Library

X
Language
Preferred search index
Number of Hits per Page
Default Sort Criterion
Default Sort Ordering
Size of Search History
Default Email Address
Default Export Format
Default Export Encoding
Facet list arrangement
Maximum number of values per filter
Auto Completion
Feed Format
Maximum Number of Items per Feed
Permalink If you want to be able to use settings permanently, you must save your settings and then set a Bookmark to the permalink
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
    Solubility of Calcium Phosphate in Calcareous Soils (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 1211-1212 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A series of soil mixtures varying in their calcium carbonate content was prepared by mixing two soils, one low in calcium carbonate and the second, highly calcareous. Other measured properties of the two soils used in the mixtures were similar (Table 1). Table 1. SOME OF THE PROPERTIES OP THE Two ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1931211a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Correction of lime-induced chlorosis by application of iron and potassium sulphates (1987)
    Springer
    Nutrient cycling in agroecosystems 13 (1987), S. 161-167 
    Details
    ISSN: 1573-0867
    Keywords: lime-induced chlorosis ; iron sulphate ; potassium sulphate ; ammonium sulphate ; chlorophyll content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of: iron sulphate in an acid urea medium, potassium sulphate, three mixtures of potassium sulphate with iron sulphate, a mixture of potassium chloride with iron sulphate, ammonium sulphate with nitrification inhibitor (DCD) plus iron sulphate and, finally, sequestrene, in correcting iron chlorosis in peanuts (Arachis hypogea) on a soil containing 65% CaCO3, pH 7.6, known to induce chlorosis, were tested in pot experiments. The potassium sulphate-iron sulphate mixtures were as effective as sequestrene or more so in correcting chlorosis. The potassium chloride mixture and the ammonium sulphate-DCD-iron sulphate mixture were less effective, the latter probably because of ammoium toxicity. Iron sulphate or potassium sulphate alone had no effect. The effective correction of iron chlorosis requires simultaneous application of iron and potassium sulphates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01064829
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Interaction of ammonium and nitrate nutrition with potassium in wheat (1988)
    Springer
    Nutrient cycling in agroecosystems 17 (1988), S. 137-146 
    Details
    ISSN: 1573-0867
    Keywords: Ammonium-nitrate-potassium interaction ; accumulation of reduced nitrogen ; wheat ; nitrification inhibitor ; grain ; stover
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A greenhouse experiment with wheat in 3L pots filled with a sandy loam soil in a factorial design was conducted to determine the effect of potassium on nitrogen utilization. Nitrogen was applied in three NH4-N/NO3-N ratios, 0/100, 25/75 and 50/50, at three levels: 0.75, 1.50 and 3.00gN/pot, and potassium was applied at three levels: 0, 0.5 and 1.0gK/pot. The higher levels of nitrate nitrogen with or without potassium reduced dry matter yields drastically, while the same levels of a NH4-N/NO3-N mixture of 50/50 with applied potassium reduced yields only slightly. Highest grain yield and total yield were obtained with a 25/75 mixture of ammonium/nitrate nitrogen with added potassium. Potassium addition to soil increased the utilization of nitrogen fertilizers, particularly when the ratio of ammonium to nitrate was increased. The highest uptake of reduced nitrogen was at the highest level of the ammonium to nitrate nitrogen ratio (50/50) when potassium was applied. Tillering was enhanced by an increased ammonium ratio in the nitrogen mixture, and by potassium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01050274
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Lowering ammonia volatilization losses from urea application by activation of nitrification process (1981)
    Springer
    Nutrient cycling in agroecosystems 2 (1981), S. 101-107 
    Details
    ISSN: 1573-0867
    Keywords: ammonia volatilization ; nitrification rate ; urea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The aim of this work was to lower ammonia volatilization losses by increasing the rate of nitrification. This was achieved by eliminating the gap in timing between urea hydrolysis and ammonium nitrification. Soils were pretreated with a small amount of ammonium salt which led to the activation of the nitrification process. When nitrification passed its lag period, urea was applied to the soils. Ammonium produced by urea hydrolysis was quickly oxidized into nitrate and did not accumulate in the soil. This resulted in decreased ammonium concentrations in soil, and consequently, in decreased ammonia volatilization losses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01080096
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Fertigation for minimizing environmental pollution by fertilizers (1995)
    Springer
    Nutrient cycling in agroecosystems 43 (1995), S. 5-7 
    Details
    ISSN: 1573-0867
    Keywords: fertigation ; fertilizer application ; irrigation ; nutrients requirements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Intensification of agriculture by irrigation and enhanced use of fertilizers may generate pollution by increased levels of nutrients in underground and surface waters. Most of the irrigation is by open systems having a relatively low efficiency of water application. A higher efficiency may be gained by pressurized irrigation systems. Drip irrigation generates a restricted root system requiring frequent nutrient supply that may be satisfied by applying fertilizers in irrigation water, i.e. by fertigation. Maximization of crop yield and quality and minimization of leaching below the rooting volume may be achieved by managing fertilizers concentrations in measured quantities of irrigation water, according to crop requirements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00747675
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Efficiency of fertilizers as nitrogen sources to banana plantations under drip irrigation (1985)
    Springer
    Nutrient cycling in agroecosystems 8 (1985), S. 101-106 
    Details
    ISSN: 1573-0867
    Keywords: ammonium-nitrate-nutrition ; banana fertilization ; drip irrigation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In a field experiment with bananas under drip irrigation in the semiarid and warm Jordan Valley, on a highly calcareous soil, application of urea, ammonium nitrate and potassium nitrate were compared. All treatments received equal amounts of N, P and K. The rate of growth and yield were higher on plots receiving urea and ammonium nitrate than on those receiving potassium nitrate. This was explained by a continuous balanced nitrate-ammonium-nitrogen nutrition in the first two treatments, while in the potassium nitrate treatment more nitrate than ammonium was available to the plants during the earlier growth period. Ammonium concentrations found in the soil profile indicate a partial inhibition of nitrification in the drip-irrigated system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048893
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Interaction of root distribution of corn with fertilizer placement and frequency of irrigation in lysimeters (1991)
    Springer
    Nutrient cycling in agroecosystems 28 (1991), S. 49-54 
    Details
    ISSN: 1573-0867
    Keywords: Fertilizer placement ; irrigation frequency ; root distribution ; corn ; lysimeters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In a factorial design lysimeter experiment with corn, in a sandy loam soil, two irrigtion frequencies (low (IL) and high (IH)) and two ways of fertilizer placement (shallow (FS) and deep (FD)), were applied. The plants did not suffer from stress under either water regime. Tillering, degree of grain filling and distribution of nitrogen between the grain and vegetative plant parts, indicated an enhanced plant development in the FS treatment. The IH-FS treatment showed the highest root density in the upper soil layer and the highest grain yield and reduced-nitrogen yield in grain. Results indicate that fertilizer placement influences root density distribution in the soil profile and consequent corn yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048855
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Phosphate rocks and partially-acidulated phosphate rocks as controlled release P fertilizers (1993)
    Springer
    Nutrient cycling in agroecosystems 35 (1993), S. 25-31 
    Details
    ISSN: 1573-0867
    Keywords: Partially acidulated phosphate rocks ; phosphate rock dissolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Properties of phosphate rocks (PRs) and partially acidulated phosphate rocks (PAPRs) which affect the pattern of P dissolution and thus the potential for manipulating the rate of P release are reviewed. The effects of soil and plant properties are also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00750217
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Partially acidulated phosphate rocks: Phosphorus release characteristics (1990)
    Springer
    Nutrient cycling in agroecosystems 22 (1990), S. 109-117 
    Details
    ISSN: 1573-0867
    Keywords: Partially acidulated phosphate rock ; inorganic phosphate fractionation ; phosphate dissipation ; phosphate release
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Five phosphate rocks varying in formic acid P solubility from 18.9 to 52.7%, expressed as percentage of total P, were acidulated with phosphoric or sulphuric acids to 0, 20%, 33% and 50% of full acidulation and granulated. In an incubation experiment fertilizer granules of diameter 1–2 mm were mixed with two acid soils and after 1 week incubation soil samples were extracted with a 0.5 M NaOH solution. In a dissipation experiment single fertilizer granules of 4 mm diameter were implanted into soil, incubated for 1 and 4 weeks and inorganic P fractionation in the residual granules and the surrounding soil was performed. Dissipated P was greater than the water soluble P content of the partly acidulated phosphate rock fertilizers indicating the dissolution of the non-acidulated phosphate rocks. The amount of P dissipated was related to the initial water soluble P content and to the formic acid solubility of phosphate rocks used for manufacturing the fertilizers. The P dissipated increased with an increase in soil acidity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01116184
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Uneven distribution of banded fertilizer nitrogen in the field related to computer modelling (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 379-383 
    Details
    ISSN: 1573-0867
    Keywords: band placement ; computer modelling ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A model was developed to describe the distribution of mineral nitrogen when applied in a fertilizer band, taking into account nitrification and diffusion. Good agreement was found between the calculated values and those measured in a field experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048941
    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...