English Abstract This report describes the implementation of the set
environmental policy with regard to nutrients (as developed until 1991) in
the agricultural sector of the Dutch economy and its effects on
eutrofication, ammonia-emissions, and heavy metals supply to soils. Part
one describes the assumptions made on key variables, necessary to calculate
the amount of manure produced and its accompanying emissions. Each of these
variables require quantification of its development over time, up until
2010. Such variables include; livestock numbers, composition of excreta,
penetration of techniques that reduce ammonia-volatilization. Part two
gives an overview of (intermediate and final) results of the calculations
and presents data on ammonia emissions from manure, N-, and P-content of
manure produced, application rates of N and P, K, As, Cd, Cu, Pb and Zn
(both from manure and chemical fertilizer) on crop-soil-combinations. It
also contains material balances for nitrogen, phosporus and potassium for
the Dutch agricultural system in the years 1986, 1989, 2000 and
2010.
