Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Silicic Acid and the Reaction of Zinc with Clays (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 852-852 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In my experiments, the increase in the sorption of zinc caused by the presence of silicic acid, designated rZnsi, occurred under conditions which did not result in the precipitation of zinc compounds from pure solutions in the absence of clay. In the presence of montmorillonite the interaction of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/214852a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Distribution and budget of cadmium and lead in an agricultural region near Adelaide, South Australia (1991)
    Springer
    Water, air & soil pollution 57-58 (1991), S. 171-180 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The principal natural and anthropogenic factors important in determining the regional distributions and relationships of Cd and Pb were studied by field sampling of stream waters, soils, pasture plants and rainfall of an agricultural area thought to represent typical ‘background’ for toxic metals. Cadmium in surface soils has a distribution associated with phosphate fertilizer use, geochemistry of parent materials, and atmospheric fallout of urban origin. Lead contamination of surface soils and rainfall decreases with distance from the urban area, the principal source of contaminant Pb being automotive emissions. For both elements, soil was the main sink. Losses of Pb and Cd in stream waters and agricultural products are negligible when compared with inputs, leading to a gradual accumulation in surface soils. With current fertilizer practice, extractable-Cd concentrations in surface soils will approximately double within about 20 yr. Similar increases in soil Pb will require at least 200 yr if the diminishing use of Pb in petrol remains the only significant source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282880
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Understanding zinc reactions in vertisols to predict zinc responses by wheat (1993)
    Springer
    Plant and soil 155-156 (1993), S. 247-250 
    Details
    ISSN: 1573-5036
    Keywords: rate of Zn desorption ; Vertisols ; wheat ; Zn buffer power ; Zn desorption power ; Zn intensity ; Zn quantity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Since Zn availability to plants growing in a soil is governed by quantity, intensity, buffer power, rate of Zn desorption and diffusion, an improved understanding of a number of these factors in Vertisols would facilitate a more reliable prediction of crop requirements for Zn. The DTPA-extractable Zn, a quantity factor, together with initial Zn desorption rate coefficients, accounted for 80% of the variation in relative dry matter yield of wheat grown to anthesis. In combination with these factors, desorption (buffer) power explained 92% of the variation in Zn concentration in the young mature leaf blade (YMB) of wheat. Thus, the combination of the quantity, rate of Zn desorption and buffer power better predict growth responses of wheat to applied Zn in Vertisols than the commonly-used single extraction with DTPA alone (quantity), which provides only a static measure of Zn availability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025030
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Identification of an index tissue to predict zinc status of wheat (1993)
    Springer
    Plant and soil 154 (1993), S. 161-167 
    Details
    ISSN: 1573-5036
    Keywords: critical Zn concentration ; dry matter yield ; relative yield ; wheat tissue ; youngest fully mature leaf blade
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The critical concentration of Zn in wheat tissues for the prediction of Zn response and diagnosis of Zn deficiency was examined in a glasshouse experiment with wheat (Triticum aestivum, line QT 4118) grown to anthesis in two Vertisols at Zn application rates of 0, 1.25, 2.5, 5, 10, 15 and 30 kg ha-1 equivalent as ZnSO4 7H2O. The wheat tissues examined were the youngest mature leaf blade (YMB), the leaf immediately below the youngest mature leaf blade (YMB-1), the older leaves, the ear, the stem and the whole tops. The minimum Zn concentration required in a tissue at 0.90 relative yield, referred to as the critical Zn concentration, was determined using the Cate-Nelson graphical and statistical models, the Mitscherlich equation and a two-intersecting straight lines model. The Zn status of wheat was best defined by the Zn concentration in the YMB. Although the critical Zn concentration of the YMB did not vary much with the method of estimation, the Cate-Nelson statistical procedure explained a higher percentage of the variation in Zn concentration in the YMB and relative yield than the Mitscherlich and the two intersecting straight lines models. The critical concentration of Zn in the YMB was 16.0 mg kg-1 dry matter. It is concluded that determination of Zn concentration in the YMB is the best procedure for evaluating the Zn status of wheat plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00012521
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Effect of potassic and phosphatic fertilizer type, fertilizer Cd concentration and zinc rate on cadmium uptake by potatoes (1995)
    Springer
    Nutrient cycling in agroecosystems 40 (1995), S. 63-70 
    Details
    ISSN: 1573-0867
    Keywords: cultivar ; food regulations ; salinity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In some areas of southern Australia, cadmium (Cd) concentrations in excess of the Australian maximum permitted concentration (0.05 mg kg−1 fresh weight) have been found in tubers of commercially grown potato (Solanum tuberosum L.) crops. Field experiments were therefore conducted in various regions of Australia to determine if Cd uptake by potatoes could be minimised by changes in either phosphorus (P), potassium (K) or zinc (Zn) fertilizer management. Changing the chemical form in which either P fertilizer (monoammonium phosphate, diammonium phosphate, single superphosphate and reactive rock phosphate) or K fertilizer (potassium chloride and potassium sulfate) were added to crops had little influence on tuber Cd concentrations. Fertilizer Cd concentrations also had little influence on tuber Cd concentrations, suggesting that residual Cd in the soil was a major contributor to Cd uptake by the crops on these soils. Addition of Zn at planting (up to 100 kg Zn ha−1) significantly reduced tuber Cd concentrations at four of the five sites studied. However, the largest variation was between sites rather than between treatments, with site mean tuber Cd concentrations varying tenfold (from 0.018 to 0.177 mg Cd kg−1 fresh weight). Factors associated with irrigation water quality at the sites, in particular the chloride concentration, appeared to dominate any effects of changing fertilizer type or Cd concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00749863
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The effects of soil contamination with copper, lead and arsenic on the growth and composition of plants (1986)
    Springer
    Plant and soil 95 (1986), S. 255-269 
    Details
    ISSN: 1573-5036
    Keywords: Arsenic ; Copper ; Lead ; Radish ; Silver beet ; Soil pH ; Waterlogging ; Orchard soils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effects of soil pH and a prior waterlogging treatment on the uptake of copper, lead and arsenic by radish and silver beet were investigated in a glasshouse experiment. Eight soils were compared, two of which were former orchard soils, two existing orchard soils, two dosed with copper, lead and arsenic, and two affected either by mining or by orebody mineralisation. Both the lead and copper concentrations of the plants decreased with increasing soil pH, the effect being more marked in the more highly contaminated soils. Relatively more copper than lead was translocated to the tops of the radish plants. Arsenic concentrations were less sensitive to changes in soil pH. Lower yields, lower copper concentrations in silver beet and toxicity symptoms in some acid soil treatments were more likely due to aluminium and/or manganese than to excess copper, lead or arsenic. The prior waterlogging treatment had few effects that were interpretable in terms of soil analysis or plant composition. The soils used behaved similarly no matter what the source of contamination, with two exceptions. Soils dosed with copper, lead and arsenic did not always behave in the same manner as did soils contaminated with orchard sprays in the field and some toxic elements may be occluded or locked away in a mineral form that is not available to plants. The findings emphasize problems of interpretation of results obtained with freshly amended soils compared to soils contaminated in the field. Under some conditions in contaminated soils, DTPA extractions for copper and lead may be inappropriate as the amounts extracted increased with increasing soil pH while plant uptake decreased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375077
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The effects of contamination of soil with copper, lead and arsenic on the growth and composition of plants (1986)
    Springer
    Plant and soil 91 (1986), S. 115-128 
    Details
    ISSN: 1573-5036
    Keywords: Agricultural sprays ; Arsenic ; Copper ; Fertilizers ; Lead ; Pasture plants ; Orchard soils ; Radish ; Silver beet ; Soil temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Accumulations of copper, lead and arsenic in soils affected by orchard sprays or mining were investigated in relation to their effects on growth and composition of plants. Seasonal variations in concentrations of the elements in pasture plants sampled from contaminated soils in the field are reported. The effects of soil temperature and applications of the nutrients P, S and N on the composition of plants grown in contaminated soils were investigated in glasshouse experiments. The copper concentrations of pasture species sampled from sites which were formerly orchards were usually high (20 to 60 mg kg−1) during most of the growing season and may present some risk of toxicity to grazing ruminant animals. Lead (0.8 to 21 mg kg−1) and arsenic (〈0.2 to 5.8 mg kg−1) concentrations were within, or close to the normal range of concentration in plants. In the glasshouse experiments, soil temperature was found to be an important factor in the uptake of copper, lead and arsenic. There were significant differences in uptake between genotypes. Applications of fertilizers at rates equivalent to those used for commercial vegetable production generally resulted in small decreases in the concentrations of copper, lead and arsenic concentrations in silver beet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181824
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...