Hot water percolation (HWP): A new rapid soil extraction method

Füleky, György; Czinkota, Imre

doi:10.1007/bf02390235

Cited by 33 publications

(9 citation statements)

References 3 publications

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“…P-CaCl 2 results from an extraction with a weak CaCl 2 solution to imitate the salt condition of soil water (Eriksson et al, 2013) and estimates the soil solution P concentration (Hesketh and Brookes, 2000) or the easily soluble P fraction (Djojic and Mattsson, 2013). The hot water extraction method, which is used to estimate the easily available organic C (HWC) (Ghani et al, 2003) and N pool (Keeney and Bremner, 1966), can also be used to determine the easily available organic P pool (HWP), since the high temperatures lead to decomposition of organic compounds (Füleky and Czinkota, 1993). More P was extracted with HWP, and HWP turned out to have a lower variability than P-CaCl 2 .…”

Section: P Availability In the Soilmentioning

confidence: 99%

Effect of organic and mineral fertilizers on soil P and C levels, crop yield and P leaching in a long term trial on a silt loam soil

Nest¹,

Vandecasteele²,

Ruysschaert³

et al. 2014

Agriculture, Ecosystems & Environment

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Section: P Availability In the Soilmentioning

confidence: 99%

Effect of organic and mineral fertilizers on soil P and C levels, crop yield and P leaching in a long term trial on a silt loam soil

Nest¹,

Vandecasteele²,

Ruysschaert³

et al. 2014

Agriculture, Ecosystems & Environment

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“…It should be noted, however, that despite these tendencies, the quality of the raw compost materials also influences the values of these parameters. The simple HWP method (Füleky and Czinkota, 1993) can thus be recommended for a rapid, routine determination of compost maturity.…”

Section: Discussionmentioning

confidence: 99%

“…Hot water percolation (HWP) is a new and easily applicable soil extraction method (Füleky and Czinkota 1993) which was adapted for compost analysis . In the course of hot water extraction, 5 g dry, ground compost was placed in the sample holder, after then boiling water was poured onto the compost and the resulting solution was collected as five 100 cm³ samples.…”

Section: Compost Analysismentioning

confidence: 99%

Determination of compost maturity using the Hot Water Percolation (HWP) method

2017

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Maturity is one of the parameters that needs to be examined when producing composts. The present paper aims to evaluate whether the Hot Water Percolation (HWP) method elaborated for soil analysis can be used to determine the maturity of composts. The methods involves percolating boiling water through dry, ground compost samples, followed by the measurement of the dissolved carbon and mineral nitrogen contents and the spectral properties of the solution. Two groups of compost samples were examined. In one group the above parameters were recorded throughout the 42-day maturing process, while in the other group these parameters were measured on 7 samples judged to be mature and 5 judged to be fresh. The HWP-soluble NH 4 -N/NO 3 -N ratio was less than 0.16 in mature composts; for both compost groups the HWP-C value was less than 100 mg L -1 , absorbance at 254 nm was 1.0-2.0 cm -1 , the E4/E6 ratio was generally less than 2.0 and the SUVA (specific UV absorption) value at least 1.4 but generally higher, depending on the initial materials. The extracts obtained using the HWP method provide a good demonstration of the maturity stages in the composting process in spite of the speed of extraction.

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“…In the original soil samples pH KCl , and CaCO 3 content, ammonium lactate -acetate soluble phosphate (AL-P) (THAMM et al, 1968) content were determined in addition to the Chang-Jackson phosphate fractions (FÜLEKY & VARGA, 1974). The hot water extractable phosphate content (HWP-P) of soils was determined with a new method developed in our laboratory (FÜLEKY & CZINKOTA, 1993). For the kinetic approach of soil phosphorus supply 100 cm³ solutions were collected five times.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus Supply of Typical Hungarian Soils

Füleky¹

2006

Agrokémia És Talajtan

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The new hot water percolation (HWP) method was introduced to determine the phosphorus supply of soils from the Soil Bank of 36 Hungarian soils. The present work aimed to explain the availability of phosphorus by determining the inorganic phosphate fractions and using ryegrass test plants. Four inorganic phosphate fractions were distinguished: Fraction I, the sorbed phosphates; Fraction II, the easily soluble Ca phosphates and the Al bound phosphates; Fraction III, the Fe phosphates; and Fraction IV, the hardly soluble Ca phosphates. Fraction II, in which the easily soluble Ca phosphates and Al phosphates accumulate, was the main phosphorus source for the test plants on both calcareous and non-calcareous soils. Fraction III (the iron phosphates) plays a greater role in non-calcareous soils, while Fraction IV (the hardly soluble Ca phosphates) in calcareous soils. Both fractions are closely connected with soil development, and with soil properties such as pH and CaCO 3 content. The hot water percolation method reflects the phosphorus supply of soil as well as that measured with ryegrass plants and with the AL method. This new HWP method is in good correlation with the main source of phosphate, with fraction II. For routine purposes the first collected HWP fraction can possibly be used to determine the phosphorus supply of soil correlating well with the phosphorus uptake of test plants.

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Hot water percolation (HWP): A new rapid soil extraction method

Cited by 33 publications

References 3 publications

Effect of organic and mineral fertilizers on soil P and C levels, crop yield and P leaching in a long term trial on a silt loam soil

Effect of organic and mineral fertilizers on soil P and C levels, crop yield and P leaching in a long term trial on a silt loam soil

Determination of compost maturity using the Hot Water Percolation (HWP) method

Phosphorus Supply of Typical Hungarian Soils

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