OBSERVATIONS ON SOME ROUTINE METHODS FOR SOIL pH DETERMINATION

Conyers, Mark; Davey, B. G.

doi:10.1097/00010694-198801000-00004

Cited by 87 publications

(40 citation statements)

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“…With reference to Figure 4, substituting a constant 10.0000 g into Equation [4], in place of the mass figures actually obtained, had hardly any effect on precision. However, gross errors in scooping would certainly influence the lime requirement.…”

Section: Repeatability and Hysteresis Studiesmentioning

confidence: 88%

“…The plow depth is usually taken to be 8 inches (20 cm). Table 1 is a compilation of lime requirement values, and one can test the accuracy of Equation [4] by substituting the pHsMP data from the table (together with a 5 g sample size), and comparing the values obtained to those given in the second column. Since pure CaCO3 is unlikely to be used by the average farmer, the other columns in the table make adjustments for agricultural grade limestone (25).…”

Section: Downloaded By [] At 21:49 14 June 2016mentioning

confidence: 99%

“…Although we could incorporate the Equation [4] into our EasyLab program, we manipulate the data in a computer spreadsheet (Excel) program.…”

Section: Calculations Based Upon Smp Buffer Ph Determinationsmentioning

confidence: 99%

“…In the laboratory, this is usually performed by mixing the soil with deionized water in a 1:1 or 1:2 (v/v) ratio. Often, 0.01M calcium chloride solution is found useful in providing a constant ionic strength for a range of soils, irrespective of their history or mineralogical content (3,4). Not only is soil classified as acidic, neutral or basic, but for acidic soils, calculations can be performed to determine the amount of lime (calcium carbonate or its equivalent) that needs to be added to a given depth of soil in order to raise the pH to a satisfactory level for growing a specific crop.…”

Section: Introductionmentioning

confidence: 99%

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A robotic procedure for the determination of soil lime requirement

Joyce

Langan

Quigley

et al. 1995

Communications in Soil Science and Plant Analysis

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Section: Repeatability and Hysteresis Studiesmentioning

confidence: 88%

Section: Downloaded By [] At 21:49 14 June 2016mentioning

confidence: 99%

“…Although we could incorporate the Equation [4] into our EasyLab program, we manipulate the data in a computer spreadsheet (Excel) program.…”

Section: Calculations Based Upon Smp Buffer Ph Determinationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A robotic procedure for the determination of soil lime requirement

Joyce

Langan

Quigley

et al. 1995

Communications in Soil Science and Plant Analysis

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“…Occasionally, a soil's history or mineralogical content is unknown, and in such cases, soil and 0.1M calcium chloride (CaCh) solution can be mixed together to provide a constant ionic strength; values are quoted as pHca (3,4). In knowing the pH of a soil, an immediate decision can be made as to whether lime need be added to it.…”

Section: Quigley and Reidmentioning

confidence: 99%

Comparison of a combination pH electrode and field effect transistor electrode for the determination of soil pH and lime requirement

Quigley

Reid

1995

Communications in Soil Science and Plant Analysis

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A commercial laboratory robot has been used to compare the responses of two different types of electrode for the determination of soil in water pH (pH w ), and soil in SMP buffer solution pH (pH SMP ). The latter is integral to a popular method for the determination of soil lime requirement. A combination pH electrode is compared with a solid state, ion selective field effect transistor electrode. Response times and hysteresis effects are discussed.

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Heavy metal phytoremediation of a poplar clone in a contaminated soil in southern Italy

Ancona

Caracciolo

Campanale

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The Monviso clone previously tested successfully to remediate a lindane‐contaminated soil in central Italy was then applied in a historically heavy metal contaminated area in southern Italy. RESULTS The results obtained at 900 days from the poplar planting showed a strong decrease below Italian national legal limits (D.Lgs 152/06) for most heavy metals (HMs). The highest reduction of HM concentrations was observed in soil samples collected near the trunk (25 cm distant from poplar) and in the rhizosphere. The values of the HM bioaccumulation factor (BAF, considering roots and leaves) and of the translocation factor (TF) suggest that poplar trees were able to phytostabilize HMs. The soil organic carbon content increased compared to the previous sampling in all plots planted. The highest values were observed for the rhizosphere soils of each target tree, while the phosphorous available strongly decreased. Microbial results showed an overall increase in cell viability, dehydrogenase activity and microbial abundance of some bacterial groups. CONCLUSION Overall results showed that the poplar‐based phytoremediation strategy was able to promote the phytostabilization of the HMs and to improve the soil quality in terms of both organic carbon content and microbial community structure and activity. © 2019 Society of Chemical Industry

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OBSERVATIONS ON SOME ROUTINE METHODS FOR SOIL pH DETERMINATION

Cited by 87 publications

References 0 publications

A robotic procedure for the determination of soil lime requirement

A robotic procedure for the determination of soil lime requirement

Comparison of a combination pH electrode and field effect transistor electrode for the determination of soil pH and lime requirement

Heavy metal phytoremediation of a poplar clone in a contaminated soil in southern Italy

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