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  • Iron  (6)
  • Springer  (6)
  • Oxford University Press
  • 1980-1984  (6)
  • 1981  (6)
Collection
Keywords
Publisher
  • Springer  (6)
  • Oxford University Press
Years
  • 1980-1984  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Proteoid root morphology and function inLupinus albus (1981)
    Springer
    Plant and soil 60 (1981), S. 143-147 
    Details
    ISSN: 1573-5036
    Keywords: Acidity ; Iron ; Lupinus albus ; Manganese reduction ; Proteoid roots ; Root exudates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Current theories of phosphorus uptake by plants imply that they can augment diffusion to their root axes by the development of abundant root hairs or mycorrhizas. Some phosphorus efficient plants have root morphology with multi-branched roots and localised regions of densely packed root hairs, which we suggest is better suited to the retention of substances exuded by the roots than uptake of substances moving to the root by diffusion. Evidence of substantial exudation by the proteoid roots ofLupinus albus is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02377120
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of calcium carbonate and organic matter on the growth and concentration of iron and manganese in sorghum (Sorghum bicolor) (1981)
    Springer
    Plant and soil 60 (1981), S. 295-300 
    Details
    ISSN: 1573-5036
    Keywords: Calcium carbonate ; Iron ; Manganese ; Organic matter ; Sorghum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of CaCO3 and organic matter on the availability of iron and manganese was studied on sorghum (Sorghum bicolor). Addition of calcium carbonate caused significant decrease in dry matter and grain yield. But yields tended to increase with the addition of organic matter at the rate of 15 t/ha. The iron concentration decreased with the addition of CaCO3 at all the stages of crop growth. Like iron, concentration of manganese also decreased with the increase in added CaCO3. Organic matter increased the iron concentration both at seedling and flowering stage. The concentration of manganese was, however, dependent on the stage of the crop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374113
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  • 3
    Electronic Resource
    Electronic Resource
    Self-diffusion of zinc and iron in soils as affected by pH, CaCO3, moisture, carrier and phosphorus levels (1981)
    Springer
    Plant and soil 63 (1981), S. 377-393 
    Details
    ISSN: 1573-5036
    Keywords: Capacity factor ; Iron ; Self-diffusion coefficients ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Self-diffusion coefficients of zinc and iron were determined in acid soil of Palampur and alluvial soil of Ludhiana under varying pH, CaCO3, moisture, carrier and phosphorus levels. Increase in pH caused tremendous reductions in self-diffusion coefficients (Da) of both zinc and iron in soil. The selfdiffusion coefficients of both these elements were drastically reduced as a result of CaCO3 application. The Da values of zinc and iron increased with the decrease in moisture tension and increase in carrier and phosphorus levels. The decrease in Da values were associated with increase in capacity factor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370038
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of waterlogging and lime or organic matter additions on the distribution of trace metals in an acid soil (1981)
    Springer
    Plant and soil 59 (1981), S. 317-326 
    Details
    ISSN: 1573-5036
    Keywords: Acid soil ; Complexed metals ; Iron ; Iron oxides ; Lime ; Manganese ; Manganese oxides ; Organic matter ; Redistribution ; Trace metals ; Waterlogging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A study has been made of the influence of waterlogging on the distribution of trace metals between the various reservoirs in which they are held in a soil. Selective extractants have been used to remove metals held in 4 ways: soil solution and exchangeable; specifically adsorbed by inorganic sites; adsorbed or chelated by organic sites; adsorbed onto oxide surfaces. Waterlogging over a period of 16 weeks resulted in the release of both manganese and iron from the organic — and oxide — bound reservoirs to the soluble, exchangeable and inorganic reservoirs. Addition of both 1% dried grass (as an actively decomposing organic material) and 1% CaCO3 to the soil resulted in an acceleration of the metal redistribution. For manganese, selective extraction methods accounted for the distribution of all the metal in the reservoirs studied. In the case of iron however, there appeared to be some release from a reservoir not being extracted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02184203
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  • 5
    Electronic Resource
    Electronic Resource
    Tissue Fe/Zn ratio as a diagnostic tool for prediction of Zn deficiency in crop plants (1981)
    Springer
    Plant and soil 60 (1981), S. 357-367 
    Details
    ISSN: 1573-5036
    Keywords: Critical Fe/Zn ratio ; Critical Zn level ; Diagnostic tool ; Iron ; Zinc ratio ; Zinc deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Critical Zn levels in tissues currently used for the prediction of Zn deficiency in crop plants often fail to explain the anomaly of diminished yield levels in spite of the higher tissue Zn levels, much above the critical Zn levels in crop plants. The study on tissue Zn content, Fe content and tissue Fe/Zn ratios in maize (at the time of appearance of deficiency symptoms-25 day old plants) reveals that the tissue Fe/Zn ratio appears to be a promising diagnostic tool for the prediction of Zn deficiency in crop plants. It also explains the phenomenon of diminished yield levels associated with the high Zn levels often much above the critical Zn levels in crop plants. Correlations between dry matter yields and tissue Fe/Zn ratios were found to be negative and significant. This shows that the yield diminishes as the tissue Fe/Zn ratio increases beyond a certain critical Fe/Zn ratio. Relative per cent yields against the tissue Fe/Zn ratios were plotted using the approach of Cate and Nelson2 which shows that there is a certain critical Fe/Zn ratio in crop plants beyond which there is a hidden Zn deficiency and a probable response to Zn application. Critical Fe/Zn ratio in maize was found to be around 6.0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02149632
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of P and Mn on growth response and uptake of Fe, Mn and P by sorghum (1981)
    Springer
    Plant and soil 62 (1981), S. 15-22 
    Details
    ISSN: 1573-5036
    Keywords: Growth ; Interactions ; Iron ; Manganese ; Phosphorus ; Sorghum ; Uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effects of P and Mn on growth response and uptake of Fe, Mn and P by grain sorghum were investigated using nutrient culture. High P and Mn concentrations in solution (greater than 40 and 1 mg/l for P and Mn, respectively) markedly reduced plant height and shoot and root dry weight of 4-week-old sorghum plants. High Mn concentrations in solution increased the concentrations of Mn and P in shoot tissue and uptake of Mn, but depressed the uptake of P. High levels of P enhanced Mn uptake by sorghum and accentuated Mn toxicity at low Mn levels. The tissue Fe and total uptake of Fe were both reduced markedly by the high levels of P and Mn concentrations in solution. The increases of P, Mn and Fe concentrations in root tissue with a concomitant decrease of Fe in shoots suggested that the translocation of Fe from roots to shoots was hindered under high P and Mn conditions. Since coating occurred on root surfaces and intensified with increasing Mn concentrations in the substrate, part of the reduction of Fe in shoots could be attributed to the formation of high valent manganese oxides on the root surfaces which may retain Fe and reduce its absorption by sorghum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02205021
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