Reactions and Movement of Edta and Zn Edta in Soils

Cheng, Shuailong; Thomas, R. L.; Elrick, D. E.

doi:10.4141/cjss72-045

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…It is, however, apparent that the stability constants for EDTA complexes are much higher than those for soil-organic matter complexes, in line with the ability of this reagent to extract chelated metals from soils. In conformity with the more general findings of Norvell and Lindsay (1969), Cheng et al (1972) observed that in a Canadian loam soil Zn is displaced from a Zn-EDTA complex by Fe. EDTA but not alanine (Zn stability constant 5-2) can remove Zn from a soil (Himes & Barber 1957), while for various Scottish soils naturally occurring 2-ketogluconic acid extracts less Co, Cu and Ni than does EDTA, but more than ammonium acetate, at pH 7 (Berrow unpublished).…”

Section: Forms Of Occurrence Of Mobilised Trace Elementssupporting

confidence: 87%

Location of trace elements in soil profiles: total and extractable contents of individual horizons

Berrow¹,

Mitchell²

1980

Transactions of the Royal Society of Edinburgh: Earth Sciences

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Total contents of 29 trace and major elements and extractable contents of 20 elements were determined in the horizons of 4 profiles, 2 freely drained and 2 very poorly drained, of Scottish soils on drifts of basic igneous or granitic origin. The probable behaviour of other elements is suggested in the light of the results obtained. It is shown that in the course of pedological weathering, many elements are mobilised and become extractable by relatively weak reagents such as ammonium acetate (when readily exchangeable), dilute acetic acid (when less readily exchangeable or acid-soluble) or EDTA (when chelated or exchangeable). The forms in which different elements occur in the different horizons are assessed. In the surface horizons rich in organic matter many elements, such as Co, Ni, Fe, V, Cu, Cd, Sn and Pb, appear to occur mainly in chelated form; fewer, particularly Mn, are only in exchangeable form with plant uptake being largely responsible. Lower in the profiles the most common forms are acetic acid-soluble or, in gleyed horizons, exchangeable. In these horizons the degree of mobilisation is greater than in the corresponding freely drained horizons, the effect being most apparent for elements in readily weathered minerals.

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Section: Forms Of Occurrence Of Mobilised Trace Elementssupporting

confidence: 87%

Location of trace elements in soil profiles: total and extractable contents of individual horizons

Berrow¹,

Mitchell²

1980

Transactions of the Royal Society of Edinburgh: Earth Sciences

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“…A layer resembling the enrichment horizon of a podsol soil was found in the lower part of the soil profile in the pots irrigated with Na 2 -EDTA. This supports the observation made by CHENG et al (1972) that EDTA is easily leached in soil.…”

Section: Resultssupporting

confidence: 92%

Uptake of soil P, Al, Fe, Mn, Mg and Ca by Italian rye grass (Lolium multiflorum Lam.) induced by synthetic chelating agent

Hartikainen

1981

AFSci

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Abstract. The effect of a synthetic chelating compound on the dry matter yield and the uptake of soil P, Al, 33-120 %. On the basis of the first two harvests the manganese absorption by the rye grass seemed to decrease probably due to the enormous accumulation of iron. The results also suggested that the addition of Na 2 -EDTA to the soil was not able essentially to affect the magnesium and calcium supply to the plants.

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“…The influence of inherent organic compounds on the mobility of Zn in soils has received much study. Himes and Barber (1957), Hodgson et al (1965, 1966 The stabilities of synthetic chelates permit their move ment through the soil (Stewart and Leonard, 1956;Cheng et al, 1972;Prasad et al,, 1976). It has been shown that signifi cant exchange between soil Zn and the ZnEDTA chelate can take 97 place in soils (Cheng et al, 1972;Wallace and Mueller, 1959).…”

Section: This Is Evidenced By the Loss In Effectiveness Of Inorganicmentioning

confidence: 99%

“…Himes and Barber (1957), Hodgson et al (1965, 1966 The stabilities of synthetic chelates permit their move ment through the soil (Stewart and Leonard, 1956;Cheng et al, 1972;Prasad et al,, 1976). It has been shown that signifi cant exchange between soil Zn and the ZnEDTA chelate can take 97 place in soils (Cheng et al, 1972;Wallace and Mueller, 1959). Prasad et al (1976) Soil-applied ZnEDTA has often been shown to be more ef ficient than ZnSO^ in supplying Zn to plants (Stewart and Leonard, 1956;Holmberg, 1957, Lingle et al, 1958;Boawn et al, 1957;Shukla and Morris, 1967;Schnappinger et al, 1972;Boawn, 1973;Mortvedt, 1979).…”

Section: This Is Evidenced By the Loss In Effectiveness Of Inorganicmentioning

confidence: 99%

“…This was because the variation in clay content within many of the profiles was assumed to be small (Soil Survey Staff, 1966. Inorganic Zn sources have been shown to be relatively immobile in many soils Leonard, 1956j Barrows et al, 1960;Cheng et al, 1972). This immobilization has, been attributed to the reaction of Zn with clay (Shuman, 1975;Khan, 1979), organic matter (Himes and Barber, 1957;Miller and Ohlrogge, 1958a,b;Shuman, 1975), carbonates (Jurinak and Bauer, 1956;Udo et al, 1970), silicates (Lindsay, 1972b) for Zn in soils (Hodgson et al, 1967;Lindsay, 1972b;Prasad et al, 1976).…”

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Investigations into the need for zinc fertilization of selected Iowa soils

Mascianica

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Webster soil association area and found that 60% of the samples from calcareous soils contained less than 20 ppm Zn and 18% had less than 15 ppm Zn. The critical level of Zn in corn leaf tissue has been suggested as below 20 ppm (Jones and Eck, 1973), although others (Jones, 1967; Viets et al., 1953) have proposed critical levels as low as ppm. It seems reasonable to assume that the critical level might vary with different soils, environments, corn cultivars, and other factors. A number of investigators (Massey and Loeffel, 1966, 1967; Shukla and Raj, 1976; Shuman et al., 1976) have observed that corn inbreds and single crosses vary in the amount of Zn they accumulate under constant conditions. Halim et al. (1968) considered this to be an important reason that tissue Zn content was frequently not closely related to Zn deficiency symptoms. The Zn soil test in use at the Iowa State University Soil Testing Laboratory (ISUSTL) involves a chelate (DTPA) extraction developed in Colorado by Lindsay and Norvell (1978). In 1977, an unpublished summary of the results from 3,786 Zn analyses performed at the ISUSTL showed that 62% of the soils tested adequate (about 1.0 ppm Zn), 25% were defined as mar ginal (0.6-1.0 ppm), and 13% were classed as deficient (0.5 ppm or less). An updated summary by Eik (1980) involved 12,869 samples and showed 57%, 29%, and 14% testing in the 7 adequate, marginal, and deficient ranges, respectively. Gogan (1975) achieved a predictive success of 75% in separating Iowa soils into nonresponsive and responsive classes for corn grown under greenhouse conditions, when a value of 1.30 ppm DTPA-extractable Zn was chosen as the critical soil test level. This value exceeds that of 0.8 ppm Zn established for corn under greenhouse conditions in Colorado by Lindsay and Norvell (1978) and of 0.5 ppm Zn in California by Brown et al. (1971). Apparent differences in these defined critical levels were probably due to variation in the experimental preparation, corn cultivars, cropping techniques, or to possible differences in physical-chemical properties among the Iowa, California, and Colorado soils. The existence of a critical DTPA-extractable Zn level for corn grown under field conditions in the riorthcentral United States has escaped the attention of this investigator. Field studies were initiated in 1977 and 1978 to determine whether corn grown on selected Iowa soils would respond to Zn fertilization. Two inorganic Zn fertilizers were included to assure that any measured responses were not dependent on the applied Zn source. It was hoped that any response could be related to soil, environmental, and source characteri sties. In 1979, studies involving soil injection of a chelated Zn solution (ZnEDTA) were started. These were instigated 8 primarily because of concern as to whether failure to obtain response to Zn fertilization in the earlier experiments was due to Zn placement or large variations in plant popula tion within experimental areas. 9 MATERIALS AND METHODS Experimental Procedures Long-term studies ...

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Reactions and Movement of Edta and Zn Edta in Soils

Cited by 5 publications

References 5 publications

Location of trace elements in soil profiles: total and extractable contents of individual horizons

Location of trace elements in soil profiles: total and extractable contents of individual horizons

Uptake of soil P, Al, Fe, Mn, Mg and Ca by Italian rye grass (Lolium multiflorum Lam.) induced by synthetic chelating agent

Investigations into the need for zinc fertilization of selected Iowa soils

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