Estimation of non‐exchangeable potassium in soils using a cation‐exchange resin

Waddy, Julie A.; Vimpany, I.

doi:10.1002/jsfa.2740210301

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…5. The graphs for Te Kopuru sand and Barrhill fine sandy loam are similar in form to those given by Waddy & Vimpany (1970). Those for Waiareka clay and Ngahape silt loam are significantly different, however, in that they both show regions where many negative values for resin K were found.…”

Section: Effect Of High Levels Of Non-exchangeablesupporting

confidence: 65%

“…The significant run effect with resin K was attributed by Lee & Gibson (1974) to inadequate temperature control. Whereas the results given by Waddy & Vimpany (1970) and Lee & Gibson (1974) for resin K were reproducible within ± 5%, a number of those in Table 1 exceed this limit, particularly differences between runs.…”

Section: Methods Reproducibilitymentioning

confidence: 79%

“…It did not require constant supersimilar acid-extraction methods for the estimation VISIOn, as did the other two methods. of non-exchangeable K in soils, Waddy & In this report the resin method has been Vimpany (1970) proposed the use of a resin applied to the estimation of non-exchangeable Mg. method for determining plant-available non-Little previous work appears to have been done exchangeable K.…”

Section: In'l'roductionmentioning

confidence: 99%

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Magnesium in New Zealand Soils

Lee¹,

Gibson²

1976

New Zealand Journal of Agricultural Research

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Section: Effect Of High Levels Of Non-exchangeablesupporting

confidence: 65%

Section: Methods Reproducibilitymentioning

confidence: 79%

Section: In'l'roductionmentioning

confidence: 99%

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Magnesium in New Zealand Soils

Lee¹,

Gibson²

1976

New Zealand Journal of Agricultural Research

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“…lon exchange resins have been used with varying degrees of success in the extraction of a number of macronutrients from soil (e.g. SCHMITZ and PRATT 195 3, MacLEAN 1961, WADDY and VIMPAY 1970, SIBBESEN 1977, 1981, AURA 1978. lon exchange resins have also been used in the study of the degree of complex formation of micronutrients by, for instance, MILLER andOHLROGGE (1958 a, 1958 b).…”

Section: Determination Of Exchangeable Manganesementioning

confidence: 99%

Determination of plant-available manganese in Finnish soils

Mäntylahti

1981

AFSci

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The aim of the study was to determine the plant-available manganese in the soil and to study which factors regulate the plant-available manganese. The material consisted of 193 mineral soils and 17 organogenic soils. Oats (Avena saliva L.), Italian ryegrass (Lolium multiflorum Lam.) and turnip rape (Brassica campestris oleifera L.) were used as the test plants in the pot experiments. A cation exchange resin method was developed for extracting soil manganese. The method enabled both exchangeable and reducible manganese to be determined. Exchangeable manganese comprised the manganese which was freely present in the soil solution in cationic form, and the manganese in cationic form which could be exchanged from the soil. Reducible manganese was the manganese reducible to the oxidation state, Mn2+, by the action of hydroquinone, hydroxylammonium chloride or ascorbic acid. The content of exchangeable manganese in the soil explained 33,7 % of the variation in the manganese content of the first yield of ryegrass. The greater the number of yields harvested, the smaller was the significance of the content of exchangeable manganese in the soil as an independent variable. On the other hand, when the content of reducible manganese in the soil was used as the independent variable, then the greater the number of yields harvested, the better it explained the variation in the manganese content of the yield. The content of manganese reduced by hydroxylammonium chloride explained 68,6 % of the variation in the manganese content of the fourth yield. The contents of exchangeable manganese and manganese reducible by ascorbic acid explained 73,4 % of the variation in the manganese content of the roots. The pH, the organic carbon content and the content of hydroquinone-reducible manganese in the soil explained 67,0 % of the variation in the content of exchangeable manganese in the plough layer of the mineral soils. The content of "total" manganese in the plough layer of the mineral soils explained 27,6 % of the variation in the content of ascorbic acid-reducible manganese. The plant stands increased the content of exchangeable manganese in the soil and decreased the redox potential of the soil in comparison to the incubated soils. The content of exchangeable manganese started to increase when the redox potential of the soil fell below 0,59 V. Adding glucose promoted the reduction of manganese in the soil, reduction appearing to be both biological and non-biological in origin. Soil moisture increased the content of exchangeable manganese when the moisture was higher than the field capacity. Liming decreased the content of exchangeable manganese in the soil more than would have been expected on the basis of the change in pH values. The manganese content and manganese uptake of the crop were also reduced. Adding large amounts of manganese (Mn 51,5 kg/ha*20 cm) did not prevent liming (calcite 14 t/ha*20cm) from reducing the manganese content of the yield.

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“…Cation-exchange resin methods have been used to estimate reserve-K both overseas (Haagsma & Miller 1963;Waddy & Vimpany 1971;Goulding 1984) and in New Zealand (Lee & Gibson 1974). Although the methods rank the K release characteristics of soils well, they extract considerable amounts of K not usually available to plants and the amounts of K extracted are not affected by cropping.…”

Section: Introductionmentioning

confidence: 99%

A modified sodium tetraphenylboron method for the routine determination of reserve-potassium status of soil

Jackson¹

1985

New Zealand Journal of Experimental Agriculture

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A method was developed and tested which is suitable for the routine determination of the reserve-potassium (reserve-K) level of soili.e., K which is plant-available but not exchangeable to 1M ammonium acetate. The method is simple, relatively quick, and uses 2 g soil and 20 ml 0.03M sodium tetraphenylboron (NaTPB) in 1M sodium chloride with a 16 h extraction time. The KTPB precipitated is dissolved in an acetone medium and analysed directly by atomic absorption spectrophotometry. The NaTPB method was compared with 4 other measurements of soil K status: New Zealand Ministry of Agriculture and Fisheries Quick Test for K (STK), K exchangeable to ammonium acetate by leaching (1(..,), boiling nitric acid extractable K (1(..), and K extracted by 0.05M barium acetate at pH 5.0. These methods were tested by correlation of the extraction results with dry matter yield, total K uptake, and % K in ryegrass (Lolium perenne L.) grown to exhaustion on 13 soils of varying K status. The new method was then validated against the same ryegrass parameters for a further 25 soils exhausted of K in a separate glasshouse trial. K TPB , the quantity of K extracted by the NaTPB method, was highly correlated with K uptake by ryegrass (n = 13, r 2 = 0.90***; n = 25, r 2 = 0.94***), with yield (n = 13, r 2 = 0.74***; n = 25, r 2 = 0.56***), and with % K in herbage (n = 13, r 2 = 0.77***; n = 25, r 2 = 0.85***). It was generally superior to the other K measurements in all correlations examined. The method is sensitive to changes in K status caused by K uptake by plants and can identify K uptake from soil reserves after minimum levels of 1(.., (or STK) are reached. K T PB levels are less likely to be affected by seasonal variation than are STK levels. The NaTPB method is not suited to very large batch sizes and would be best used as a supplement to STK level measurements to establish the reserve-K content of soil. The method determines shortto medium-term availability of K, rather than the long-term availability indicated by the K, level. It would be most useful for soils which have significant reserve-K and in the low-medium STK range « 8).

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Estimation of non‐exchangeable potassium in soils using a cation‐exchange resin

Cited by 6 publications

References 18 publications

Magnesium in New Zealand Soils

Magnesium in New Zealand Soils

Determination of plant-available manganese in Finnish soils

A modified sodium tetraphenylboron method for the routine determination of reserve-potassium status of soil

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