| http://www.w3.org/ns/prov#value | - The results are in agreement with the ECETOC (1994) and Bouwman et al. (1997) estimates, except for ammonium sulphate and the compound fertilizers including MAP and DAP. The data collected in this report for ammonium sulphate are based on 176 measurements from a great number of different research papers and from different sites with different conditions.
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