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- aggregation classification "P1".
- aggregation creator person.
- aggregation creator person.
- aggregation date "2001".
- aggregation hasFormat 402060.bibtex.
- aggregation hasFormat 402060.csv.
- aggregation hasFormat 402060.dc.
- aggregation hasFormat 402060.didl.
- aggregation hasFormat 402060.doc.
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- aggregation hasFormat 402060.rdf.
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- aggregation hasFormat 402060.txt.
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- aggregation hasFormat 402060.yaml.
- aggregation isPartOf urn:isbn:9789066059740.
- aggregation isPartOf urn:issn:0567-7572.
- aggregation language "eng".
- aggregation publisher "International Society for Horticultural Science (ISHS)".
- aggregation subject "Agriculture and Food Sciences".
- aggregation title "Gaseous N losses from field crops".
- aggregation abstract "Nitrogen cycling in the soil-plant-atmosphere has been a topic of considerable interest over the years. Nitrogen balance studies showed that not all of the soil and fertilizer N could be accounted for at the end of the growing season. In addition to losses by drainage, run-off and erosion, gaseous losses are at least partly responsible for the discrepancy between input and output of nitrogen. Gaseous losses occur by NH3 volatilization from fertilizers, NOx, N2O and N-2 losses by denitrification and nitrification and from NH3 losses from crops. Ammonia volatilization is governed by the chemical characteristics of the soil (pH, CaCO3 content, CEC), by climatological conditions (temperature and moisture content) and by agricultural practices. Urea hydrolysis causes a pH increase and thus NH3 volatilization, even in soils with a low pH. Without precautions, more than 50% of the total NH4+-N content in slurry and more than 30% of the N-content in urea and NH4+-containing fertilizers can be lost by volatilization of NH3. Low temperatures, high moisture contents and/or the quick incorporation of applied fertilizers (organic or inorganic) will reduce these losses. Although abiotic production of NO and N2O is possible, the main processes responsible for the formation of these products are denitrification or as a side product of the nitrification process. Total losses, including N-2 production, can be of the order of 20-30 kg N ha(-1). Available nitrate and organic matter, low oxygen contents as well as some management practices and environmental factors are responsible for high losses by denitrification. Irrigation, common in vegetable cropping systems, can result in higher losses compared to arable crops. Ammonia losses from or absorption by crops depends on the ammonia compensation point. Although there is clear evidence that NH3 losses from crops occur, further research is needed to quantify the net losses more exactly.".
- aggregation authorList BK78787.
- aggregation endPage "162".
- aggregation startPage "155".
- aggregation volume "563".
- aggregation isDescribedBy 402060.
- aggregation similarTo LU-402060.