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  • Articles  (7)
  • Iron  (7)
  • 1980-1984  (7)
  • 1945-1949
  • 1983  (7)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (7)
Collection
  • Articles  (7)
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Keywords
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Years
  • 1980-1984  (7)
  • 1945-1949
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Soil moisture influence on micronutrient cation availability under aerobic conditions (1983)
    Springer
    Plant and soil 72 (1983), S. 77-83 
    Details
    ISSN: 1573-5036
    Keywords: Copper ; Gezira soils ; Iron ; Micronutrient availability ; Microbial activity ; Manganese ; Oxidation ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The three major soil series comprising the Gezira scheme (Sudan) are Hosh, Suleimi, and Laota. Surface soil samples from each soil series were employed to study the effect of soil moisture on the DTPA-extractable micronutrient cation under aerobic conditions. The study continued for 8 weeks using an incubation technique at two levels of soil moisture (continuously moist and moist/dry cycles). The DTPA-extractable Cu, Fe, Mn and Zn from air-dry soil samples were much higher compared to values from their incubated counterparts. For the three soils the CO2 production (microbial activity) reached the maximum in 5 weeks and then levelled off while the lowest values of micronutrient cation from the incubated soils were obtained between 2 to 8 weeks. Generally, the study suggests that the hot dry months preceding crop growth should increase clay surface acidity and hence availability of mironutrient cations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185096
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of soil salinity on the electro-chemical and chemical kinetics of some plant nutrients in submerged soils (1983)
    Springer
    Plant and soil 75 (1983), S. 455-472 
    Details
    ISSN: 1573-5036
    Keywords: Ammonification ; Eh ; Flooded soils ; Iron ; Manganese ; Nitrate reduction ; Phosphorus ; pH ; Salinity and extractable cations ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The electro-chemical and chemical kinetics of six California rice soils were significantly influenced by the presence of salts up to an EC of 9 mmhos/cm in saturation extract (ECe). Subsamples of each soil salinity treatment were incubated for periods up to 10 weeks after flooding. Most of the changes in Eh and pH values took place in the first 3–4 weeks after submergence. Salinity decreased pH values, but slightly increased the redox-potential. Both ammonification and nitrate reduction were significantly decreased, by increasing soil salinity. Salinity up to 9 mmhos/cm did not affect levels of Bray and Kurtz extractable P, but increased the water extractable Ca, Mg, K and Mn. In DTPA extract, salinity in incubated soils had no effect on Zn in 4 soils, but it decreased Fe in acid and neutral soils. Possible explanations for the electro-chemical and chemical kinetic changes due to flooding and salinity are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02369980
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  • 3
    Electronic Resource
    Electronic Resource
    Plant genotype differences in the uptake, translocation, accumulation, and use of mineral elements required for plant growth (1983)
    Springer
    Plant and soil 72 (1983), S. 175-196 
    Details
    ISSN: 1573-5036
    Keywords: Boron ; Calcium ; Copper ; Genotypic differences ; Iron ; Magnesium ; Manganese ; Mineral nutrition ; Molybdenum ; Nitrogen ; Phosphorus ; Plant adaptation ; Plant breeding ; Potassium ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Plant genotypes differ in their uptake, translocation, accumulation, and use of mineral elements. Examples of genotype differences to iron, nitrogen, phosphorus, potassium, calcium, magnesium, manganese, boron, copper, zinc, and molybdenum are discussed. Current knowledge is sufficient to indicate that many crop plants can be improved for the efficient use of mineral elements and better adaptation to mineral stress conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181957
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  • 4
    Electronic Resource
    Electronic Resource
    Nutrient inflows into apple roots (1983)
    Springer
    Plant and soil 71 (1983), S. 371-380 
    Details
    ISSN: 1573-5036
    Keywords: Apple ; Calcium ; Copper ; Iron ; Irradiance ; Magnesium ; Manganese ; Nitrogen ; Nutrient uptake rate ; Phosphorus ; Potassium ; Scion effects ; Season ; Source of nitrogen ; Temperature ; Tissue nutrient level ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The rates of uptake of nutrients from solution by apple roots were measured (a) in a root laboratory, using intact roots of mature trees growing under field conditions and (b) in controlled environment using young trees. Maximum nitrate inflows into Discovery/M.9 roots under field conditions were only slightly lower than those into roots of the same genotype in controlled environment, but up to 80 times lower than those into roots of Worcester Pearmain seedlings. At any given external P concentration, P inflows into roots of field-grown trees were about 2.5-times lower than those into the roots of young trees in controlled environment. Nitrate inflows were constant above a solution concentration of 20 mmol m−3 in both field-grown and small trees. In both cases, phosphate inflows increased linearly with solution concentration up to 10 mmol m−3. Among the various plant and environmental factors influencing nutrient uptake characteristics of apple roots were: the scion genotype, tissue nutrient levels, root origin, the form in which N is supplied, level of irradiance of the shoot, root temperature and the season of the year. The effects of these factors are illustrated with examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182678
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  • 5
    Electronic Resource
    Electronic Resource
    The acquisition of phosphorus byLupinus albus L. (1983)
    Springer
    Plant and soil 70 (1983), S. 107-124 
    Details
    ISSN: 1573-5036
    Keywords: Citrate ; Iron ; Lupins ; Lupinus albus L. ; Phosphorus ; Polymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Large quantities of citrate ions have been shown to be secreted by the roots ofLupinus albus. It is postulated that these react in the soil to form ferric hydroxy phosphate polymers which diffuse to the root surface where they are degraded by the action of reducing agents in the presence of an Fe II uptake mechanism balanced by hydrogen ion secretion. Some known chemical behaviour of Fe III and citrate which supports this postulate is reviewed. Evidence is also presented which suggests that much of the Fe absorbed circulates within the root system and is subsequently precipitated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374754
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  • 6
    Electronic Resource
    Electronic Resource
    Manganese and iron interactions on their uptake and distribution in soybean (Glycine max (L.) Merr.) (1983)
    Springer
    Plant and soil 70 (1983), S. 317-326 
    Details
    ISSN: 1573-5036
    Keywords: Glycine max (L.) Merr. ; Iron ; Manganese ; Soybean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The uptake and distribution of iron and manganese were studied in a manganese-sensitive soybean cultivar (‘Bragg’) grown over a range of supply levels of these nutrients in solution culture. At high (90 and 275 μM) manganese levels, increasing the iron concentration in solution from 2 to 100 μM partially overcame the effects of manganese toxicity. Interactions between manganese and iron occurred for dry matter yields, rate of Mn absorption by the roots, and the proportions of manganese and iron transported to the tops. No interaction was observed for the rate of root absorption of iron. The percentage distribution of manganese in the plant top increased with increasing iron, despite a reduced rate of Mn uptake. On the other hand, iron uptake was independent of solution Mn concentration and increased with increasing solution Fe. Also more iron was retained in the roots at high Mn and/or Fe levels in solution. Concentrations of manganese and iron in roots, stems and individual leaves were affected independently by the manganese and iron supplyi.e. without any interaction occurring between the two elements. In general, the concentration in a plant part was related directly to the solution concentration. Symptoms resembling iron deficiency correlated poorly with leaf Fe concentrations whereas high levels of manganese were found in leaves displaying Mn toxicity symptoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374888
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of humic acid on iron required for the formation of hydroxyproline in discs ofBeta vulgaris L. storage tissue (1983)
    Springer
    Plant and soil 73 (1983), S. 27-34 
    Details
    ISSN: 1573-5036
    Keywords: Beta vulgaris ; Cell walls ; Chelating agents ; Humic acid ; Hydroxyproline ; Iron ; Proline ; Proteins ; Storage tissue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary When discs of beetroot storage tissue are washed (aged) in water for three days, there is at least a 100 per cent increase in the content of their cell-wall bound hydroxyproline. Humic acid, prepared from an agricultural soil, enhances this increase. The effects of humic acid on the increase in the hydroxyproline content of cell walls, as well as on the formation of14C-labelled hydroxyproline from14C-proline, are compared with those effects produced by the chelating agents 2,2′-dipyridyl and 8-hydroxyquinoline. It is suggested that humic acid enhances hydroxyproline formation either by a mechanism which renders more ferrous iron available for the hydroxylation of proline to hydroxyproline within the tissue, and/or a mechanism which stimulates the enzyme required for the hydroxylation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197754
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