Liquid nitrogen fertilizers are, per unit of N, generally cheaper than granulated ammonium nitrate because of lower production costs. Although very corrosive, the storage and handling of liquid nitrogen fertilizers does not usually present any problems. The applicability and efficiency of a commercial liquid nitrogen fertilizer (containing 39% N, half urea and half ammonium nitrate) on grassland was investigated in comparison with granulated ammonium nitrate (27% N). The liquid nitrogen fertilizer was applied on continuously grazed paddocks without any repercussions for animal health. No scorching was observed provided that certain measures were adopted while spraying the fertilizer: i.e. little dilution with water, use of low pressure and large droplets and application on dry grass in cloudy whether. In comparison with the granulated ammonium nitrate, the liquid nitrogen fertilizer was less efficient; dry matter yield and N-uptake of the grass treated with the liquid nitrogen fertilizer were 76% and 73% respectively of the dry matter yield and N-uptake of the grass treated with the granulated ammonium nitrate fertilizer.
Fertilization, especially with nitrogen, represents the biggest single cost in grass production. Because liquid nitrogen fertilizers can be produced less expensively then granulated ones, their price per unit of N, delivered to the farmer, is also lower.
Another advantage is that liquid fertilizers are easy to handle (despite being corrosive) and can be distributed uniformly over the field. The greatest advantage can be expected on the large grass areas of continuous grazing systems. Because of these benefits, an investigation was carried out to assess the potential use and efficiency of liquid nitrogen fetilizer in comparison with granulated ammonium nitrate nitrogen, from 1983 up to 1987. In 1983 and 1984, the grass quality, especially NH3 and NO3 concentration directly after spraying, and animal behaviour were assessed. From 1985 to 1987, the grass yield and nitrogen uptake were measured under mowing conditions.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Baert J, Carlier L and De Vliegher A (1989) Landbouwtijdschrift 42: 225–232
Behaeghe T, Eeckhaut G and Traets J (1986) Mededeling nr. 1986/2 van de Leerstoel voor Plantenteelt. Fakulteit van de Landbouwwetenschapen, Rijksuniversiteit Gent
Black AS, Sherlock RR, Smith NP, Cameron KC and Goh KM (1985) New Zealand Journal of Agricultural Research 28: 469–474
Fogh HT (1979) Tidsskrift for planteavl 83: 405–414
Geurink J. Malestein A, Kemp A, Korzeniowski A and Van T Klooster A (1982) Netherlands Journal of Agricultural Science 30: 105–113
Herlihy M (1988) Proceedings 12th General Meeting of the European Grassland Federation, Dublin, Ireland: pp 333–337
Van Burg PFJ, Dilz K and Prins WH (1982) Neth Nitrogen Techn Bull 13
About this article
Cite this article
Carlier, L., Baert, J. & De Vliegher, A. Use and efficiency of a liquid nitrogen fertilizer on grassland. Fertilizer Research 22, 45–48 (1990). https://doi.org/10.1007/BF01054806
- Liquid nitrogen fertilizer
- grass production
- nitrate content
- ammonia content