CAN ORGANIC FARMING HELP TO REDUCE NATIONAL ENERGY CONSUMPTION AND EMISSIONS OF GREENHOUSE GASSES IN DENMARK? - Economics of Sustainable Energy in Agriculture - page 183

use for each type of energy source (SI) can be compared with the energy
use according to official statistics (ST), and a correction factor (CF=ST/SI)
can be calculated (Table 13.8). These CF-values are then used to correct
the simulated values of energy use in the scenarios for conversion to
organic farming.
Finally, the net energy production from crop residues and biogas is
added to get the national agricultural energy balance. For the 1996-
situation, production values from national statistics are used (13.7 PJ from
straw combustion, and 0.5 PJ biogas from slurry, Danish Energy Agency
1997). In the organic scenarios, it is assumed that no energy production
takes place, because all the straw is needed for deep bedding in the stables,
and mining of carbon in the form of biogas from slurry is perceived
undesirable.

2.3 IPCC's greenhouse gas inventories

The for each fossil fuel is estimated from Equation 13.1,
where C is % carbon in the fuel, is the molecular weight of
g/mole, is the lower combustion value for the fuel, and is the
molecular weight of C= 12 g/mole. From this, factors for the
most common fuels and input factors in agriculture are calculated (Table
13.5). The from biofuels is set to zero, and emissions related
to indirect energy input like machinery and fertilisers are set to the
emission from the energy source, from which these are primarily produced
(The European Commission 1997).

All the from Danish agriculture are presumed to
come from livestock. For each animal type, the

is calculated