Full TGIF Record # 200604
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1968.tb00552.x/pdf
    Last checked: 03/28/2012
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Publication Type:
Author(s):Cowling, D. W.
Author Affiliation:The Grassland Research Institute, Hurley, Berkshire
Title:Ammonia as a source of nitrogen for grass swards
Source:Grass and Forage Science. Vol. 23, No. 1, March 1968, p. 53-60.
# of Pages:8
Publishing Information:[Oxford, England, United Kingdom]: Blackwell Publishing Ltd.
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1968.tb00552.x/abstract
    Last checked: 03/28/2012
    Notes: Abstract only
Keywords:TIC Keywords: Ammonium nitrate; Aqueous ammonia; Dry weight; Fertilizer evaluation; Grassland management; Nitrogen recovery; Nitrogen uptake
Abstract/Contents:"Aqueous ammonia was injected to a depth of 10 cm into small grass plots in late winter at rates equivalent to 200 and 400 kg N per ha. The effect on yield of DM, seasonal distribution of yield and uptake of N in the herbage was compared with that of single or split applications of ammonium nitrate. Two levels of supplementary irrigation were given in summer. The method of injection minimised damage to the sward and loss of ammonia by volatilization. Aqueous ammonia and ammonium nitrate (single application) gave similar yields of dry matter, uptake of N and distribution of yield over the season. Ammonia was no more effective than ammonium nitrate under dry conditions. A single application in February of 200 kg N/ha as ammonium nitrate gave a greater total annual yield than the same quantity of N as ammonia or as a split dressing of the solid fertilizer. At 400 kg N/ha, split application gave the highest yields. The uptakes of N in the harvested grass was similar, in each irrigation treatment and at each level of N, for the three methods of applying N. The apparent recovery was low. Aqueous ammonia, efficiently injected, was a satisfactory form of N for grass at the first cut, but it did not provide a continuing supply of N for crops harvested later in that season."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cowling, D. W. 1968. Ammonia as a source of nitrogen for grass swards. Grass Forage Sci. 23(1):p. 53-60.
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DOI: 10.1111/j.1365-2494.1968.tb00552.x
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    Last checked: 03/28/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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