05). Therefore, HA has the potential to improve the structure of soil in the short term.

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Section: Introductionmentioning

confidence: 99%

Influence of humic acid applications on modulus of rupture, aggregate stability, electrical conductivity, carbon and nitrogen content of a crusting problem soil

Gümüş¹,

Şeker²

2015

Solid Earth

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“…Australian dryland farming systems where minimum tillage and stubble retention have been practiced for many years, the increase in C storage is often small (Chan et al, 2003). This is particularly so for sandy textured soils where the turnover of soil organic C is more rapid than soils with higher clay content (Hoyle et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Biochar and Compost Increase Crop Yields but the Effect is Short Term on Sandplain Soils of Western Australia

Hall¹,

Bell

2015

Pedosphere

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(Received , 201; revised , 201) ABSTRACT Sandplain soils on the south coast of Western Australia have low inherent fertility, which is mainly due to poor nutrient retention caused by insufficient clay and organic colloidal material. Previous research has shown the benefits in nutrient levels and retention from adding clay to sandplain soils; however, there is almost no information on the addition of organic amendments. A field experiment was established at the Esperance Downs Research Station, \\Testern Australian, in March 2010, to assess the effects of wheat straw (WS) and chicken manure (C:tvi) biochars and compost with and without phosphorus (P) addition on soil properties and crop production over i five growing seasons. The five seasons alternated between winter and summer crops. The~· and compost treatments significantly G'H :> W S\ increased crop yields and P uptake in 3, 2 and 1 of the five seasons, respectively. The yield increases (P < 0.05) were no more than 8%. By the end of the third season, no differences in crop yields were found that could be attributed to the organic amendments. The addition of P increased crop yields in each winter cropping season. Phosphorus addition explained more than 30% of the variation in crop yields. Despite marginal P levels and summer drought conditions, arbuscular mycorrhizal root colonisation was not affected by the organic amendments. There were no significant interactions between the organic amendments and P addition in terms of crop yields, P uptake or P uptake efficiency. Vl/e conclude that much of the effect of the organic amendments was due to direct nutrient addition which dissipated over time.

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“…The decline in soil structure, considered as a form of soil degradation (Chan et al, 2003), is often related to non appropriate land use and soil/crop management practices.…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Indicators as Affected by a Long Term Barley-Maize and Maize Cropping Systems

Manachini¹,

Corsini²,

Bocchi³

2009

Ital J Agronomy

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Most soil studies aim a better characterization of the system through indicators. In the present study nematofauna and soil structure were chosen as indicators to be assess soil health as related to agricultural practices. The field research was carried out on the two fodder cropping systems continuous maize (CM, Zea mays L.) and a 3-year rotation of silage-maize -silage-barley (Hordeum vulgare L.) with Italian ryegrass (R3) and grain-maize maintained in these conditions for 18 years. Each crop system was submitted to two management options: 1) the high input level (H), done as a conventional tillage, 2) the low input level (L), where the tillage was replaced by harrowing and the manure was reduced by 30%. The effects of the two different cropping systems was assessed on soil nematofauna and soil physic parameters (structure or aggregate stability). Comparison was made of general composition, trophic structure and biodiversity of the nematofauna collected in both systems. Differences in nematode genera composition and distribution between the two systems were also recorded. The monoculture, compared to the three year rotation, had a negative influence on the nematofauna composition and its ecological succession. The Structural Stability Index (SSI) values indicate that both the cropping systems had a negative effect on the aggregate stability. The results indicate that nematofauna can be used to assess the effects of cropping systems on soil ecosystem, and therefore be considered a good indicator of soil health to integrate information from different chemical or physical indicators.

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Sequestration of carbon and changes in soil quality under conservation tillage on light-textured soils in Australia: a review

Cited by 135 publications

References 30 publications

Influence of humic acid applications on modulus of rupture, aggregate stability, electrical conductivity, carbon and nitrogen content of a crusting problem soil

Influence of humic acid applications on modulus of rupture, aggregate stability, electrical conductivity, carbon and nitrogen content of a crusting problem soil

Biochar and Compost Increase Crop Yields but the Effect is Short Term on Sandplain Soils of Western Australia

Soil Quality Indicators as Affected by a Long Term Barley-Maize and Maize Cropping Systems

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