Particle density

Blake, G. R.

doi:10.1007/978-1-4020-3995-9_406

Cited by 60 publications

(53 citation statements)

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“…Bulk density (rb) and particle density of soils were determined by core method (Blake and Hartge, 1986a) and pycnometer method (Blake and Hartge, 1986b), respectively. Total porosity (St) of the soil was also calculated.…”

Section: Physical Analysesmentioning

confidence: 99%

Physical, chemical and microbiological properties of an Andisol as related to land use and tillage practice

Rahman

Okubo

Sugiyama

et al. 2008

Soil and Tillage Research

135

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Section: Physical Analysesmentioning

confidence: 99%

Physical, chemical and microbiological properties of an Andisol as related to land use and tillage practice

Rahman

Okubo

Sugiyama

et al. 2008

Soil and Tillage Research

135

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“…Gravimetric moisture content, soil pH 178 (soil: H2O, 1: 2.5), particle density, BD and WFPS analyses were conducted according to standard 179 methods (Blake, 1965;Emmett et al, 2008;Ohlinger, 1995aOhlinger, , 1995b. 180 …”

mentioning

confidence: 99%

Biochar suppresses N2O emissions while maintaining N availability in a sandy loam soil

Case

McNamara

Reay

et al. 2015

Soil Biology and Biochemistry

177

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Our results show that biochar suppressed cumulative soil N2O production by 91 % in near-saturated, 23 fertilised soils. Cumulative denitrification was reduced by 37 %, which accounted for 85 -95 % of 24 soil N2O emissions. We also found that physical/chemical and biological ammonium (NH4 + ) 25 immobilisation increased with biochar amendment but that nitrate (NO3 -) immobilisation decreased. 26We concluded that this immobilisation was insignificant compared to total soil inorganic N content. In 27 contrast, soil N mineralisation significantly increased by 269 % and nitrification by 34 % in biochar-28 amended soil. 29These findings demonstrate that biochar amendment did not limit inorganic N availability to nitrifiers 30 and denitrifiers, therefore limitations in soil NH4 + and NO3 -supply cannot explain the suppression of 31 N2O emissions. These results support the concept that biochar application to soil could significantly 32 mitigate agricultural N2O emissions through altering N transformations, and underpin efforts to 33 develop climate-friendly agricultural management techniques. 34 2

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“…Soil particle density ( p ) was determined through the volumetric flask method (Blake & Hartge, 1986a) and soil bulk density ( s ) using undisturbed samples, collected in cylinders with a known volume and dried at 105 ºC until constant mass (Blake & Hartge, 1986b). Soil porosity was obtained by the equation:…”

Section: Laboratory Analysesmentioning

confidence: 99%

Soil Physical Quality Indicators and Refinement of the Evaluation Method through the Srelative

Alencar¹,

Chaves²,

Freire³

et al. 2018

JAS

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This study aimed to verify the efficiency of indicators of measure of physical attributes' alterations and to refine the S relative determination method in order to increase its sensitivity to soil physical alterations. Soils under Ficus carica L. cultivation (with 0, 20, 40 and 60% of liquid bovine biofertilizer in the irrigation depth) and under forest were used. Parameters evaluated included soil granulometry, soil bulk and particle density, soil water retention curve (SWRC), porosity and the indices S and S relative . The experimental design was completely randomized with four replicates. For S relative refinement, with the SWRC containing only textural porosity, the soil was dispersed in water and with the addition of 1 N sodium hydroxide (with and without removal of sodium through washing). An ANOVA was performed for 0, 20, 40 and 60% of biofertilizer in 0-10, 10-20 and 20-30 layers; Dunnett test was used to compare the mean values of S-index and S relative -index. With respect to four methods to obtain the S relative -index the means were compared by Tukey test. Tests of line parallelism and intercept were performed for the regressions between each of the soil physical variables and S relative -index obtained. It was found that S and S relative indices were sensitive to soil physical alterations caused by the application of the biofertilizer; Srelative-index was sensitive to variation in soil bulk density and total porosity and the S relative -index obtained from the method of soil dispersion in water is more sensitive to soil physical alterations in comparison to S relative -index obtained through ADFE.

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Particle density

Cited by 60 publications

References 0 publications

Physical, chemical and microbiological properties of an Andisol as related to land use and tillage practice

Physical, chemical and microbiological properties of an Andisol as related to land use and tillage practice

Biochar suppresses N2O emissions while maintaining N availability in a sandy loam soil

Soil Physical Quality Indicators and Refinement of the Evaluation Method through the Srelative

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