Soil management in relation to sustainable agriculture and ecosystem services

Powlson, D. S.; Gregory, P. J.; Whalley, W. R.; Quinton, John; Hopkins, D. W.; Whitmore, A. P.; Hirsch, P. R.; Goulding, Keith

doi:10.1016/j.foodpol.2010.11.025

Cited by 399 publications

(216 citation statements)

References 122 publications

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“…SOM depletion is associated with alteration of important soil properties (i.e., fertility, porosity, aeration-water dynamics, resistance to erosion and compaction, among others [16], and to the reduction of the capacity of soil to reorganize and restore its functionality after use or a stressful event [17]. Therefore, the capacity of soil to provide other expected environmental services (i.e., supports biodiversity, regulate water partition and purification, and sequester carbon), is affected [18,19]. Other soil properties important for the adequate functioning of soil as aggregate stability and penetration resistance are impacted.…”

Section: Regional Soil Resource Characteristicsmentioning

confidence: 99%

Soil Quality Impacts of Current South American Agricultural Practices

et al. 2015

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Section: Regional Soil Resource Characteristicsmentioning

confidence: 99%

Soil Quality Impacts of Current South American Agricultural Practices

et al. 2015

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“…bras., Brasília, v.50, n.10, p.967-978, out. 2015 DOI: 10.1590/S0100-204X2015001000013 use of nutrient input, in order to achieve greater efficiency and less negative environmental impacts (Powlson et al, 2011). The introduction of animals in integrated production systems modifies fluxes between soil-plant-animal compartments, through nutrient ingestion, consumption, and pasture-structure modification, before the nutrient is returned to the system (Bardgett & Wardle, 2003).…”

Section: Introductionmentioning

confidence: 99%

Carbon and nitrogen cycling in an integrated soybean-beef cattle production system under different grazing intensities

Assmann

Anghinoni

Martins

et al. 2015

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of grazing intensity on the decomposition of cover crop pasture, dung, and soybean residues, as well as the C and N release rates from these residues in a long-term integrated soybean-beef cattle system under no-tillage. The experiment was initiated in 2001, with soybean cultivated in summer and black oat + Italian ryegrass in winter. The treatments consisted of four sward heights (10, 20, 30, and 40 cm), plus an ungrazed area, as the control. In 2009-2011, residues from pasture, dung, and soybean stems and leaves were placed in nylon-mesh litter bags and allowed to decompose for up to 258 days. With increasing grazing intensity, residual dry matter of the pasture decreased and that of dung increased. Pasture and dung lignin concentrations and C release rates were lower with moderate grazing intensity. C and N release rates from soybean residues are not affected by grazing intensity. The moderate grazing intensity produces higher quality residues, both for pasture and dung. Total C and N release is influenced by the greater residual dry matter produced when pastures were either lightly grazed or ungrazed.Index terms: Avena strigosa, Glycine max, Lolium multiflorum, integrated crop-livestock, nutrient cycling, soil organic matter. Ciclagem de carbono e nitrogênio em sistema integrado de produção de soja e bovinos de corte sob diferentes intensidades de pastejoResumo -O objetivo deste trabalho foi avaliar o efeito da intensidade de pastejo na decomposição dos resíduos da pastagem utilizada como cultura de cobertura, do esterco e da soja, bem como a liberação de C e N desses resíduos, em um sistema integrado de produção de soja e bovinos de corte, em plantio direto e em longo-prazo. O experimento foi iniciado em 2001, com soja cultivada no verão e aveia-preta + azevém no inverno. Os tratamentos consistiram de quatro alturas de pasto (10, 20, 30 e 40 cm), além de uma área sem pastejo, como controle. Em 2009-2011, resíduos da pastagem, do esterco, e do caule e das folhas de soja foram alocados em sacos de decomposição feitos com malha de nylon e decompostos até 258 dias. Com o aumento da intensidade de pastejo, a matéria seca residual da pastagem diminuiu e a do esterco aumentou. A concentração de lignina e as taxas de liberação de C da pastagem e do esterco foram menores com a intensidade de pastejo moderada. A liberação de C e N do resíduo de soja não é afetada pela intensidade de pastejo. A intensidade moderada de pastejo produz resíduos de maior qualidade, tanto para a pastagem quanto para o esterco. Já a quantidade total de C e N liberada é influenciada pela maior quantidade de matéria seca residual produzida quando a pastagem foi submetida ao pastejo leve ou não foi pastejada.Termos para indexação: Avena strigosa, Glycine max, Lolium multiflorum, integração lavoura-pecuária, ciclagem de nutrientes, matéria orgânica do solo.

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“…It is well-known that organic matter plays important roles in soil especially in relation to agriculture and the environment (Powlson et al, 2011). We noticed that the differences in the bulk densities of samples of the same soils having different contents of organic matter could not be accounted for only by the volume of the organic matter involved.…”

Section: Introductionmentioning

confidence: 72%

Estimation of the density of the clay-organic complex in soil

Czyż¹,

Dexter²

2016

International Agrophysics

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Soil bulk density was investigated as a function of soil contents of clay and organic matter in arable agricultural soils at a range of locations. The contents of clay and organic matter were used in an algorithmic procedure to calculate the amounts of clay-organic complex in the soils. Values of soil bulk density as a function of soil organic matter content were used to estimate the amount of pore space occupied by unit amount of complex. These estimations show that the effective density of the clay-organic matter complex is very low with a mean value of 0.17 ± 0.04 g ml−1 in arable soils. This value is much smaller than the soil bulk density and smaller than any of the other components of the soil considered separately (with the exception of the gas content). This low value suggests that the clay-soil complex has an extremely porous and open structure. When the complex is considered as a separate phase in soil, it can account for the observed reduction of bulk density with increasing content of organic matter.

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Soil management in relation to sustainable agriculture and ecosystem services

Cited by 399 publications

References 122 publications

Soil Quality Impacts of Current South American Agricultural Practices

Soil Quality Impacts of Current South American Agricultural Practices

Carbon and nitrogen cycling in an integrated soybean-beef cattle production system under different grazing intensities

Estimation of the density of the clay-organic complex in soil

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